CA2626560A1 - A method and device for production of nanofibres through electrostatic spinning of solutions or melts of polymers - Google Patents
A method and device for production of nanofibres through electrostatic spinning of solutions or melts of polymers Download PDFInfo
- Publication number
- CA2626560A1 CA2626560A1 CA002626560A CA2626560A CA2626560A1 CA 2626560 A1 CA2626560 A1 CA 2626560A1 CA 002626560 A CA002626560 A CA 002626560A CA 2626560 A CA2626560 A CA 2626560A CA 2626560 A1 CA2626560 A1 CA 2626560A1
- Authority
- CA
- Canada
- Prior art keywords
- base
- nanofibres
- conductivity
- spinning
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010041 electrostatic spinning Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000000155 melt Substances 0.000 title claims abstract description 12
- 238000009987 spinning Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims description 56
- 230000003247 decreasing effect Effects 0.000 claims description 13
- 230000003116 impacting effect Effects 0.000 claims description 11
- 239000000443 aerosol Substances 0.000 claims description 5
- 238000000151 deposition Methods 0.000 claims description 5
- 239000002798 polar solvent Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000004753 textile Substances 0.000 description 9
- 230000005686 electrostatic field Effects 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to the method of production of nanofibres through electrostatic spinning of solutions (14) or melts of polymers, at which the produced nanofibres are deposited on the moving base (2) in the spinning chamber (1), while before entering into the spinning chamber (1) the electrical conductivity of the base (2) is increased. The invention also relates to the device for production of nanofibres through electrostatic spinning of solutions (14) or melts of polymers containing the spinning chamber (1) in which the produced nanofibres are deposited on the base (2). In the direction of motion of the base (2) before the spinning chamber (1) there is arranged the device (3) for increasing the electrical conductivity of the base (2).
Description
A method and device for production of nanofibres through electrostatic spinning of solutions or melts of polymers Technical field The invention relates to the method of production of nanofibres through electrostatic spinning of solutions or melts of polymers, at which the produced nanofibres are deposited on the base in the spinning chamber.
The invention also relates to the device for production of nanofibres through electrostatic spinning of solutions or melts of polymers containing the spinning chamber in which the produced nanofibres are deposited on the base.
Background art The nanofibres are understood as the fibres whose diameter reaches the place values of nanometers (10"9 m), while the diameters of nanofibres produced through common methods of spinning vary in the range from about nm to 800 nm.
The layers of nanofibres are in practice used mostly in connection with other layer of textile as the filtration layers for fine filtration, for manufacturing of protective clothes, in medicine as special selective porous bandages and in 20 many other areas and applications.
The most important method for production of nanofibres is electrostatic spinning of solution or of melt of polymer. At the electrostatic spinning the suitable solution of polymer or the melt of polymer is brought in a suitable manner into the static electrical field, which is generated through the difference of electrical potentials of at least one spinning and at least one collecting electrode. Such created electrostatic, in the time not variable, field after then acts on the solution/melt of polymer, which is brought into the electrostatic field for example by rotation of spinning electrode of so called Coulomb forces of a certain value, which through a suitable choice of electrostatic potentials of the spinning and collecting electrode are acting in the direction from the spinning electrode to the collecting electrode. The required values of these forces, thus also the intensity' of electric field are then given by the fact that upon the process of electrostatic spinning these forces must overcome not only the surface tension of the solution/melt of polymer, but also the forces arising out of viscosity of solution/melt. Through acting of forces of a suitable value onto the layer of solution/melt of 'polymer this layer is being deformed and the equilibrium status~ of all participating forces then results in creating of the so called Taylor cones. From these Taylor cones, upon further acting of Coulomb force, the elongation of primary nucleus of fibre occurs, which after then through its consequent splitting creates the final nanofibres. The nanofibres are then ,,drawn out" from the surface of solution/melt of polymer, this approximately in the direction of lines of forces of electrostatic field created by both electrodes.
In an ideal case, when only the Coulomb forces of the collecting electrode are acting on the nanofibres, the created nanofibres would copy the direction of lines of forces.
It is necessary to catch in a suitable manner the nanofibres created in this manner, preferably still before their contact with the collecting electrode, and to transport them from the spinning area in which the spinning process is taking place. Catching of nanofibres created according to the above mentioned procedure is mostly performed in such a way that into the space between the spinning and collecting electrode there is inserted a suitable base formed in most cases by the textile configuration on whose surface the nanofibres are being deposited and by its motion are being transported out of spinning area.
Upon depositing of nanofibres on surface of the textile configuration in practice there nevertheless occur several problems which result especially from the fact, that the mentioned textile configuration is not conductive in many cases and it has properties of electrical insulator - dielectric. Upon electrostatic spinning of solution/melt of polymer, to the spinning electrode possibly to the solution/melt of polymer, there is brought a certain electric potential, which is by that the spinning electrode is partially dipped into the solution/melt of polymer, brought also to the solution/melt of polymer, respectively to the spinning electrode. The solution/melt of polymer and out of it produced nanofibres bear the same charge as the spinning electrode. After the electrically charged nanofibres are brought to the electrically non-conducting textile configuration, thanks to the insulating properties of the textile configuration the electrical charge is not being carried out, and the textile configuration is being charged with the same charge as the incoming nanofibres have. Charging of the textile configuration occurs according to its type and properties, either immediately or in a short time interval after its contact with the charged nanofibres. This fact has an adverse negative impact to the process of electric spinning, this especially because of the two reasons. The first is a total weakening and the fact that the original electrostatic field becomes non homogenous, another then also the mere repulsion of approaching nanofibres by the base due to the known reality of mutual repulsion of identical charges. This results in a considerably worsened creation of nanofibres, which becomes evident by a marked reduction in homogeneity of nanofibrous layer - if only this layer is being produced at all, by a increased diameter of nanofibres, which at the same time are transported and deposited in the whole spinning space in an undesirable manner. Consequently, the whole process of creation of nanofibres may be totally stopped after then.
The objective of the, invention is to eliminate or at least to minimise the problems which occur during production of nanofibres through electrostatic spinning of solutions or melts of polymers at which the produced nanofibres are being deposited on the base in the spinning chamber.
