CN107099107B - A kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland - Google Patents
A kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland Download PDFInfo
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- CN107099107B CN107099107B CN201710431537.7A CN201710431537A CN107099107B CN 107099107 B CN107099107 B CN 107099107B CN 201710431537 A CN201710431537 A CN 201710431537A CN 107099107 B CN107099107 B CN 107099107B
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- 239000000835 fiber Substances 0.000 title claims abstract description 57
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 54
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 32
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 27
- 241000700143 Castor fiber Species 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000011017 operating method Methods 0.000 abstract 1
- 238000007493 shaping process Methods 0.000 abstract 1
- 210000002268 wool Anatomy 0.000 abstract 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 34
- 239000004917 carbon fiber Substances 0.000 description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 34
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 229910000077 silane Inorganic materials 0.000 description 11
- 229910000975 Carbon steel Inorganic materials 0.000 description 4
- 239000010962 carbon steel Substances 0.000 description 4
- 229920006231 aramid fiber Polymers 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/001—Conductive additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of preparation methods of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland, it is related to material machine-shaping field, the ptfe composite that fiber is orientated to a high degree in the plane perpendicular to compression aspect can be made.The present invention is on the basis of the method for tradition preparation, and change cold moudling process, including following operating procedure: (1) bat wool is surface-treated；(2) fiber and polytetrafluoroethylene powder are uniformly mixed；(3) cold moudling is carried out in a mold, is repeatedly fed in batches；(4) it is sintered in sintering furnace by certain sintering degree.That the processing is simple is easy by the present invention, has a extensive future.
Description
Technical field
The invention belongs to material material molding technology fields more particularly to a kind of two dimension of fibre filling polytetrafluoroethyland to take
To the preparation method of anisotropic composite material.
Background technique
The characteristic of composite material depends on the micro-structure of its matrix, the performance of filler and their formation.Macromolecule is compound
In material binary system, if wherein a phase (for example, thermal conductivity high a phase) is evenly dispersed but without any orientation, opposite
The promotion of thermal conductivity is very limited under low filer content.When filer content is very high, ideal conductive and heat-conductive can achieve
Rate, but the good characteristic to lose macromolecule itself and raising cost is costs.However one hand down hot-fluid when thermal conductivity is high
Direction is parallel and forms perforative structure, and thermal conductivity can be promoted significantly.Therefore, this anisotropic structure is to reduce filler
Content but a kind of effective ways for assigning polymer filler function.The ptfe composite of fiber filling is in many fields
It is all widely used, but what is applied at present is all the composite material made of common cold pressing, sintering process, is all each
To the same sex, the effectiveness of functional stuffing can not be played to the greatest extent.
Summary of the invention
The present invention provides a kind of preparation sides of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland
Method improves the cold moudling process of classical ptfe composite preparation method, can prepare to a certain degree
The anisotropic ptfe composite of two-dimensional orientation, it is different according to the characteristic of fiber, can be improved in some plane
Or wearability, electric conductivity, thermal conductivity, mechanical property on certain directions etc..
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland, including following behaviour
Make step:
A. fiber is surface-treated；
B. treated fiber and polytetrafluoroethylene powder are uniformly mixed, and obtain the mixture of fiber and polytetrafluoroethylene (PTFE)；
C. fiber and teflon mixture are subjected to cold moudling in a mold, repeatedly fed in batches, every time
It is once pressurizeed after charging, after for the last time adding material, pressure is added to the value of process stipulation, and keep pressure；
D. it is sintered in sintering furnace.
Fiber described in above step is staple fiber；Fiber described in step b and polytetrafluoroethylene (PTFE) press the volume of fiber
Percentage is uniformly mixed for 5%-35%；Each feeding quantity described in step c makes thick flake thickness degree after pressurization increase 2-5 millimeters,
The pressure value pressurizeed after charging every time is 5-8MPa, and the dwell time is not less than 5 seconds, the pressure process specified value of last time pressurization
For 15-40MPa, the dwell time is not less than 10 minutes.
The beneficial effects of the invention are as follows preparing the anisotropic ptfe composite of a degree of two-dimensional orientation,
It is different according to the characteristic of fiber, it can be improved in some plane or wearability, electric conductivity, mechanical property on certain directions etc..
