CN106757417B - A kind of same core different sheath microfluidic control spray head, device for spinning and spinning process side by side - Google Patents
A kind of same core different sheath microfluidic control spray head, device for spinning and spinning process side by side Download PDFInfo
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- CN106757417B CN106757417B CN201611122996.9A CN201611122996A CN106757417B CN 106757417 B CN106757417 B CN 106757417B CN 201611122996 A CN201611122996 A CN 201611122996A CN 106757417 B CN106757417 B CN 106757417B
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- 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
-
- 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
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/52—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated carboxylic acids or unsaturated esters
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The present invention provides a kind of same core different sheath microfluidic control spray heads, an including total capillary, the first tortuous capillary and the second tortuous capillary side by side；The section of the outlet end of total capillary is ellipse；First tortuous capillary is arranged in total capillary, the outlet end of total capillary is stretched out in the outlet end of first tortuous capillary, the bending part of first tortuous capillary is pierced by from the side of total capillary, and lateral wall of first tortuous capillary in total capillary is close to the inner sidewall of total capillary；The second straight line section of second tortuous capillary is arranged in inside total capillary and penetrates in the straightway of the first capillary, it is stretched out from the outlet end of the first capillary, the lateral wall of the second tortuous capillary is close to the inner sidewall close to total capillary middle section of the first capillary.A kind of high-voltage electrostatic spinning device containing above-mentioned spray head is additionally provided, the nanofiber for providing multistage arrangement architecture feature can be effectivelyed prepared with single step using above-mentioned apparatus.
Description
Technical field
The invention belongs to field of nano material preparation, more particularly to a kind of same core side by side different sheath microfluidic control spray head,
A kind of multi-fluid electric spinning equipment with same core different sheath microfluidic control spray head side by side, and the device is utilized to carry out electrospinning single step system
The method of standby same core different sheath structure nano fiber side by side.
Background technique
High-voltage electrostatic spinning technology (abbreviation electrospinning) is the nano-fabrication technique of a kind of (top-down) from top to bottom, is led to
Cross extra electric field power overcome spray head tip drop surface tension of liquid and viscoelastic power and form jet stream, in electrostatic repulsion, coulomb
Under power and surface tension collective effect, the liquid jet after being atomized is by high frequency flexural, drawing, division, the quilt within a few tens of milliseconds
Drawing-off thousands of times obtains nano-scale fiber in receiving end through solvent volatilization or melt are cooling.The technical matters process is simple, manipulates
Conveniently, selection material ranges are extensive, controllability is strong and can pass through sprinkler design prepares the nanometer with microstructure characteristic
Fiber, it is considered to be a kind of most possible method for realizing continuous nano-fibre industrialized production prepares function using the technology
Nanofiber is expected with good prospect.
The sharpest edges of electrospinning are that corresponding knot can be effectivelyed prepared out by the design and transformation of spinning header structure, single step
The polymer micro-nanometer fiber of structure feature, this is that the chemical synthesis process of various other " bottom-up " is impossible.Most
It the use of coaxial capillary metal sleeve is commonly that spinneret prepares core sheath structure nanofiber (Moghe AK and Gupta
BS. Co-axial electrospinning for nanofiber structures: Preparation and
applications. Polym. Rev. 2008;48:353-377.) received side by side with application left-right relation structure spinneret preparation
Rice fiber (Walther A and M ü ller AHE. Janus particles:synthesis, self-assembly,
physical properties, and applications. Chem. Rev.2013;113:5194-5261.).But base
In this concept, also more nanostructured products with labyrinth feature have to be developed.
Development of Nano-technology reduces the micro-or nano size of product merely to today to obtain the concept of relevant nanometer effectiveness
Gradually deflect away from mainstream.More attentions all concentrate on nano-device, complicated micro nano structure and relevant nanometer layer at present
In secondary structure-activity relationship.Structural integrity, micro nanometer fiber with labyrinth feature how are be effectivelyed prepared out, and is led to
It is both research hotspot and the micro manufacturing field and novel micro- of nanosecond science and technology that the structure feature for crossing fiber, which goes the function of designing them,
Nanometer product production institute key content to be solved.