The principle of invention . The objective of the invention has been reached through the method of production of nanofibres through electrostatic spinning according to the invention whose principle consists in the fact that before coming into the spinning chamber the electrical conductivity of the base is increased. That means the base with an increased electrical conductivity comes into the electrostatic field in the spinning chamber, e.g. instead of the originally electrically non-conductive base the electrically conductive base, so that the above described disturbance of electrostatic field does not occur, and the process of electrostatic spinning is running in its principle in an undisturbed manner as in a case of electrically sufficient conductive base materials.
In some cases it is advantageous if the electrical conductivity on the surface of the base is increased, on its impacting side. In other cases it is necessary because of the technological reasons to increase the electric conductivity in the whole volume of the base.
As described in the claim 4 it is advantageous, if after depositing of the nanofibres on the base the electric conductivity of the base is decreased.
At the same time it is advantageous, if the electric conductivity of the base after the base with the deposited nanofibres leaves the spinning chamber, is decreased. The electrically non-conductive base for a certain period of time then*changes to the electrically conductive base, while the length of this period of time to a certain extend depends on the speed of motion of the base material in the device for electrostatic spinning of the solution/melt of polymer, in some case on the efficiency with which the electrically conductive liquid is removed from the electrically conductive base, while it can be said that the base is electrically conductive only after it enters the equipment for increasing of the electrical conductivity of the base, in the spinning chamber and before leaving the device for decreasing the electric conductivity of the base, which are the part of the device for electrostatic spinning according to the invention.
Electric conductivity of the base unless it is a technological requirement, does not intervene into possible further production operations which are performed outside the spinning device before or after depositing of nanofibrous layer.
Increasing of electric conductivity of the base is reached by bringing the conductivity increasing liquid to the base, which through interaction with the base causes increase in electric conductivity of the base to a required level.
- According to an advantageous execution mentioned in the claim 7 the conductivity increasing liquid is brought to the base in a gaseous status.
Through interaction with the base either the condensate in the form of droplets or a liquid film covering the fibres of the base is created or the molecules of the liquid through the physical forces bind to the fibres and simultaneously to a various extent penetrate into the volume of fibres of the base. In the real practice, the common participation of all these actions could almost always be expected.
The invention also relates to the device for production of nanofibres through electrostatic spinning of solutions or melts of polymers containing the spinning chamber in which the produced nanofibres are deposited on the base.
Background art The nanofibres are understood as the fibres whose diameter reaches the place values of nanometers (10"9 m), while the diameters of nanofibres produced through common methods of spinning vary in the range from about nm to 800 nm.
The layers of nanofibres are in practice used mostly in connection with other layer of textile as the filtration layers for fine filtration, for manufacturing of protective clothes, in medicine as special selective porous bandages and in 20 many other areas and applications.
The most important method for production of nanofibres is electrostatic spinning of solution or of melt of polymer. At the electrostatic spinning the suitable solution of polymer or the melt of polymer is brought in a suitable manner into the static electrical field, which is generated through the difference of electrical potentials of at least one spinning and at least one collecting electrode. Such created electrostatic, in the time not variable, field after then acts on the solution/melt of polymer, which is brought into the electrostatic field for example by rotation of spinning electrode of so called Coulomb forces of a certain value, which through a suitable choice of electrostatic potentials of the spinning and collecting electrode are acting in the direction from the spinning electrode to the collecting electrode. The required values of these forces, thus also the intensity' of electric field are then given by the fact that upon the process of electrostatic spinning these forces must overcome not only the surface tension of the solution/melt of polymer, but also the forces arising out of viscosity of solution/melt. Through acting of forces of a suitable value onto the layer of solution/melt of 'polymer this layer is being deformed and the equilibrium status~ of all participating forces then results in creating of the so called Taylor cones. From these Taylor cones, upon further acting of Coulomb force, the elongation of primary nucleus of fibre occurs, which after then through its consequent splitting creates the final nanofibres. The nanofibres are then ,,drawn out" from the surface of solution/melt of polymer, this approximately in the direction of lines of forces of electrostatic field created by both electrodes.
In an ideal case, when only the Coulomb forces of the collecting electrode are acting on the nanofibres, the created nanofibres would copy the direction of lines of forces.
It is necessary to catch in a suitable manner the nanofibres created in this manner, preferably still before their contact with the collecting electrode, and to transport them from the spinning area in which the spinning process is taking place. Catching of nanofibres created according to the above mentioned procedure is mostly performed in such a way that into the space between the spinning and collecting electrode there is inserted a suitable base formed in most cases by the textile configuration on whose surface the nanofibres are being deposited and by its motion are being transported out of spinning area.
Upon depositing of nanofibres on surface of the textile configuration in practice there nevertheless occur several problems which result especially from the fact, that the mentioned textile configuration is not conductive in many cases and it has properties of electrical insulator - dielectric. Upon electrostatic spinning of solution/melt of polymer, to the spinning electrode possibly to the solution/melt of polymer, there is brought a certain electric potential, which is by that the spinning electrode is partially dipped into the solution/melt of polymer, brought also to the solution/melt of polymer, respectively to the spinning electrode. The solution/melt of polymer and out of it produced nanofibres bear the same charge as the spinning electrode. After the electrically charged nanofibres are brought to the electrically non-conducting textile configuration, thanks to the insulating properties of the textile configuration the electrical charge is not being carried out, and the textile configuration is being charged with the same charge as the incoming nanofibres have. Charging of the textile configuration occurs according to its type and properties, either immediately or in a short time interval after its contact with the charged nanofibres. This fact has an adverse negative impact to the process of electric spinning, this especially because of the two reasons. The first is a total weakening and the fact that the original electrostatic field becomes non homogenous, another then also the mere repulsion of approaching nanofibres by the base due to the known reality of mutual repulsion of identical charges. This results in a considerably worsened creation of nanofibres, which becomes evident by a marked reduction in homogeneity of nanofibrous layer - if only this layer is being produced at all, by a increased diameter of nanofibres, which at the same time are transported and deposited in the whole spinning space in an undesirable manner. Consequently, the whole process of creation of nanofibres may be totally stopped after then.
