CN117844143A - Fluoroplastic cable material and preparation method and application thereof - Google Patents
Fluoroplastic cable material and preparation method and application thereof Download PDFInfo
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- CN117844143A CN117844143A CN202311828771.5A CN202311828771A CN117844143A CN 117844143 A CN117844143 A CN 117844143A CN 202311828771 A CN202311828771 A CN 202311828771A CN 117844143 A CN117844143 A CN 117844143A
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- vinyl ether
- ether copolymer
- tetrafluoroethylene
- cable material
- aminosilane
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- 239000000463 material Substances 0.000 title claims abstract description 75
- 229920002313 fluoropolymer Polymers 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 24
- 229920001577 copolymer Polymers 0.000 claims abstract description 142
- 229920001774 Perfluoroether Polymers 0.000 claims abstract description 139
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000006229 carbon black Substances 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 5
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 5
- 239000002270 dispersing agent Substances 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims abstract description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 78
- 238000009832 plasma treatment Methods 0.000 claims description 72
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical group CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 claims description 31
- 238000001035 drying Methods 0.000 claims description 21
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical group [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 20
- 239000012298 atmosphere Substances 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 19
- 239000001301 oxygen Substances 0.000 claims description 19
- 229910052760 oxygen Inorganic materials 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 19
- 238000001291 vacuum drying Methods 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical group C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 claims description 4
- VTBPVFUOJWSMHY-UHFFFAOYSA-N 3-trimethylsilyloxypropan-1-amine Chemical compound C[Si](C)(C)OCCCN VTBPVFUOJWSMHY-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 230000001476 alcoholic effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 86
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 29
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 18
- 239000011261 inert gas Substances 0.000 description 18
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 18
- 239000012299 nitrogen atmosphere Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 8
- 238000009413 insulation Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- UIUXUFNYAYAMOE-UHFFFAOYSA-N methylsilane Chemical compound [SiH3]C UIUXUFNYAYAMOE-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- DWCJZTAKMBEIPD-UHFFFAOYSA-N OC(=O)C=C.CO[SiH](OC)OC Chemical compound OC(=O)C=C.CO[SiH](OC)OC DWCJZTAKMBEIPD-UHFFFAOYSA-N 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Organic Insulating Materials (AREA)
Abstract
The invention provides a fluoroplastic cable material, a preparation method and application thereof, wherein the cable material comprises 70-80 parts of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 8-12 parts of carbon black, 1-2 parts of dispersing agent, 1-2 parts of antioxidant and 4-6 parts of filler. The surface tension of the tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer can be improved by grafting the aminosilane on the surface, so that the adhesion effect of the tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer on moisture is reduced, and meanwhile, the internal porosity of the cable material prepared by the method can be greatly reduced, and the cable material can be used for a cable insulating layer in a high-temperature and high-humidity environment.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a fluoroplastic cable material and a preparation method thereof.
Background
Tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA) is a melt processed fluoroplastic having excellent heat resistance, chemical resistance and mechanical properties, which can be used in cables or cable insulation in some particular fields.
However, PFA has certain disadvantages, and compared with other conventional plastics, PFA has a higher melting point and a higher viscosity, and special processing equipment is generally required in the melt extrusion process, so that the cost of PFA is higher. Meanwhile, the surface energy of the PFA material is biased to the bottom, so that the PFA material has good surface hydrophilicity, the surface hydrophilicity makes the PFA material extremely susceptible to water vapor in the environment in the processing process, and finally, pores are easily formed in an extruded finished product, and the problem greatly limits the application of the PFA material in some high-humidity environments.
In view of the above, it is an urgent technical problem to provide a PFA fluoroplastic cable material capable of reducing surface void defects.
Disclosure of Invention
In view of the above, the invention provides a fluoroplastic cable material, a preparation method and application thereof, and aims to reduce the porosity in the fluoroplastic cable.