The present invention is on the basis of test of many times, it then follows the behavioural characteristic of fluid and basic natural rule under high voltage electric field
Rule finds out a kind of same core different sheath microfluidic control spray head side by side, using spray head assembling electric spinning equipment, implements electrospinning processes,
Structural integrity, the same core of size uniformity different sheath nanofiber side by side can be effectivelyed prepared out with single step, be new structure nanometer function
Design, preparation and the large-scale production and application of energy material provide may.
Summary of the invention
For above-mentioned technical problem in the prior art, the present invention provides a kind of different sheath microfluidic control sprays side by side of same core
Head, device for spinning and spinning process, this same core different sheath microfluidic control spray head, device for spinning and spinning process side by side
Solve to prepare in the prior art same core side by side the complex process of different sheath structure nano fiber the technical issues of.
The present invention provides a kind of same core different sheath microfluidic control spray heads, an including total capillary, the first bending side by side
Capillary and the second tortuous capillary, the section at total capillary outlet are ellipse；The first bending capillary
Pipe includes a first straight line section and the first bending part, and the first straight line section is arranged in total capillary and abuts
The outlet end of total capillary, the first curved hairs are stretched out in the inner sidewall of total capillary, the outlet end of the first tortuous capillary
First bending part of tubule is pierced by from a side of total capillary；Second tortuous capillary includes a second straight line
The second straight line section of section and the second bending part, second tortuous capillary is arranged inside total capillary and penetrates first mao
It in the straightway of tubule, is stretched out from the outlet end of the first capillary, the lateral wall of second tortuous capillary is close to first
The inner sidewall close to total capillary middle section of capillary, the second bending part of second tortuous capillary is from total capillary
Another side of pipe is pierced by.
Further, the junction of the straightway of the second straight line section and the first capillary of second tortuous capillary
Sealed set.
Further, the outlet 0.2mm of total capillary, institute are stretched out in the outlet end of first tortuous capillary
The outlet 0.2mm of first tortuous capillary is stretched out in the outlet end for the second tortuous capillary stated.
Further, the length of total capillary is 70 mm, and the input end of total capillary is provided with one
Interface, spiral reinforcing rib is provided on the lateral wall of the interface, and the length of first tortuous capillary is 60
mm；The length of second tortuous capillary is 65 mm；It is total capillary interface, the first tortuous capillary, second curved
Bent capillary and total capillary junction are sealed using epoxy resin gluing.
Further, on the lateral wall of the tail end of the bending part of first tortuous capillary and the second tortuous capillary
It is provided with the protrusion of annular.
The present invention also provides a kind of high-voltage electrostatic spinning devices, including the first syringe pump, the first syringe, the second injection
Pump, the second syringe, third syringe pump, third syringe, fiber receiver board, high pressure generator and above-mentioned same core different sheath side by side
Microfluidic control spray head, first syringe are mounted in first syringe pump, first syringe and institute
The microfluidic control spray head connection stated, second syringe are mounted in second syringe pump, second note
The emitter microfluidic control spray head described by the first silica gel hose connection, the third syringe is mounted on described
In third syringe pump, the third syringe microfluidic control spray head described by the second silica gel hose connection, institute
The high pressure generator stated is connected with the microfluidic control spray head by conducting wire, and the lower end of the microfluidic control spray head is set
It is equipped with fiber receiver board.
The present invention also provides the method using above-mentioned electric spinning equipment preparation same core different sheath structure nano fiber side by side,
The intermediate spinning liquid of the first arrangement is added in first syringe, the spinning solution on second of one side is added in the second syringe
The spinning liquid of the third another side is added in third syringe for body, by high voltage electrostatic field, can single step effectively make
Standby same core out different sheath structure nano fiber side by side.