The objective of the, invention is to eliminate or at least to minimise the problems which occur during production of nanofibres through electrostatic spinning of solutions or melts of polymers at which the produced nanofibres are being deposited on the base in the spinning chamber.
The principle of invention . The objective of the invention has been reached through the method of production of nanofibres through electrostatic spinning according to the invention whose principle consists in the fact that before coming into the spinning chamber the electrical conductivity of the base is increased. That means the base with an increased electrical conductivity comes into the electrostatic field in the spinning chamber, e.g. instead of the originally electrically non-conductive base the electrically conductive base, so that the above described disturbance of electrostatic field does not occur, and the process of electrostatic spinning is running in its principle in an undisturbed manner as in a case of electrically sufficient conductive base materials.
In some cases it is advantageous if the electrical conductivity on the surface of the base is increased, on its impacting side. In other cases it is necessary because of the technological reasons to increase the electric conductivity in the whole volume of the base.
As described in the claim 4 it is advantageous, if after depositing of the nanofibres on the base the electric conductivity of the base is decreased.
At the same time it is advantageous, if the electric conductivity of the base after the base with the deposited nanofibres leaves the spinning chamber, is decreased. The electrically non-conductive base for a certain period of time then*changes to the electrically conductive base, while the length of this period of time to a certain extend depends on the speed of motion of the base material in the device for electrostatic spinning of the solution/melt of polymer, in some case on the efficiency with which the electrically conductive liquid is removed from the electrically conductive base, while it can be said that the base is electrically conductive only after it enters the equipment for increasing of the electrical conductivity of the base, in the spinning chamber and before leaving the device for decreasing the electric conductivity of the base, which are the part of the device for electrostatic spinning according to the invention.
Electric conductivity of the base unless it is a technological requirement, does not intervene into possible further production operations which are performed outside the spinning device before or after depositing of nanofibrous layer.
Increasing of electric conductivity of the base is reached by bringing the conductivity increasing liquid to the base, which through interaction with the base causes increase in electric conductivity of the base to a required level.
- According to an advantageous execution mentioned in the claim 7 the conductivity increasing liquid is brought to the base in a gaseous status.
Through interaction with the base either the condensate in the form of droplets or a liquid film covering the fibres of the base is created or the molecules of the liquid through the physical forces bind to the fibres and simultaneously to a various extent penetrate into the volume of fibres of the base. In the real practice, the common participation of all these actions could almost always be expected.
5 At the execution according to the claim 8 the liquid is brought to the base in a liquid state, while according to the claim 9 it is advantageous if the liquid is brought in the form of aerosol.
The suitable conductivity increasing liquids are the polar solvents. If there is a requirement for preserving of conductivity of the base after applying the layer of nanofibres, the conductivity increasing liquid are the solutions of salts, which after drying create on the base the conductive layer at least from the impacting side of the base. With advantage decreasing of electric conductivity of the base could be achieved through removing the conductivity increasing liquid from the base or at least by reducing the quantity of the conductivity increasing liquid in the base.
The principle of the equipment for production of nanofibres through electrostatic spinning of solutions or melts of polymers according to the invention lies in the fact that in the direction of motion of the base before the spinning chamber there is arranged a device for increasing the electrical conductivity of the base.
At the same time it'is advantageous if in the direction of motion of the base after the spinning chamber there is arranged the device for decreasing the electrical conductivity of the base.
The device for increasing of electrical conductivity of the base contains in the advantageous execution the means for bringing the conductivity increasing liquid to the base, this either to both sides of the base or to the impacting side of the base.
Description of the drawing The example of embodiment of the device according to the invention is schematically shown in the drawing.
The suitable conductivity increasing liquids are the polar solvents. If there is a requirement for preserving of conductivity of the base after applying the layer of nanofibres, the conductivity increasing liquid are the solutions of salts, which after drying create on the base the conductive layer at least from the impacting side of the base. With advantage decreasing of electric conductivity of the base could be achieved through removing the conductivity increasing liquid from the base or at least by reducing the quantity of the conductivity increasing liquid in the base.
The principle of the equipment for production of nanofibres through electrostatic spinning of solutions or melts of polymers according to the invention lies in the fact that in the direction of motion of the base before the spinning chamber there is arranged a device for increasing the electrical conductivity of the base.
At the same time it'is advantageous if in the direction of motion of the base after the spinning chamber there is arranged the device for decreasing the electrical conductivity of the base.
The device for increasing of electrical conductivity of the base contains in the advantageous execution the means for bringing the conductivity increasing liquid to the base, this either to both sides of the base or to the impacting side of the base.
Description of the drawing The example of embodiment of the device according to the invention is schematically shown in the drawing.
Examples of embodiment The method of production of nanofibres through electrostatic spinning and the device for production of nanofibres through electrostatic spinning of solutions or melts of polymer will be explained on the example of embodiment of the device for production of nanofibres through electrostatic spinning of solution of polymer schematically shown in the drawing, which contains the spinning chamber 1, in which there is positioned the spinning electrode 11, the collecting electrode 12 and the reservoir 13 of the solution 14 of polymer.
The spinning electrode 11 is in a known manner in a pivoted way mounted in the reservoir 13 of solution of polymer and with a section of its surface intervenes into the solution 14 of polymer in the reservoir 13. Upon rotation of the spinning electrode 11 around its longitudinal axis the spinning electrode 11 carries out with its surface a certain quantity of solution 14 of polymer into the spinning space 15 between the spinning electrode 11 and the collecting electrode 12.
The collecting electrode 12 is arranged above the spinning electrode 11, while the longitudinal axis of the spinning electrode 11 is parallel with the plane, which is tangential to the surface of the collecting electrode 12, while the collecting electrode 12 and the spinning electrode 11 are in a known not illustrated manner connected to the opposite poles of the source of high voltage or the one is grounded and to the second there is brought one pole of a high voltage. In this way there is between them created the electrical field, which through its action of force to the volume of solution of polymer, carried out by the rotation motion of the spinning electrode 11 on the surface of spinning electrode 11 into the electrostatic field, ensures origination of Taylor cones and after then also origination of nanofibres. Voltage to the spinning electrode can be brought also through bringing voltage into the spinning solution 14 of polymer through some of the known methods.