The technical scheme of the invention is realized as follows: the invention provides a fluoroplastic cable material, which comprises the following raw materials in parts by weight: 70-80 parts of aminosilane modified tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer, 8-12 parts of carbon black, 1-2 parts of dispersing agent, 1-2 parts of antioxidant and 4-6 parts of filler.
In some embodiments, the method of preparing an aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer comprises the steps of:
(1) Crushing tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer to an average granularity of 2-3.5mm;
(2) Heating the crushed tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer to 120-140 ℃ for vacuum drying, and introducing oxygen plasma for surface plasma treatment for 30-60s after the tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer is dried to constant weight;
(3) Preparing an ethanol solution of aminosilane, soaking the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer subjected to plasma treatment in the ethanol solution of aminosilane for 1-3min, filtering and drying to constant weight to obtain the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
In some embodiments, the aminosilane is 3-aminopropyl trimethoxysiloxane or 3-aminopropyl trimethylsiloxane.
In some embodiments, the mass concentration of the aminosilane in the ethanol solution is 4-8%.
In some embodiments, the dispersant is sodium dodecyl sulfate.
In some embodiments, the antioxidant is triphenylphosphine acid.
In some embodiments, the filler is talc.
On the other hand, the invention also provides a preparation method of the fluoroplastic cable material, which comprises the following steps:
step one, weighing the raw materials according to parts by weight, drying to constant weight, then adding into a kneader, heating to 260-270 ℃ under inert atmosphere, and stirring and mixing at 20-30rpm for 10-30min;
extruding and granulating the mixed material by an extruder to obtain the cable material.
The fluoroplastic cable material provided by the invention can be used for an insulating layer of a high-temperature furnace cable.
Compared with the prior art, the fluoroplastic cable material has the following beneficial effects:
the invention adopts the aminosilane to carry out surface modification treatment on the pelletized tetrafluoroethylene-perfluor alkoxy vinyl ether copolymer, thereby not only reducing the surface tension of the tetrafluoroethylene-perfluor alkoxy vinyl ether copolymer and reducing the amount of water vapor mixed in the processing process, but also reducing the porosity in the material after extrusion molding, and simultaneously, after the surface modification of the aminosilane, the viscosity of the tetrafluoroethylene-perfluor alkoxy vinyl ether copolymer is reduced to a certain extent, the extrusion process is smoother, and the porosity of the surface is lower.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the invention belong. If the definitions set forth in this section are contrary to or otherwise inconsistent with the definitions set forth in the patents, patent applications, published patent applications and other publications incorporated herein by reference, the definitions set forth in this section are preferentially set forth in the definitions set forth herein.
Example 1
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 2
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with an average particle size of 2.5mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 3
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 3mm are prepared, medium is dried in a vacuum drying oven at 120 ℃ to constant weight, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 4
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 3.5mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under the nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 5
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are dried in a vacuum drying oven at the temperature of 140 ℃ until the weight is constant, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under the nitrogen atmosphere, and the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are subjected to plasma treatment for 60s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 6
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 6%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 7
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 8%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 8
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 2min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 9
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 3min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 10
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
800g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 120g of carbon black, 20g of sodium dodecyl sulfate, 20g of triphenyl phosphoric acid and 60g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 270 ℃ under inert gas atmosphere, and stirred and mixed for 10min at the rotating speed of 30 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Example 11
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethylsiloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 1
Preparation of methylsilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of an ethanol solution of methyltrimethoxysilane with the mass concentration of 4%, soaking tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of methyltrimethoxysilane for 1min, filtering, and drying in vacuum until the weight is constant, thereby obtaining the methylsilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 2
Preparation of an acrylic silane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of an ethanol solution of trimethoxy silane acrylate with the mass concentration of 4%, soaking tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of trimethoxy silane acrylate for 1min, filtering, and drying in vacuum until the weight is constant, thereby obtaining the methylsilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 3
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 1mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 4
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 4mm are prepared, medium is dried in a vacuum drying oven at 120 ℃ to constant weight, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 4%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 5
700g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 6
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of 3-aminopropyl trimethoxy siloxane ethanol solution with the mass concentration of 3%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the 3-aminopropyl trimethoxy siloxane ethanol solution for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
Comparative example 7
Preparation of aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer:
1000g of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles with the average particle size of 2mm are prepared, medium is dried in a vacuum drying oven to constant weight at 120 ℃, then the dried tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles are transferred into a plasma treatment cavity, oxygen plasma is introduced into the plasma treatment cavity under nitrogen atmosphere to carry out plasma treatment on the surfaces of the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles for 30s, and stirring is carried out in the treatment process.
