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A kind of polymer fiber doped with fluorine on the surface and its preparation method

A polymer and surface doping technology, applied in the field of fiber materials, can solve problems such as increasing complexity, and achieve the effect of universality, simple and efficient modification methods, and fast and efficient surface doping with halogen modification.

Active Publication Date: 2020-10-02
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has achieved good technical results, it is still inevitable to use fluorine-containing gases, which increases the complexity of the method

Method used

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  • A kind of polymer fiber doped with fluorine on the surface and its preparation method
  • A kind of polymer fiber doped with fluorine on the surface and its preparation method
  • A kind of polymer fiber doped with fluorine on the surface and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Using polyacrylonitrile as the raw material and N,N-dimethylformamide (DMF) as the solvent, the spinning stock solution was prepared according to the conventional ratio, and electrospinning was carried out, and a flat-woven 35-mesh stainless steel metal mesh was used as the receiving device to obtain Bulk polyacrylonitrile nanofibers.

[0035] see figure 1, place the metal mesh 1 loaded with nanofibers on the top of a polytetrafluoroethylene film 2 of the same size and a thickness of 1 mm, keep the distance between the two at 0.5 mm, and place the polytetrafluoroethylene film in a plasma generator on electrode 3. Subsequently, the AC power was turned on, and under the condition of 10Pa, argon was used as the discharge gas to uniformly glow discharge to generate glow plasma 4, and the treatment was performed at a power of 50W for 60s to prepare polyacrylonitrile nanofibers doped with fluorine on the surface. The invention utilizes the metal mesh and the plasma generati...

Embodiment 2

[0038] Using polyvinylpyrrolidone as the raw material and deionized water as the solvent, the spinning stock solution was prepared according to the conventional ratio, and electrospinning was performed, and the flat-woven 50-mesh nickel metal mesh was used as the receiving device to obtain bulk polyvinylpyrrolidone nanofibers. Place the metal mesh loaded with bulk nanofibers on top of a polytetrafluoroethylene film of the same size and thickness of 2.5 mm, keep the distance between the two at 0.3 mm, and place it on the plasma generating electrode. Then, turn on the radio frequency power supply, under the condition of 30Pa, use helium as the discharge gas to generate a uniform glow discharge, and treat it under the power of 20W for 300s, that is, the polymer nanofibers doped with fluorine on the surface are prepared. After calculation and analysis, the proportion of fluorine element to the total elements is 35%.

Embodiment 3

[0040] Using polyamide as the raw material and formic acid as the solvent, the spinning stock solution was prepared according to the conventional ratio, and electrospinning was carried out, and the plain-woven 20-mesh copper metal mesh was used as the receiving device to obtain bulk polyamide nanofibers. The metal mesh loaded with bulk nanofibers was placed on a polytetrafluoroethylene film of the same size and a thickness of 2 mm, keeping the distance between the two at 1 mm, and placed on the plasma generating electrode. Subsequently, the DC power supply was turned on, and under the condition of 100Pa, nitrogen gas was used as the discharge gas to generate a uniform glow discharge, and the treatment was performed at a power of 80W for 180s, and the polymer nanofibers doped with fluorine on the surface were prepared. After calculation and analysis, the proportion of fluorine element to the total elements is 12%.

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Abstract

The invention discloses a surface fluorine-doped polymer fiber and a preparation method thereof. A ratio of fluorine element to total element in the surface fluorine-doped polymer fiber can be controlled at 5%-50%. According to the invention, a plasma discharge technology is utilized to perform surface fluorine-doping modification on a fluorine-free polymer fiber, thereby breaking through a limitation that the conventional surface fluorine-doped polymer nanofiber needs to be prepared from a halogen-containing polymer precursor; controllable preparation of the surface fluorine-doped polymer nanofiber is realized by adjusting a receiving device and designing subsequent plasma modification in an electrospinning process and utilizing interaction of a discharge plasma, the polymer fiber and aninsulating polymer film without using a fluorine-containing chemical reagent, thereby significantly improving an industrial value of the polymer nanofiber and effectively expanding application of thepolymer fiber in new fields.

Description

technical field [0001] The invention relates to the field of fiber materials, in particular to a polymer fiber doped with fluorine on the surface and a preparation method thereof. Background technique [0002] As a new type of fiber material, nanofibers have attracted extensive attention from the industry due to their high porosity, large specific surface area, and quantum size effect. , energy devices and other fields have shown great application prospects. With the continuous development of nanofiber materials in various application fields, the preparation and modification technologies of nanofibers have also been rapidly developed and innovated. [0003] In order to further expand the application field of nanofibers and enhance the surface and interface properties of nanofibers, various modification strategies have been applied and developed, such as fluoropolymer nanofibers, which have excellent electrical properties, unique low surface energy, broad Generally speaking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F11/06D01F11/08D01F11/02D01F6/18D01F6/26D01F6/60D01F6/14D01F6/66D01F4/02
CPCD01F4/02D01F6/14D01F6/18D01F6/26D01F6/60D01F6/66D01F11/02D01F11/06D01F11/08
Inventor 李佳高明高源鸿易亚黄逸凡喻学锋
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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