At the illustrated example of embodiment there is in the space between the collecting electrode 12 and the spinning electrode 11 created in the spinning chamber 1 in the vicinity of the collecting electrode 12 the track for guiding the base 2, which is usually represented by a strip mostly of a textile material.
The spinning electrode 11 is in a known manner in a pivoted way mounted in the reservoir 13 of solution of polymer and with a section of its surface intervenes into the solution 14 of polymer in the reservoir 13. Upon rotation of the spinning electrode 11 around its longitudinal axis the spinning electrode 11 carries out with its surface a certain quantity of solution 14 of polymer into the spinning space 15 between the spinning electrode 11 and the collecting electrode 12.
The collecting electrode 12 is arranged above the spinning electrode 11, while the longitudinal axis of the spinning electrode 11 is parallel with the plane, which is tangential to the surface of the collecting electrode 12, while the collecting electrode 12 and the spinning electrode 11 are in a known not illustrated manner connected to the opposite poles of the source of high voltage or the one is grounded and to the second there is brought one pole of a high voltage. In this way there is between them created the electrical field, which through its action of force to the volume of solution of polymer, carried out by the rotation motion of the spinning electrode 11 on the surface of spinning electrode 11 into the electrostatic field, ensures origination of Taylor cones and after then also origination of nanofibres. Voltage to the spinning electrode can be brought also through bringing voltage into the spinning solution 14 of polymer through some of the known methods.
At the illustrated example of embodiment there is in the space between the collecting electrode 12 and the spinning electrode 11 created in the spinning chamber 1 in the vicinity of the collecting electrode 12 the track for guiding the base 2, which is usually represented by a strip mostly of a textile material.
In the direction of motion of the base 2 before the spinning chamber I
there is arranged an equipment 3 for increasing the electric conductivity of the base. In the direction of movement of the base after the spinning chamber I
there is arranged a device 4 for decreasing of electrical conductivity of the base 2.
In the illustrated example of embodiment the base 2 is in a known manner unwound from the carrier roll 5 and before entering the device 3 for increasing the electrical conductivity of the base it passes through a pair of feeding rollers 6: After leaving the device 4 for decreasing the electrical conductivity of the base the base 2 with the deposited layer of nanofibres passes through a pair of take-up rollers 7 and it is in a known manner wound onto the fabric roll 8. .
In the device 3 for increasing the electrical conductivity of the base 2 there are against the base 2 arranged the means 31 and 32 for bringing the conductivity increasing liquid 311 to the base 2, while the first means 31 for bringing the conductivity increasing liquid 311 to the base 2 are oriented to the impacting side 21 of the base 2 and the second means 32 for bringing the conductivity increasing liquid 311 to the base 2 are oriented to the opposite side of the base 2. The impacting side 21 is the side of the base 2 facing the spinning electrode 11. At the same time the conductivity increasing liquid 311 may be in a liquid or gaseous state.
In case of a liquid state to the base 2 there is brought aerosol of a liquid which on the surface of the base creates from one or from both sides a liquid film and/or the molecules of the liquid through the physical forces bind to the base and simultaneously to a various extent penetrate into the volume of the base 2. At the same time for a quality spinning it is essential that the conductivity increasing liquid 311 is applied at least to the impacting side 21 of the base 2.
If there is a requirement to preserve conductivity of the base 2 after applying a layer of nanofibres, the conductivity increasing liquid 311 are the solutions of salts, which after drying create on the base 2 the conductive layer at least from the impacting side 21 of the base.
In case of a gaseous state of the conductivity increasing liquid 311 to the base there are brought the vapours of a liquid, which through interaction with the base 2 create a condensate in the form of droplets and/or a liquid film and/or the molecules of the liquid through the physical forces bind to the base and simultaneously to a various extent penetrate into the volume of the base 2.
The conductivity increasing liquid is the polar solvent, e.g. alcohol or an acid. The polar solvents are understood as the solvents which contain a dipole in its molecule.
In this manner the electrically non-conductive base becomes the electrically conductive base and at the electrically conductive base the electrical conductivity is being increased. The treatment of electrically non-conductive base 2 to the electrically conductive base 2 is running in the device 3 for increasing of the electrical conductivity of the base, which is positioned before the spinning chamber 1. After entering the device 3 for increasing of the electrical conductivity of the base to the base 2 there is applied the conductivity increasing liquid 311, which renders to the electrically non-conductive base 2 a certain electrical conductivity, as from the point of view of fluency of the process of electrostatic spinning it is advantageous that the electrically non-conductive base 2 after being brought into the electrostatic field between the spinning electrode 11 and collecting electrode 12 was acting to a certain level as an electric conductor. Applying of the conductivity increasing liquid 311 to the base 2 is being realised through some of the known methods and the liquid is brought to the surface of the base 2 from its one and/or second side, where it is captured. From the above mentioned it is then obvious that into the device 3,for increasing the electrical conductivity of the base there is entering the electrically non-conductive base 2 and from it leaves the electrically conductive base whose electrical conductivity is caused by presence of the conductivity increasing liquid 311 on the impacting side 21 of the base or in the whole volume of the base 2. From the device 3 for increasing the electrical conductivity of the base the electrically conductive base 2 enters the spinning chamber 1.
In the spinning chamber I through the force acting of electric field between the spinning electrode 11 and collecting electrode 12 the nanofibres are produced and they are deposited on the electrically conductive base 2.