Preparing 1L of ethanol solution of 3-aminopropyl trimethoxy siloxane with the mass concentration of 10%, immersing tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer particles subjected to surface plasma treatment in the ethanol solution of 3-aminopropyl trimethoxy siloxane for 1min, filtering and drying in vacuum until the weight is constant, thus obtaining the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
700g of aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, 80g of carbon black, 10g of sodium dodecyl sulfate, 10g of triphenyl phosphoric acid and 40g of talcum powder are taken, dried to constant weight, added into a kneader, heated to 260 ℃ under inert gas atmosphere, and stirred and mixed for 30min at 20 rpm.
And extruding and granulating the mixed material after the mixing treatment by using an extruder to obtain the cable material.
The cable materials prepared in the examples and the comparative examples are used for basic production of cable insulation layers, and the tensile yield strength and the maximum traction composition of the cable material are tested according to GB/T8804.1, and meanwhile, the insulation layers of the obtained cables are subjected to porosity test by a water saturation method, and the test results are as follows:
as can be seen from the data of the above examples, the cable material prepared by the preparation method of the fluoroplastic cable material provided by the invention has good mechanical properties, the porosity of the cable material is greatly reduced, and the cable material prepared by the cable material can be used for cable insulation layers in high-humidity and high-temperature environments.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
1. The fluoroplastic cable material is characterized by comprising the following raw materials in parts by weight: 70-80 parts of aminosilane modified tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer, 8-12 parts of carbon black, 1-2 parts of dispersing agent, 1-2 parts of antioxidant and 4-6 parts of filler.
2. The fluoroplastic cable material of claim 1, wherein the aminosilane-modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer is prepared by the steps of:
(1) Crushing tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer to an average granularity of 2-3.5mm;
(2) Heating the crushed tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer to 120-140 ℃ for vacuum drying, and introducing oxygen plasma for surface plasma treatment for 30-60s after the tetrafluoroethylene-perfluoro alkoxy vinyl ether copolymer is dried to constant weight;
(3) Preparing an ethanol solution of aminosilane, soaking the tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer subjected to plasma treatment in the ethanol solution of aminosilane for 1-3min, filtering and drying to constant weight to obtain the aminosilane modified tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer.
3. Fluoroplastic cable material according to claim 2, characterized in that the aminosilane is 3-aminopropyl trimethoxysiloxane or 3-aminopropyl trimethylsiloxane.
4. Fluoroplastic cable material according to claim 2, characterized in that the mass concentration of the alcoholic solution of aminosilane is 4-8%.
5. The fluoroplastic cable material of claim 1, wherein the dispersant is sodium dodecyl sulfate.
6. The fluoroplastic cable material of claim 1, wherein the antioxidant is triphenylphosphine acid.
7. The fluoroplastic cable material of claim 1, wherein the filler is talc.
8. A method for preparing a fluoroplastic cable material according to any one of claims 1 to 7, characterized by comprising the steps of:
step one, weighing the raw materials according to parts by weight, drying to constant weight, then adding into a kneader, heating to 260-270 ℃ under inert atmosphere, and stirring and mixing at 20-30rpm for 10-30min;
extruding and granulating the mixed material by an extruder to obtain the cable material.
9. Use of the fluoroplastic cable material according to any one of claims 1 to 7 in a high temperature furnace cable.
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