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Preparation method of graphene-coated carbon-doped pi composite conductive nanofiber filament yarn

A nanofiber and composite conductive technology, which is applied in the direction of cellulose/protein conjugated artificial filament, fiber treatment, filament/thread forming, etc., can solve the problem of poor hand feeling, inability to apply high-grade conductive heating clothing fabrics, poor compatibility, etc. question

Active Publication Date: 2020-11-03
JIANGXI ADVANCED NANOFIBER S&T CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between graphene and polyimide is relatively poor, and the conductive performance of the prepared long yarn is not good enough, and the hand feel is poor, so it cannot be applied to the preparation of high-grade conductive heating clothing fabrics, and the application field is narrow.

Method used

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  • Preparation method of graphene-coated carbon-doped pi composite conductive nanofiber filament yarn
  • Preparation method of graphene-coated carbon-doped pi composite conductive nanofiber filament yarn
  • Preparation method of graphene-coated carbon-doped pi composite conductive nanofiber filament yarn

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preparation example Construction

[0025] What the first aspect of the present invention provides is the preparation method of graphene-coated carbon-doped PI composite conductive nanofiber filament yarn, and the steps include at least:

[0026] (1) preparing polyamic acid / hydroxyalkyl cellulose blended spinning solution;

[0027] (2) Electrospinning prepares fiber felt and / or nonwoven fabric;

[0028] (3) impregnating the dispersion liquid of graphene, drying, cutting into strips;

[0029] (4) heating and drawing to prepare nanofiber oriented tow;

[0030] (5) Twisting to prepare graphene-coated carbon-doped PI composite conductive nanofiber long yarn;

[0031] Wherein the thickness of the graphene is 1-10 layers; the mass concentration of the graphene in the dispersion liquid is 1.0-5.0%.

[0032] The PI mentioned in the present invention is the abbreviation of polyimide.

[0033] In some embodiments, the preparation method of the graphene-coated carbon-doped PI composite conductive nanofiber long yarn de...

Embodiment 1

[0081] The preparation method of graphene-coated carbon-doped PI composite conductive nanofiber long yarn, the steps include:

[0082] (1) After the dianhydride and diamine monomers are purified, they are added to the polymerization reactor together with the solvent, stirred and reacted for a period of time to obtain a polyamic acid solution, and mechanically mixed with the hydroxyalkyl cellulose solution to prepare a polyamide Acid / hydroxyalkyl cellulose blended spinning solution;

[0083] (2) Electrospinning the polyamic acid / hydroxyalkyl cellulose blended spinning solution in a high-voltage electric field, and using a stainless steel mesh belt as a collector to collect the polyamic acid / hydroxyalkyl cellulose electrospun fiber mat;

[0084] (3) The polyamic acid / hydroxyalkyl cellulose electrospun nanofiber mat is impregnated with a dispersion of graphene, dried and cut into strips;

[0085] (4) Preparing nanofiber oriented tows by heating, drawing, imidizing and carbonizin...

Embodiment 2

[0089] The preparation method of graphene-coated carbon-doped PI composite conductive nanofiber long yarn, the steps include:

[0090] (1) After the dianhydride and diamine monomers are purified, they are added to the polymerization reactor together with the solvent, stirred and reacted for a period of time to obtain a polyamic acid solution, and mechanically mixed with the hydroxyalkyl cellulose solution to prepare a polyamide Acid / hydroxyalkyl cellulose blended spinning solution;

[0091] (2) Electrospinning the polyamic acid / hydroxyalkyl cellulose blended spinning solution in a high-voltage electric field, and using a stainless steel mesh belt as a collector to collect the polyamic acid / hydroxyalkyl cellulose electrospun fiber mat;

[0092] (3) The polyamic acid / hydroxyalkyl cellulose electrospun nanofiber mat is impregnated with a dispersion of graphene, dried and cut into strips;

[0093] (4) preparing nanofiber orientation tows by heating, drawing, imidizing and carboni...

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Abstract

The invention relates to the field of preparation of polyimide nanofibers, and provides a preparation method of a graphene-coated carbon-doped PI composite conductive nanofiber long yarn. The method at least comprises the steps that (1) a polyamic acid / hydroxyalkyl cellulose blended spinning solution is prepared; (2) a fiber mat and / or nonwoven fabric are / is prepared through electrospinning; (3) the fiber mat and / or nonwoven fabric are / is impregnated in a dispersion solution of graphene, dried, and cut into long strips; (4) heating and drafting are carried out to prepare a nanofiber orientation tow; (5) twisting is carried out to prepare the graphene-coated carbon-doped PI composite conductive nanofiber long yarn, wherein the thickness of the graphene is 1-10 layers, and the graphene massconcentration in the dispersion solution is 1.0-5.0%.

Description

technical field [0001] The invention relates to the field of preparation of polyimide nanofibers, in particular to graphene-coated carbon-doped PI composite conductive nanofiber long yarns, preparation methods and applications. Background technique [0002] Graphene is a new type of inorganic material made of cheap graphite. Its ultimate modulus is 1.01TPa and its ultimate strength is 116GPa, which is equivalent to that of single-walled carbon nanotubes (SWCNT). In addition, graphene is light in weight, Good thermal conductivity, large specific surface area, and excellent electron transport properties. A series of advantages of graphene make it have bright application prospects in graphene nano-polymer composite materials, electronic transport devices, single-electron transistors, superconducting materials, etc. The use of graphene and matrix polymers to prepare fiber composite materials can significantly improve the properties of fiber materials, such as improving physical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02G3/02D01D5/00D04H1/728D06M11/74D01F8/16D01F8/02
CPCD01D5/0015D01F8/02D01F8/16D02G3/02D04H1/728D06M11/74
Inventor 侯豪情程楚云欧阳文袁梦杰王煜明侯翔宇
Owner JIANGXI ADVANCED NANOFIBER S&T CO LTD