After depositing of a layer of nanofibres of required parameters the electrically conductive base 2 with deposited layer of nanofibres leaves the spinning chamber I and it is led to the device 4 for reducing the electrical conductivity of the base 2, which, in the illustrated embodiment, consists of drying chamber in which the electrically conductive liquid is removed from the electrically conductive base 2 with deposited layer of nanofibres, through which the electrically conductive base 2 with deposited layer of nanofibres becomes an electrically non-conductive base with deposited layer of nanofibres. One of possible ways for removing the electrically conductive liquid is for example drying when the electrically conductive base 2 with deposited layer of nanofibres is subject to stream of a certain quantity of air having a certain temperature and speed. The resulting product leaving the device 3 for increasing the electrical conductivity of the base is after then electrically non-conductive base 2 with deposited layer of nanofibres. The decreasing of electrical conductivity of the base 2 takes place gradually also in the spinning chamber, nevertheless to the greatest extent the conductivity is reduced only after the nanofibres are deposited. The above mentioned solution illustrated in the Fig. 1 seams to be an optimum one.
The conductivity increasing liquid is brought to the base in the form of vapours and/or aerosol, while aerosol may be replaced by a stream of liquid from the nozzles arranged along the width of the base 2. The means for bringing the conductivity increasing liquid 311 in the gaseous state are with advantage created by nozzles arranged along the width of the base 2.
The rate of increasing of electrical conductivity of the base 2 is being regulated either by changes of forward motion of the base 2 or by a quantity of the conductivity increasing liquid 311 being brought.
The conductivity increasing liquid 311 is from the base 2 removed in various manners in the washing and/or drying device, for example it is at least partially removed by washing in a suitable solvent, after which the solvent and the possible rests of the conductivity increasing liquid 311 are from the base 5 removed by heating and/or flushing and/or rinsing by air and/or other gas.
In other embodiment the conductive increasing liquid 311 is from the base removed by heating and/or flushing and/or rinsing by air and/or by other gas.
Heating is performed by means of microwave and/or infrared radiation and/or using a warm air and/or other warm gas.
List of referential markings 1 spinning chamber 11 spinning electrode 12 collecting electrode 13 reservoir for solution of polymer 14 solution of polymer spinning space 2 base 10 21 impacting side of the base 3 device for increasing the electrical conductivity of the base 31,32 means for bringing the conductivity increasing liquid to the base 311 conductivity increasing liquid 4 device for decreasing the electrical conductivity of the base 15 5 carrier roll 6 pair of feeding rollers 7 pair of take-up rollers 8 fabric roll
there is arranged an equipment 3 for increasing the electric conductivity of the base. In the direction of movement of the base after the spinning chamber I
there is arranged a device 4 for decreasing of electrical conductivity of the base 2.
In the illustrated example of embodiment the base 2 is in a known manner unwound from the carrier roll 5 and before entering the device 3 for increasing the electrical conductivity of the base it passes through a pair of feeding rollers 6: After leaving the device 4 for decreasing the electrical conductivity of the base the base 2 with the deposited layer of nanofibres passes through a pair of take-up rollers 7 and it is in a known manner wound onto the fabric roll 8. .
In the device 3 for increasing the electrical conductivity of the base 2 there are against the base 2 arranged the means 31 and 32 for bringing the conductivity increasing liquid 311 to the base 2, while the first means 31 for bringing the conductivity increasing liquid 311 to the base 2 are oriented to the impacting side 21 of the base 2 and the second means 32 for bringing the conductivity increasing liquid 311 to the base 2 are oriented to the opposite side of the base 2. The impacting side 21 is the side of the base 2 facing the spinning electrode 11. At the same time the conductivity increasing liquid 311 may be in a liquid or gaseous state.
In case of a liquid state to the base 2 there is brought aerosol of a liquid which on the surface of the base creates from one or from both sides a liquid film and/or the molecules of the liquid through the physical forces bind to the base and simultaneously to a various extent penetrate into the volume of the base 2. At the same time for a quality spinning it is essential that the conductivity increasing liquid 311 is applied at least to the impacting side 21 of the base 2.
If there is a requirement to preserve conductivity of the base 2 after applying a layer of nanofibres, the conductivity increasing liquid 311 are the solutions of salts, which after drying create on the base 2 the conductive layer at least from the impacting side 21 of the base.
In case of a gaseous state of the conductivity increasing liquid 311 to the base there are brought the vapours of a liquid, which through interaction with the base 2 create a condensate in the form of droplets and/or a liquid film and/or the molecules of the liquid through the physical forces bind to the base and simultaneously to a various extent penetrate into the volume of the base 2.
The conductivity increasing liquid is the polar solvent, e.g. alcohol or an acid. The polar solvents are understood as the solvents which contain a dipole in its molecule.
In this manner the electrically non-conductive base becomes the electrically conductive base and at the electrically conductive base the electrical conductivity is being increased. The treatment of electrically non-conductive base 2 to the electrically conductive base 2 is running in the device 3 for increasing of the electrical conductivity of the base, which is positioned before the spinning chamber 1. After entering the device 3 for increasing of the electrical conductivity of the base to the base 2 there is applied the conductivity increasing liquid 311, which renders to the electrically non-conductive base 2 a certain electrical conductivity, as from the point of view of fluency of the process of electrostatic spinning it is advantageous that the electrically non-conductive base 2 after being brought into the electrostatic field between the spinning electrode 11 and collecting electrode 12 was acting to a certain level as an electric conductor. Applying of the conductivity increasing liquid 311 to the base 2 is being realised through some of the known methods and the liquid is brought to the surface of the base 2 from its one and/or second side, where it is captured. From the above mentioned it is then obvious that into the device 3,for increasing the electrical conductivity of the base there is entering the electrically non-conductive base 2 and from it leaves the electrically conductive base whose electrical conductivity is caused by presence of the conductivity increasing liquid 311 on the impacting side 21 of the base or in the whole volume of the base 2. From the device 3 for increasing the electrical conductivity of the base the electrically conductive base 2 enters the spinning chamber 1.
In the spinning chamber I through the force acting of electric field between the spinning electrode 11 and collecting electrode 12 the nanofibres are produced and they are deposited on the electrically conductive base 2.