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described.
Fig. 1 is test bars machining sketch chart (compression aspect when P is material cold pressing).
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Present invention is further described in detail for formula, and embodiment 1 is traditional preparation method, as a comparison embodiment, and others are implemented
Example all uses preparation method of the invention.
Embodiment 1
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, disposably will
Mold is added in mixture, slowly applies pressure to 30MPa, and pressure maintaining 15 minutes, heating sintering finally kept the temperature 3 hours at 375 DEG C,
Cool down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 2
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, be forced into 10MPa after being added every time, pressure maintaining 5 seconds, each feeding quantity increased thick flake thickness degree
Add 2 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure, most
3 hours are kept the temperature at 375 DEG C eventually, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 3
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, be forced into 10MPa after being added every time, pressure maintaining 5 seconds, charging was so that thick flake thickness degree increases every time
5 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure, finally
3 hours are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 4
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is 5%,
After fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and fiber are uniformly mixed, it will by technique of the invention
Mixture is added portionwise, and 10MPa is forced into after being added every time, pressure maintaining 5 seconds, charging was so that thick flake thickness degree increases by 2 millimeters of left sides every time
It is right.Last time mixture slowly applies pressure to 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure, finally
3 hours are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 5
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
35%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, be forced into 10MPa after being added every time, pressure maintaining 5 seconds, charging was so that thick flake thickness degree increases every time
2 millimeters or so.Last time mixture slowly applies pressure to 30MPa after adding, pressure maintaining 15 minutes, heat up and burn by established procedure
Knot finally keeps the temperature 3 hours at 375 DEG C, cools down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 6
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects stainless steel fibre, stainless steel fibre percent by volume
It is 8%, after fiber is using alkali cleaning, pickling, silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and fiber is uniformly mixed, pressed
Mixture is added portionwise technique of the invention, 10MPa is forced into after being added every time, pressure maintaining 5 seconds, charging was so that thick flake thickness every time
Degree increases by 2 millimeters or so.Last time mixture slowly applies pressure to 30MPa after adding, and pressure maintaining 15 minutes, by established procedure
Heating sintering, finally keeps the temperature 3 hours at 375 DEG C, cools down with furnace.Test bars, such as Fig. 1 are processed by different directions.
See Table 1 for details for data in above-described embodiment 1-6.
The tensile strength ratio of 1 embodiment test specimens of table and conductive ratio
| Embodiment | The tensile strength of batten 1 and batten 2 ratio | The conductivity of batten 1 and batten 2 ratio |
| 1 | 1.27 | 1.79 |
| 2 | 1.87 | 7.1 |
| 3 | 1.76 | 6.6 |
| 4 | 1.09 | 5.8 |
| 5 | 1.56 | 21 |
| 6 | 1.77 | 9.9 |
The test data of 1-6 is it is found that the fiber reinforcement polytetrafluoroethylene (PTFE) of traditional handicraft processing is compound through the foregoing embodiment
Fiber only has slight orientation in material, and the tensile strength and conductivity for showing as the test bars of different directions cutting have
Difference；And the degree of orientation of Fiber In Composite Material prepared by the present invention is used to be substantially higher much, show as different directions cutting
Test bars tensile strength and conductivity have apparent difference.The test data of 2-3 is it is found that pass through through the foregoing embodiment
Reduce the amount of single charge to reduce increased thickness every time and the degree of orientation of fiber can be improved, but it is very few to feed every time,
Increase obviously to upper bring difficulty is operated.
In addition to above embodiments, there are also following some embodiments by the present invention.
