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Electrospinning carbon hybrid polyimide ultra-short nanofiber and preparation method thereof

A polyimide and nanofiber technology, applied in the chemical characteristics of fibers, circuits, electrical components, etc., can solve the problems of easily broken wires, uneven fiber lengths, affecting thermal conductivity and electrical conductivity, and achieve uniform fiber lengths. , good dispersion, high degree of orientation effect

Active Publication Date: 2019-08-30
JIANGXI ADVANCED NANOFIBER S&T CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the conductive modification of polyimide mainly focuses on adding conductive fillers to raw materials, and obtaining polyimide conductive materials through polymerization, or using blending methods to obtain polyimide conductive materials, although it is possible to obtain polyimide conductive materials. Polyimide material with good conductivity, but it has certain defects when making high-performance composite materials. For example, the carbon content in the obtained carbon hybrid fiber is unevenly distributed, which affects thermal conductivity and electrical conductivity. It is obtained by blending with graphite The carbon-doped fibers do not have a high degree of orientation, uneven mechanical properties, and tend to break; Dispersion in the material; or the length of the fiber is uneven, resulting in uneven performance of the resulting composite material. Therefore, it is necessary to provide a carbon hybrid polyimide ultra-short fiber with uniform carbon content, uniform length, and good dispersion performance. Material

Method used

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  • Electrospinning carbon hybrid polyimide ultra-short nanofiber and preparation method thereof
  • Electrospinning carbon hybrid polyimide ultra-short nanofiber and preparation method thereof
  • Electrospinning carbon hybrid polyimide ultra-short nanofiber and preparation method thereof

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preparation example Construction

[0032] A second aspect of the present invention provides a method for preparing the carbon hybrid polyimide ultra-short nanofibers, comprising the steps of:

[0033] (1) Electrospinning the solution of polyamic acid and hydroxyalkyl cellulose blend to form fiber nonwoven fabric;

[0034] (2) cut into strips;

[0035] (3) carbonization;

[0036] (4) Cutting.

[0037] In one embodiment, the preparation method of polyamic acid and hydroxyalkyl cellulose blend solution is as follows:

[0038] (1) Put tetraacid dianhydride monomer, diamine monomer and polar solvent in a reaction kettle, and react at 0-30°C for 1-10 hours to obtain a polyamic acid solution;

[0039] (2) Add hydroxyalkyl cellulose into the polyamic acid solution, mechanically stir and dissolve it evenly at 0-30°C, and dilute the solution with N,N-dimethylacetamide to an absolute viscosity of 1.5-5.5Pa.S, To obtain a blend solution of polyamic acid and hydroxyalkyl cellulose;

[0040] The weight ratio of the tota...

Embodiment 1

[0062] Embodiment 1 of the present invention provides a carbon hybrid polyimide ultra-short nanofiber, the raw material of which includes polyamic acid and hydroxyalkyl cellulose, and the weight ratio of polyamic acid and hydroxyalkyl cellulose is 5:1 ;

[0063] The hydroxyalkyl group in hydroxyalkylcellulose is hydroxymethyl;

[0064] The raw materials for the preparation of polyamic acid include tetraacid dianhydride monomers and diamine monomers, and the molar ratio of tetraacid dianhydride monomers to diamine monomers is 1:1;

[0065] Tetraacid dianhydride monomer is R 1 for

[0066] Diamine monomer is H 2 N-R 2 -NH 2 , R 2 for

[0067] The preparation method of described carbon hybrid polyimide ultra-short nanofiber comprises the steps:

[0068] (1) Electrospinning the solution of polyamic acid and hydroxyalkyl cellulose blend to form fiber nonwoven fabric;

[0069] (2) cut into strips;

[0070] (3) carbonization;

[0071] (4) cutting;

[0072] The prepa...

Embodiment 2

[0082] Embodiment 2 of the present invention provides a carbon hybrid polyimide ultra-short nanofiber, the raw material of which includes polyamic acid and hydroxyalkyl cellulose, and the weight ratio of polyamic acid and hydroxyalkyl cellulose is 9:1 ;

[0083] The hydroxyalkyl group in hydroxyalkylcellulose is hydroxymethyl;

[0084] The raw materials for the preparation of polyamic acid include tetraacid dianhydride monomers and diamine monomers, and the molar ratio of tetraacid dianhydride monomers to diamine monomers is 1:1;

[0085] Tetraacid dianhydride monomer is R 1 for

[0086] Diamine monomer is H 2 N-R 2 -NH 2 , R 2 for

[0087] The preparation method of described carbon hybrid polyimide ultra-short nanofiber comprises the steps:

[0088] (1) Electrospinning the solution of polyamic acid and hydroxyalkyl cellulose blend to form fiber nonwoven fabric;

[0089] (2) cut into strips;

[0090] (3) carbonization;

[0091] (4) cutting;

[0092] The prepa...

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Abstract

The invention relates to a carbon hybrid material, in particular to an electrospinning carbon hybrid polyimide ultra-short nanofiber and a preparation method thereof. The carbon hybrid polyimide ultra-short nanofiber comprises polyamide acid and hydroxyalkyl cellulose, wherein the weight ratio of the polyamide acid to the hydroxyalkyl cellulose is (1-9):1; the hydroxyalkyl group in the hydroxyalkyl cellulose is selected from one of or a combination of hydroxypropyl, hydroxyethyl and hydroxymethyl. The carbon hybrid polyimide ultra-short nanofiber is high in orientation degree, small in diameter and uniform in fiber length, and has good dispersity; in addition, the prepared short fiber is relatively high in conductivity and has potential application in the aspect of high-performance composite materials.

Description

technical field [0001] The invention relates to carbon hybrid materials, more specifically, the invention relates to an electrospun carbon hybrid polyimide ultra-short nanofiber and a preparation method thereof. Background technique [0002] Polyimide fiber is currently an organic fiber with a higher temperature. Compared with other high-performance fibers (such as aramid fibers and polyphenylene sulfide fibers), it has better heat resistance, aging resistance, oxidation resistance, UV resistance, and water absorption. Therefore, polyimide fibers are widely used in environmental protection, aerospace, special and high temperature insulation, civil textiles and other fields. In addition, carbon-doped polyimide materials are also widely used in various fields. [0003] At present, the conductive modification of polyimide mainly focuses on adding conductive fillers to raw materials, and obtaining polyimide conductive materials through polymerization, or using blending methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F8/18H01M4/36
CPCD01F8/16D01F8/18H01M4/364Y02E60/10
Inventor 侯豪情欧阳文程楚云王琦王煜明袁梦杰
Owner JIANGXI ADVANCED NANOFIBER S&T CO LTD