After depositing of a layer of nanofibres of required parameters the electrically conductive base 2 with deposited layer of nanofibres leaves the spinning chamber I and it is led to the device 4 for reducing the electrical conductivity of the base 2, which, in the illustrated embodiment, consists of drying chamber in which the electrically conductive liquid is removed from the electrically conductive base 2 with deposited layer of nanofibres, through which the electrically conductive base 2 with deposited layer of nanofibres becomes an electrically non-conductive base with deposited layer of nanofibres. One of possible ways for removing the electrically conductive liquid is for example drying when the electrically conductive base 2 with deposited layer of nanofibres is subject to stream of a certain quantity of air having a certain temperature and speed. The resulting product leaving the device 3 for increasing the electrical conductivity of the base is after then electrically non-conductive base 2 with deposited layer of nanofibres. The decreasing of electrical conductivity of the base 2 takes place gradually also in the spinning chamber, nevertheless to the greatest extent the conductivity is reduced only after the nanofibres are deposited. The above mentioned solution illustrated in the Fig. 1 seams to be an optimum one.
The conductivity increasing liquid is brought to the base in the form of vapours and/or aerosol, while aerosol may be replaced by a stream of liquid from the nozzles arranged along the width of the base 2. The means for bringing the conductivity increasing liquid 311 in the gaseous state are with advantage created by nozzles arranged along the width of the base 2.
The rate of increasing of electrical conductivity of the base 2 is being regulated either by changes of forward motion of the base 2 or by a quantity of the conductivity increasing liquid 311 being brought.
The conductivity increasing liquid 311 is from the base 2 removed in various manners in the washing and/or drying device, for example it is at least partially removed by washing in a suitable solvent, after which the solvent and the possible rests of the conductivity increasing liquid 311 are from the base 5 removed by heating and/or flushing and/or rinsing by air and/or other gas.
In other embodiment the conductive increasing liquid 311 is from the base removed by heating and/or flushing and/or rinsing by air and/or by other gas.
Heating is performed by means of microwave and/or infrared radiation and/or using a warm air and/or other warm gas.
List of referential markings 1 spinning chamber 11 spinning electrode 12 collecting electrode 13 reservoir for solution of polymer 14 solution of polymer spinning space 2 base 10 21 impacting side of the base 3 device for increasing the electrical conductivity of the base 31,32 means for bringing the conductivity increasing liquid to the base 311 conductivity increasing liquid 4 device for decreasing the electrical conductivity of the base 15 5 carrier roll 6 pair of feeding rollers 7 pair of take-up rollers 8 fabric roll
Claims (17)
1. The method of production of nanofibres through electrostatic spinning of solutions or melts of polymers, at which the produced nanofibres are deposited on the moving base in the spinning chamber characterised by that the electrical conductivity of the base (2) is increased before entering into the spinning chamber (1).
2. The method according to the claim 1, characterised by that the electrical conductivity of the base is increased on surface of the base (2) on its impacting side (21).
3. The method according to the claim 1 characterised by that the electrical conductivity of the base is increased in the whole volume of the base.
4. The method as claimed in any of the claims 1 to 3 characterised by that the electrical conductivity of the base (2) is decreased after depositing of nanofibres.
5. The method according to the claim 4 characterised by that the electrical conductivity of the base (2) is being decreased after the base (2) with deposited nanofibres leaves the spinning chamber (1).
6. The method according to any of the previous claims characterised by that the increasing of electrical conductivity of the base (2) is reached through bringing the conductivity increasing liquid (311) to the base (2).
7. The method according to the claim 6 characterised by that the conductivity increasing liquid (311) is brought to the base (2) in a gaseous state.
8. The method according to the claim 6 or 7 characterised by that the conductivity increasing liquid (311) is brought to the base (2) in a liquid state.
9. The method according to the claim 8, characterised by that the liquid is brought in a form of aerosol.
10. The method according to any of the previous claims characterised by that the conductivity increasing liquid (311) is a polar solvent.
11. The method as claimed in any of the claims 1 to 10, characterised by that the conductivity increasing liquid (311) is a solution of salt.
12. The method as claimed in any of the claims 4 to 11, characterised by that the decreasing of electrical conductivity of the base (2) is reached by removing the conductivity increasing liquid (311) from the base (2) or at least by reducing the quantity of the conductivity increasing liquid (311) in the base (2).
13. The device for production of nanofibres through electrostatic spinning of solutions or melts of polymers containing the spinning chamber, in which the created nanofibres are deposited to the base, characterised by that the device (3) for increasing of the electrical conductivity of the base (2) is arranged in the direction of motion of the base (2) before the spinning chamber (1).
14. The device according to the claim 13, characterised by that the device (4) for decreasing the electrical conductivity of the base (2) is arranged after the spinning chamber (1).
15. The device according to the claim 13 or 14, characterised by that the device (3) for increasing the electrical conductivity of the base (2) contains the means (31, 32) for bringing the conductivity increasing liquid (311) to the base (2).
16. The device according to the claim 15, characterised by that the means (31, 32) for bringing the conductivity increasing liquid (311) are arranged along both sides of the base (2).