Further, the method for above-mentioned preparation same core different sheath structure nano fiber side by side, includes the following steps:
1) the step of preparation spinning solution, the ethyl alcohol that the first spinning solution is Eudragit E100 and phosphotungstic acid forms are molten
Liquid, in the ethanol solution, the mass percent concentration of Eudragit E100 is 13%, the mass percent of phosphotungstic acid
Concentration is 1%；Second spinning solution is the ethanol solution that Eudragit L100 and phosphotungstic acid form, in the ethanol solution,
The mass percent concentration of Eudragit L100 is 13%, and the mass percent concentration of phosphotungstic acid is 0.5%；Third spinning solution is
The Eudragit L100 ethanol solution that mass percent concentration is 13%；
2) resulting first, second, and third spinning solution of step 1) is added separately in corresponding syringe, is then turned on
First syringe pump, the second syringe pump and third syringe pump；
3) the sheath flow quantity for controlling the first syringe is 0.8 ml/h, the core flow quantity point of control second and third syringe
Not Wei 1.0 and 0.5 ml/h open high pressure generator, adjustment fiberboard receive distance, by voltage be upgraded to 14kV carry out electrospinning, i.e.,
Obtain multistage parallel construction nanofiber.
The principle of the present invention is: the specific structural features of different sheath microfluidic control spray head are to prepare corresponding construction to same core side by side
Nano material provides a macroscopical template, high-pressure electrostatic off field, by the interaction of high-voltage electrostatic field and fluid, in several millis
Liquid spinning dope is drawn into solid nano fiber clear in structure within second.On the other hand, spray outlet same core different sheath side by side
Fluid forms a round complete curve closing structure under high voltage electric field, on the one hand this closing structure is conducive to high voltage electric field
On the other hand uniform synchro-draw to three kinds of fluids keeps having enough contacts area between three kinds of fluids of arrangement, effectively
Ground prevents from separating caused by " identical charges repel each other " between fluid.Above-mentioned principle collective effect, it is ensured that high-pressure electrostatic off field, from macro
See accurate " duplication " of template to microcosmic three Room interconnection arrangement architecture feature nanofiber.
The present invention is compared with prior art, and technological progress is significant.Same core of the invention different sheath high-pressure electrostatic side by side
Spinning process application is simple and convenient to operate, is easily controllable, and it is different side by side to be effectively prepared out same core under high voltage electric field with single step
Sheath structure nano fiber, and extensive amplification production can be carried out by increasing spinneret quantity.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of same core of the invention different sheath microfluid electric injector side by side, the total capillary of 1-, 2-
One tortuous capillary, the second tortuous capillary of 3-, 4- connector, 5- bulge loop, 6- epoxy resin.
Fig. 2 is a kind of outlet shooting figure of same core of the invention different sheath microfluid electric injector side by side.
Fig. 3 is the structural representation containing same core of the invention more jet stream electric spinning equipments of different sheath microfluid electric injector side by side
Figure, 7- high pressure generator, the first syringe pump of 8-, the second syringe pump of 9-, 10- third syringe pump, 11- same core different sheath miniflow side by side
Body electric injector, 12- fiber receiver board, the first syringe of 13-, the second syringe of 14-, 15- third syringe, 16- first are high-elastic
Property silica gel hose；17- the second high resiliency silica gel hose.