Embodiment 7
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, every time be added after be forced into 10MPa, pressure maintaining 10 seconds, each feeding quantity made thick flake thickness degree
Increase by 2 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure,
3 hours finally are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 8
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, every time be added after be forced into 10MPa, pressure maintaining 20 seconds, each feeding quantity made thick flake thickness degree
Increase by 2 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure,
3 hours finally are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 9
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, every time be added after be forced into 10MPa, pressure maintaining 30 seconds, each feeding quantity made thick flake thickness degree
Increase by 2 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 15 minutes, heat up and be sintered by established procedure,
3 hours finally are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 10
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects chopped carbon fiber, and carbon fiber percent by volume is
20%, after carbon fiber is using silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon fiber are uniformly mixed, by the present invention
Technique mixture is added portionwise, every time be added after be forced into 10MPa, pressure maintaining 10 seconds, each feeding quantity made thick flake thickness degree
Increase by 2 millimeters or so.Last time mixture is forced into 30MPa after adding, pressure maintaining 20 minutes, heat up and be sintered by established procedure,
3 hours finally are kept the temperature at 375 DEG C, is cooled down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 11
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects the carbon steel fiber that is chopped, carbon steel fiber percent by volume
It is 25%, after carbon steel fiber is using alkali cleaning, pickling, silane resin acceptor kh-550 processing, polytetrafluoroethylene powder and carbon steel fiber is mixed
It closes uniformly, mixture is added portionwise by technique of the invention, 10MPa is forced into after being added every time, pressure maintaining 10 seconds, is fed every time
Amount is so that thick flake thickness degree increases by 2 millimeters or so.Last time mixture is forced into 30MPa after adding, and pressure maintaining 15 minutes, by regulation
Temperature programming sintering, finally keeps the temperature 3 hours at 375 DEG C, cools down with furnace.Test bars, such as Fig. 1 are processed by different directions.
Embodiment 12
Polytetrafluoroethylene (PTFE) selects fine polytetrafluoroethylpowder powder, and fiber selects the aramid fiber that is chopped, aramid fiber percent by volume
It is 20%, polytetrafluoroethylene powder and aramid fiber is uniformly mixed, mixture is added portionwise by technique of the invention, adds every time
10MPa is forced into after entering, pressure maintaining 10 seconds, each feeding quantity made thick flake thickness degree increase by 2 millimeters or so.Last time mixture adds
It is forced into 30MPa after complete, pressure maintaining 15 minutes, heats up and is sintered by established procedure, finally keep the temperature 3 hours at 375 DEG C, cool down with furnace.
Test bars, such as Fig. 1 are processed by different directions.
The technical means disclosed in the embodiments of the present invention is not limited to the technical means disclosed in the above technical means, and further includes
Technical solution consisting of any combination of the above technical features.
Claims (6)
1. a kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland, which is characterized in that
Include:
A. fiber is surface-treated；
B. treated fiber and polytetrafluoroethylene powder are uniformly mixed, and obtain the mixture of fiber and polytetrafluoroethylene (PTFE)；
C. fiber and teflon mixture are subjected to cold moudling in a mold, repeatedly fed in batches, is fed every time
After once pressurizeed, after for the last time adding material, pressure is added to the value of process stipulation, and keep pressure；
D. it is sintered in sintering furnace.
2. the preparation side of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland described in accordance with the claim 1
Method, which is characterized in that fiber is staple fiber.
3. the system of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland according to claim 1 or 2
Preparation Method, which is characterized in that fiber described in step b and polytetrafluoroethylene (PTFE) are that 5%-35% is mixed by the percent by volume of fiber
Uniformly.
4. the system of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland according to claim 1 or 2
Preparation Method, which is characterized in that each feeding quantity described in step c makes thick flake thickness degree after pressurization increase 2-5 millimeters.
5. the system of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland according to claim 1 or 2
Preparation Method, which is characterized in that the pressure value pressurizeed after feeding every time described in step c is 5-8MPa, and the dwell time is not less than 5
Second.
6. the system of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland according to claim 1 or 2
Preparation Method, which is characterized in that pressure process specified value described in step c is 15-40MPa, and the dwell time is not less than 10 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431537.7A CN107099107B (en) | 2017-06-09 | 2017-06-09 | A kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431537.7A CN107099107B (en) | 2017-06-09 | 2017-06-09 | A kind of preparation method of the two-dimensional orientation anisotropic composite material of fibre filling polytetrafluoroethyland |
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| Publication Number | Publication Date |
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| CN107099107A CN107099107A (en) | 2017-08-29 |
| CN107099107B true CN107099107B (en) | 2019-08-20 |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0248446A3 (en) * | 1986-06-06 | 1990-01-03 | E.I. Du Pont De Nemours And Company | Anisotropic, liquid crystalline, polytetrafluoroethylene and tetrafluoroethylene copolymer aqueous dispersions |
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