17. The device according to the claim 15, characterised by that the means (32) for bringing the conductivity increasing liquid (311) to the base (2) are arranged on the impacting side of the base (2).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CZ2005-702A CZ305244B6 (en) | 2005-11-10 | 2005-11-10 | Process for producing nanofibers by electrostatic spinning of solutions or melts of polymers and apparatus for making the same |
| CZPV2005-702 | 2005-11-10 | ||
| PCT/CZ2006/000076 WO2007054039A1 (en) | 2005-11-10 | 2006-11-02 | A method and device for production of nanofibres through electrostatic spinning of solutions or melts of polymers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2626560A1 true CA2626560A1 (en) | 2007-05-18 |
Family
ID=37852303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002626560A Abandoned CA2626560A1 (en) | 2005-11-10 | 2006-11-02 | A method and device for production of nanofibres through electrostatic spinning of solutions or melts of polymers |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20080284050A1 (en) |
| JP (1) | JP2009515060A (en) |
| CN (1) | CN101305117A (en) |
| CA (1) | CA2626560A1 (en) |
| CZ (1) | CZ305244B6 (en) |
| WO (1) | WO2007054039A1 (en) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7717975B2 (en) | 2005-02-16 | 2010-05-18 | Donaldson Company, Inc. | Reduced solidity web comprising fiber and fiber spacer or separation means |
| US8334121B2 (en) | 2006-02-13 | 2012-12-18 | Donaldson Company, Inc. | Method of converting cellulosic biomass to alcohol using web comprising fine fiber and bioactive particulate |
| US7988860B2 (en) | 2007-03-15 | 2011-08-02 | Donaldson Company Inc. | Superabsorbent-containing web that can act as a filter, absorbent, reactive layer or fuel fuse |
| CN101680118A (en) | 2007-05-30 | 2010-03-24 | 陶氏环球技术公司 | high-output solvent-based electrospinning |
| CZ2007727A3 (en) * | 2007-10-18 | 2009-04-29 | Nanopeutics S. R. O. | Collecting electrode of a device for producing nanofibers by electrostatic spinning of polymer matrices and device comprising such collecting electrode |
| BRPI0817217B1 (en) | 2007-11-20 | 2021-02-09 | Clarcor Inc. | filter medium comprising fine fibers and method for forming the same |
| US7815427B2 (en) | 2007-11-20 | 2010-10-19 | Clarcor, Inc. | Apparatus and method for reducing solvent loss for electro-spinning of fine fibers |
| US7967588B2 (en) | 2007-11-20 | 2011-06-28 | Clarcor Inc. | Fine fiber electro-spinning equipment, filter media systems and methods |
| JP4941939B2 (en) * | 2007-12-11 | 2012-05-30 | パナソニック株式会社 | Nanofiber manufacturing apparatus and nanofiber manufacturing method |
| US20090156740A1 (en) | 2007-12-15 | 2009-06-18 | Annette Lechtenboehmer | Tire with component containing polymeric nanofiber |
| EP2294252B1 (en) * | 2008-06-24 | 2013-08-14 | Stellenbosch University | Method and apparatus for the production of fine fibres |
| US20100127434A1 (en) * | 2008-11-25 | 2010-05-27 | Rene Broos | Extruding organic polymers |
| JP2012520761A (en) | 2009-03-19 | 2012-09-10 | イー・エム・デイー・ミリポア・コーポレイシヨン | Removal of microorganisms from fluid data using nanofiber filtration media |
| CN101586288B (en) * | 2009-07-06 | 2011-08-31 | 江苏泰灵生物科技有限公司 | Array multi-nozzle electrospinning device |
| CZ308360B6 (en) * | 2009-08-06 | 2020-06-24 | Elmarco S.R.O. | Rotary spinning electrode |
| JP5368287B2 (en) * | 2009-12-14 | 2013-12-18 | パナソニック株式会社 | Nanofiber manufacturing apparatus and nanofiber manufacturing method |
| US20110210081A1 (en) | 2010-02-26 | 2011-09-01 | Clarcor Inc. | Fine fiber liquid particulate filter media |
| CZ302873B6 (en) * | 2010-03-05 | 2011-12-28 | Šafár@Václav | Process for producing nanofibers by spinning polymeric solution in electrostatic field and apparatus for making the same |
| CN101857976B (en) * | 2010-05-19 | 2011-06-08 | 青岛大学 | Device for preparing nano fibers with ordered arrangement and cross structures |
| EP2603611B1 (en) | 2010-08-10 | 2019-12-18 | EMD Millipore Corporation | Method for retrovirus removal |
| WO2012050682A2 (en) | 2010-09-30 | 2012-04-19 | Applied Materials, Inc. | Electrospinning for integrated separator for lithium-ion batteries |
| CZ201124A3 (en) | 2011-01-17 | 2012-06-13 | Elmarco S.R.O. | Carrier for oromucosal, especially sublingual application of physiologically active compounds |
| WO2012135679A2 (en) | 2011-04-01 | 2012-10-04 | Emd Millipore Corporation | Nanofiber containing composite structures |
| CZ2011424A3 (en) | 2011-07-14 | 2012-09-19 | Elmarco S.R.O. | Substrate for culturing cells and process for preparing thereof |
| CN103451749A (en) * | 2012-05-30 | 2013-12-18 | 湖南博弈飞装备新材料研究所 | Continuous electrostatic spinning system and method for preparing fine fibers |
| CN102704192A (en) * | 2012-06-25 | 2012-10-03 | 天津工业大学 | Production device for multi-roll solid-pin electrode nanofiber non-woven fabrics |
| CN102704193A (en) * | 2012-06-25 | 2012-10-03 | 威程(天津)科技有限公司 | Non-woven cloth production device for multiple solid pin electrode nano fiber |
| KR101390532B1 (en) * | 2012-08-23 | 2014-04-30 | 성균관대학교산학협력단 | Apparatus for forming patterns |
| CN108610437A (en) | 2013-03-14 | 2018-10-02 | 金珂生物医疗公司 | Bio-compatible and biological absorbable derivative chitosan composite |
| KR102072698B1 (en) * | 2013-08-27 | 2020-03-02 | 주식회사 엘지화학 | Apparatus for manufacturing hollow fiber membrane |
| WO2015028530A2 (en) * | 2013-08-29 | 2015-03-05 | Mahle International Gmbh | Filter material, filter element, and a method and device for producing a filter material |
| EP3038733A2 (en) * | 2013-08-29 | 2016-07-06 | Mahle International GmbH | Filter material, filter element, and a method and device for producing a filter material |
| CN103451754B (en) * | 2013-09-22 | 2015-08-26 | 北京化工大学 | A kind of batch prepares melt differential EFI device for spinning and the technique of nanofiber |
| CN104005693B (en) * | 2014-06-11 | 2016-03-23 | 北京华夏英蓝科技发展有限公司 | A kind of embedded anti-haze is breathed freely the structure of tracery |
| EP3160612B1 (en) | 2014-06-26 | 2023-09-13 | EMD Millipore Corporation | Fluid filtration device with enhanced dirt holding capacity |