Fig. 4 is the different sheath structure nano fiber scanning electron microscope electron microscope side by side of same core obtained by Application Example；
Fig. 5 is the different sheath structure nano fiber transmission electron microscope electron microscope side by side of same core obtained by Application Example.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of same core different sheath microfluidic control spray heads, an including total capillary side by side
1, the first tortuous capillary 2 and the second tortuous capillary 3；The section of the outlet end of total capillary 1 is ellipse；It is described
The first tortuous capillary 2 include a first straight line section and the first bending part, the first straight line section is arranged in described
In total capillary 1 and against the inner sidewall of total capillary 1, the outlet of total capillary 1 is stretched out in the outlet end of the first tortuous capillary 2
End, the first bending part of the first tortuous capillary 2 are pierced by from a side of total capillary 1；Second tortuous capillary 3
Including a second straight line section and the second bending part, the second straight line section of second tortuous capillary 3 is arranged in total capillary
1 inside of pipe simultaneously penetrates in the straightway of the first capillary 2, extends to outlet end from the first capillary inside 2, described second is curved
The lateral wall of bent capillary 3 is close to the inner sidewall by total 1 middle section of capillary of the first capillary 1, second bending
Second bending part of capillary 3 is pierced by from another side of total capillary 1.
Further, the connection of the straightway of the second straight line section and the first capillary 2 of second tortuous capillary 3
Locate sealed set.
Further, the outlet end 0.2 of total capillary 1 is stretched out in the outlet end of first tortuous capillary 2
0.2 mm of outlet end of first tortuous capillary 1 is stretched out in mm, the outlet end of second tortuous capillary 3.
Further, the length of total capillary 1 is 70 mm, and the input end of total capillary 1 is provided with one
A interface 4 is provided with spiral reinforcing rib, the length of first tortuous capillary 2 on the lateral wall of the interface 4
For 60 mm；The length of second tortuous capillary 3 is 65 mm；Total capillary 1,2 and of the first tortuous capillary
Second tortuous capillary 3 and 4 connection of interface are all made of 6 adhesive sealing of epoxy resin.
Further, on the lateral wall of the bending part tail end of first tortuous capillary 2 and the second tortuous capillary 3
It is provided with the protrusion 5 of annular, for connecting high resiliency silica gel hose.
Embodiment 2
A kind of high-voltage electrostatic spinning device of application spray head assembling, composition schematic diagram is as shown in figure 3,7- high pressure
Give birth to device, the first syringe pump of 8-, the second syringe pump of 9-, 10- third syringe pump, 11- same core different sheath microfluid electric injector, 12- side by side
Fiber receiver board, the first syringe of 13-, the second syringe of 14-, 15- third syringe, 16- the first high resiliency silica gel hose；
17- the second high resiliency silica gel hose.
Using with same core side by side different sheath microfluidic control spray head electric spinning equipment to three fluid streams implement electrospinning preparation,
Specific step is as follows: the first syringe 13 is mounted in the first syringe pump 8, and the first spinning liquid is added in syringe 13, note
Emitter 13 is directly connected to the interface end of same core different sheath microfluidic control spray head 11 side by side.Second syringe 14 is mounted on the second injection
In pump 9, the second spinning solution is added in syringe 9, spinning liquid is arranged side by side by the first high resiliency silica gel hose 16 importing same core
In the tortuous capillary 2 of different sheath microfluidic control spray head 11.Third syringe 15 is mounted in third syringe pump 10, in syringe
Third spinning liquid is added in 15, spinning liquid imports same core different sheath microfluid control side by side by the second high resiliency silica gel hose 17
In the tortuous capillary 3 of spray head 11 processed.Different sheath microfluidic control spray head 11 is direct by conducting wire side by side for high pressure generator 7 and same core
Connection is provided with a fiber receiver board 12 in 11 lower end of spray head, and receiving distance is 15cm；Receiving plate 12 is aluminium foil package
Hardboard, this receives plate earthing.
Application Example 1
Using a kind of high-voltage electrostatic spinning device implementation electrospinning of application spray head assembling as described in example 2, with preparation
Same core different sheath structure nano fiber side by side, steps are as follows:
(1), the preparation of spinning solution
First spinning solution, mass percent concentration are the ethanol solution of 13%Eudragit L100 and 1% phosphotungstic acid, are matched
Method processed is as follows: the phosphotungstic acid of the Eudragit E100 of 13 g and 1 g being added in the ethyl alcohol of 76 g, is stirred evenly i.e.
Obtain the ethanol solution of Eudragit E100 and 1% phosphotungstic acid that mass percent concentration is 13%；
Second spinning solution, mass percent concentration are the ethanol solution of 13%Eudragit L100 and 0.5% phosphotungstic acid,
Preparation method is as follows: the phosphotungstic acid of the Eudragit E100 of 13 g and 0.5 g being added in the ethyl alcohol of 76.5 g, is stirred
The ethanol solution of the Eudragit E100 and 0.5% phosphotungstic acid that are uniformly 13% up to mass percent concentration；
Third spinning solution, the Eudragit L100 ethanol solution that mass percent concentration is 13%, preparation method are as follows:
The Eudragit E100 of 13 g is added in the ethyl alcohol of 77 g, stirring evenly up to mass percent concentration is 13%
The ethanol solution of Eudragit E100；
1) resulting first, second, and third spinning solution of step (1) is added separately in corresponding syringe, is then turned on
First syringe pump, the second syringe pump and third syringe pump；
2) the sheath flow quantity for controlling the first syringe is 0.8 ml/h, the core flow quantity point of control second and third syringe
Not Wei 1.0 and 0.5 ml/h open high pressure generator, adjustment fiberboard receive distance be 15 cm, by voltage be upgraded to 14kV carry out
Electrospinning is to get multistage parallel construction nanofiber.
Application Example 2
Using field scan Electronic Speculum, to same core prepared by Application Example 1, different sheath structure nano fiber carries out surface spray side by side
It is observed after gold, as a result as shown in Figure 4.Prepared same core side by side collect uniformly and good line be presented by different sheath structure nano fiber
Character state, diameter are 710 ± 110 nm.Using high resolution transmission electron microscopy to prepared same core different sheath structure side by side
Nanofiber is observed, as a result as shown in figure 5, the left, center, right same core of nanofiber different sheath structure is clear in structure side by side, due to
Overlapping relation, core and two sheath portions arranged side by side are made of two gray portions, and core and 1 lap of sheath portion have maximum
Gray scale, and independent sheath portion 2 has minimum gray scale.
The above is only the citing of embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the technical principles of the invention, several improvement can also be made, these improvement also should be regarded as this
The protection scope of invention.
Claims (8)
1. a kind of same core different sheath microfluidic control spray head side by side, it is characterised in that: including a total capillary, the first bending capillary
Pipe and the second tortuous capillary, the section at total capillary outlet are ellipse；The first tortuous capillary packet
A first straight line section and the first bending part are included, the first straight line section is arranged in total capillary and against total hair
The outlet end of total capillary, the first tortuous capillary are stretched out in the inner sidewall of tubule, the outlet end of the first tortuous capillary
The first bending part be pierced by from a side of total capillary；Second tortuous capillary include second straight line section and
The second straight line section of second bending part, second tortuous capillary is arranged inside total capillary and penetrates the first capillary
First straight line section in, stretched out from the outlet end of the first capillary, the lateral wall of second tortuous capillary is close to first
The inner sidewall close to total capillary middle section of capillary, the second bending part of second tortuous capillary is from total capillary
Another side of pipe is pierced by.
2. a kind of same core according to claim 1 different sheath microfluidic control spray head side by side, it is characterised in that: described second
The junction sealed set of the first straight line section of the second straight line section and the first capillary of tortuous capillary.
3. a kind of same core according to claim 1 different sheath microfluidic control spray head side by side, it is characterised in that: described first
The outlet 0.2mm of total capillary, the outlet end of second tortuous capillary are stretched out in the outlet end of tortuous capillary
Stretch out the outlet 0.2mm of first tortuous capillary.
4. a kind of same core according to claim 1 different sheath microfluidic control spray head side by side, it is characterised in that: total hair
The length of tubule is 70 mm, and the input end of total capillary is provided with an interface, sets on the lateral wall of the interface
It is equipped with spiral reinforcing rib, the length of first tortuous capillary is 60 mm；The length of second tortuous capillary
Degree is 65 mm；Total capillary interface, the first tortuous capillary, the second tortuous capillary are adopted with total capillary junction
It is sealed with epoxy resin gluing.
5. a kind of same core according to claim 1 different sheath microfluidic control spray head side by side, it is characterised in that: described first
The protrusion of annular is provided on the lateral wall of the tail end of the bending part of tortuous capillary and the second tortuous capillary.
6. a kind of high-voltage electrostatic spinning device, it is characterised in that: including the first syringe pump, the first syringe, the second syringe pump,
Two syringes, third syringe pump, third syringe, fiber receiver board, high pressure generator and same core described in claim 1 are arranged side by side
Different sheath microfluidic control spray head, first syringe are mounted in first syringe pump, first syringe
It being connected with the microfluidic control spray head, second syringe is mounted in second syringe pump, and described the
The two syringes microfluidic control spray head described by the first silica gel hose connection, the third syringe are mounted on institute
In the third syringe pump stated, the third syringe microfluidic control spray described by the second silica gel hose connection
Head, the high pressure generator are connected with the microfluidic control spray head by conducting wire, the microfluidic control spray head
Lower end is provided with fiber receiver board.
7. utilizing the side of high-voltage electrostatic spinning device as claimed in claim 6 preparation same core different sheath structure nano fiber side by side
Method, it is characterised in that: the first spinning solution among the first arrangement is added in the first syringe, the is added in the second syringe
Second spinning solution on two kinds of one side, the interior third spinning solution that the third another side is added of third syringe, passes through high-voltage electrostatic field
Effect, can single step be effectively prepared out same core different sheath structure nano fiber side by side.
8. the method for preparation same core different sheath structure nano fiber side by side as claimed in claim 7, it is characterised in that including as follows
Step:
1) the step of preparation spinning solution, the first spinning solution are the ethanol solution that Eudragit E100 and phosphotungstic acid form,
In the ethanol solution, the mass percent concentration of Eudragit E100 is 13%, the mass percent concentration of phosphotungstic acid
It is 1%；Second spinning solution is the ethanol solution that Eudragit L100 and phosphotungstic acid form, in the ethanol solution,
The mass percent concentration of Eudragit L100 is 13%, and the mass percent concentration of phosphotungstic acid is 0.5%；Third spinning solution is
The Eudragit L100 ethanol solution that mass percent concentration is 13%；
2) resulting first, second, and third spinning solution of step 1) is added separately in corresponding syringe, is then turned on first
Syringe pump, the second syringe pump and third syringe pump；
3) the sheath flow quantity of the first syringe is controlled as 0.8 ml/h, and the core flow quantity of control second and third syringe is respectively
1.0 and 0.5 ml/h opens high pressure generator, and adjustment fiber receiver board receives distance, and voltage is upgraded to 14kV and carries out electrospinning, i.e.,
Obtain same core different sheath structure nano fiber side by side.
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| JPH0819570B2 (en) * | 1986-09-12 | 1996-02-28 | チッソ株式会社 | Heat-bondable composite fiber and method for producing the same |
| AU2011216200B2 (en) * | 2010-02-15 | 2016-09-08 | Cornell University | Electrospinning apparatus and nanofibers produced therefrom |
| CN103668485B (en) * | 2013-12-03 | 2016-03-16 | 大连海洋大学 | The Electrospun nano-fibers film of coaxial three floor height activity embedding biology enzymes and preparation method |
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| CN104611773B (en) * | 2015-01-19 | 2017-01-04 | 上海理工大学 | A kind of decentralized casing spinneret arranged side by side and application thereof |
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