| CZ306536B6 (en) * | 2014-11-26 | 2017-03-01 | AUDACIO, s. r. o. | A device for producing submicron fibres and nanofibres in an electrostatic field |
| KR102206963B1 (en) | 2015-04-17 | 2021-01-25 | 이엠디 밀리포어 코포레이션 | Method of purifying a biological material of interest in a sample using nanofiber ultrafiltration membranes operated in tangential flow filtration mode |
| CZ306923B6 (en) | 2016-10-06 | 2017-09-13 | Nafigate Corporation, A.S. | A method of depositing a layer of polymeric nanofibres prepared by electrostatic spinning of a polymer solution or melt into electrically non-conductive materials, and a multilayer composite comprising at least one layer of polymeric nanofibres prepared this way |
| EP3565920B1 (en) * | 2017-01-06 | 2020-11-25 | SABIC Global Technologies B.V. | Apparatus for electrospinning liquid polymer into nanoscale or submicron scale fibers |
| CZ309078B6 (en) * | 2018-05-28 | 2022-01-19 | Contipro A.S. | Device and method of producing nano- and / or microfibrous layers with increased thickness uniformity |
| WO2019237018A1 (en) | 2018-06-08 | 2019-12-12 | Ascend Performance Materials Operations Llc | Tunable nanofiber nonwoven products |
| JP2022527393A (en) | 2019-04-12 | 2022-06-01 | アセンド・パフォーマンス・マテリアルズ・オペレーションズ・リミテッド・ライアビリティ・カンパニー | Nonwoven multi-layer structure with nanofiber layer |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3493462A (en) * | 1962-07-06 | 1970-02-03 | Du Pont | Nonpatterned,nonwoven fabric |
| EP0162645A1 (en) * | 1984-05-11 | 1985-11-27 | Masami Harada | Carbon-fiber-covered material |
| US5296172A (en) * | 1992-07-31 | 1994-03-22 | E. I. Du Pont De Nemours And Company | Electrostatic field enhancing process and apparatus for improved web pinning |
| DE69435251D1 (en) * | 1993-08-17 | 2009-12-31 | Minnesota Mining & Mfg | METHOD OF CHARGING ELECTRONIC FILTER MEDIA |
| US5643524A (en) * | 1994-12-30 | 1997-07-01 | E. I. Du Pont De Nemours And Company | Corona charging of flash spun plexifilamentary film-fibril webs in poor charging environments |
| US6406657B1 (en) * | 1999-10-08 | 2002-06-18 | 3M Innovative Properties Company | Method and apparatus for making a fibrous electret web using a wetting liquid and an aqueous polar liquid |
| US6713011B2 (en) * | 2001-05-16 | 2004-03-30 | The Research Foundation At State University Of New York | Apparatus and methods for electrospinning polymeric fibers and membranes |
| US6685956B2 (en) * | 2001-05-16 | 2004-02-03 | The Research Foundation At State University Of New York | Biodegradable and/or bioabsorbable fibrous articles and methods for using the articles for medical applications |
| CZ294274B6 (en) * | 2003-09-08 | 2004-11-10 | Technická univerzita v Liberci | Process for producing nanofibers from polymeric solution by electrostatic spinning and apparatus for making the same |
| KR100578764B1 (en) * | 2004-03-23 | 2006-05-11 | 김학용 | A bottom-up electrospinning devices, and nanofibers prepared by using the same |
-
2005
- 2005-11-10 CZ CZ2005-702A patent/CZ305244B6/en unknown
-
2006
- 2006-11-02 JP JP2008539217A patent/JP2009515060A/en active Pending
- 2006-11-02 CN CNA2006800420124A patent/CN101305117A/en active Pending
- 2006-11-02 US US12/093,143 patent/US20080284050A1/en not_active Abandoned
- 2006-11-02 CA CA002626560A patent/CA2626560A1/en not_active Abandoned
- 2006-11-02 WO PCT/CZ2006/000076 patent/WO2007054039A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN101305117A (en) | 2008-11-12 |
| WO2007054039A1 (en) | 2007-05-18 |
| US20080284050A1 (en) | 2008-11-20 |
| CZ305244B6 (en) | 2015-07-01 |
| CZ2005702A3 (en) | 2007-06-27 |
| JP2009515060A (en) | 2009-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080284050A1 (en) | Method and Device for Production of Nanofibres Through Electrostatic Spinning of Solutions or Melts of Polymers | |
| Sun et al. | The effect of solvent dielectric properties on the collection of oriented electrospun fibers | |
| CA2536595C (en) | Method of nanofibres production from a polymer solution using electrostatic spinning and a device for carrying out the method | |
| US7582247B2 (en) | Electroblowing fiber spinning process | |
| US2158416A (en) | Method and apparatus for the production of artificial fibers | |
| US20060012084A1 (en) | Electroblowing web formation process | |
| WO2008106903A2 (en) | Device for production of nanofibres and/or nanoparticles from solutions or melts of polymers in electrostatic field | |
| JPH0140141B2 (en) | ||
| JPS60126373A (en) | Electret producing method and its product | |
| CZ2007179A3 (en) | Linear fibrous formation containing polymeric nanofibers, process of its manufacture and apparatus for producing such formation su | |
| CA2675205A1 (en) | Method and device for production of a layer of nanofibres from solutions or melts of polymers | |
| Khamforoush et al. | Modification of the rotating jet method to generate highly aligned electrospun nanofibers | |
| Cardenas et al. | Growth of sub-micron fibres of pure polyaniline using the electrospinning technique | |
| JP2021500494A (en) | Electrospinning equipment and electrospinning method | |
| EP3408438B1 (en) | Apparatus and process for uniform deposition of polymeric nanofibers on substrate | |
| KR20090092329A (en) | Infrared solvent stripping process | |
| Kessick et al. | Microscale electrospinning of polymer nanofiber interconnections | |
| Mondal et al. | Electrospun self‐assembled nanofiber yarns | |
| US20040219578A1 (en) | Method for forming microscopic polymer interconnections | |
| US3097056A (en) | Melt-spinning of polymers | |
| EP0598195B1 (en) | Method and apparatus for treating a yarn-like product | |
| Yener et al. | Roller Electrospinning System: A Novel Method to Producing Nanofibers | |
| JP4907139B2 (en) | Method for manufacturing fiber assembly and apparatus for manufacturing the same | |
| Veit | Fine Fibers | |
| Yener et al. | New measurement methods for studying of mechanism of roller electrospinning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |