Graphene/polyacrylonitrile composite fiber as well as spinning solution and preparation method thereof

A technology of polyacrylonitrile and spinning stock solution, which is applied in the direction of spinning solution preparation, conductive/antistatic filament manufacturing, single-component synthetic polymer rayon, etc., and can solve the problem of poor functionality of graphene/polyacrylonitrile fibers, Avoid problems such as winding around the rod and high spinning pressure, and achieve the effect of good spinnability and increased strength

Pending Publication Date: 2021-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, our research found that when producing graphene / polyacrylonitrile fibers by wet spinning of stock solution blending, the size of graphene directly affects the spinning performance of the stock solution. The size of graphene is larger than 1 micron, and the stock solution is difficult to extrude. The spinning pressure is high, and the phenomenon of hole blocking, broken filaments, and roll winding during spinning is serious. The size of graphene must be strictly controlled, but the size of graphene is too small, and the functionality of the obtained graphene / polyacrylonitrile fiber is poor, so it is necessary to A detailed study of the size of graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Add an aqueous sodium thiocyanate solution with a mass percentage concentration of about 39% to the polyacrylonitrile powder, mechanically stir for 0.5-1h to swell, then add an aqueous sodium thiocyanate solution with a mass percentage concentration of about 58% for high-shear dissolution treatment 1 -2h, obtain a polyacrylonitrile / sodium thiocyanate solution with a concentration of about 13% by mass of polyacrylonitrile, and a concentration of about 45%-46% by mass of sodium thiocyanate;

[0060] (2) Through high shear and ultrasonic treatment, nanographene and submicron graphene are compounded into a uniformly dispersed aqueous graphene dispersion in a mass ratio of 1:3, and then sodium thiocyanate is added to make the aqueous graphene The mass percent concentration of sodium thiocyanate in the dispersion is about 45%-46%;

[0061] (3) Add the polyacrylonitrile / sodium thiocyanate solution obtained in the appropriate step (1) to the graphene dispersion obtained in ...

Embodiment 2

[0064] (1) Add an appropriate amount of sodium thiocyanate aqueous solution with a mass percentage concentration of about 39% to the polyacrylonitrile powder, mechanically stir for 0.5-1h to swell, then add an aqueous sodium thiocyanate solution with a mass percentage concentration of about 58% for high-shear dissolution treatment 1-2h to obtain a polyacrylonitrile / sodium thiocyanate solution with a mass percent concentration of polyacrylonitrile of about 13%, and a sodium thiocyanate concentration of about 45%-46% by mass;

[0065] (2) Through high shear and ultrasonic treatment, nano graphene and submicron graphene are compounded into a uniformly dispersed aqueous graphene dispersion in a mass ratio of 1:4, and then sodium thiocyanate is added to make the aqueous graphene The mass percent concentration of sodium thiocyanate in the dispersion is about 45%-46%;

[0066] (3) Add the polyacrylonitrile / sodium thiocyanate solution obtained in the appropriate step (1) to the graphe...

Embodiment 3

[0069] (1) Add an appropriate amount of sodium thiocyanate aqueous solution with a mass percentage concentration of about 39% to the polyacrylonitrile powder, mechanically stir for 0.5-1h to swell, then add an aqueous sodium thiocyanate solution with a mass percentage concentration of about 58% for high-shear dissolution treatment After 1-2 hours, a polyacrylonitrile / sodium thiocyanate solution with a polyacrylonitrile concentration of about 13% is obtained, and the concentration of sodium thiocyanate is about 45%-46% by mass;

[0070] (2) Through high shear and ultrasonic treatment, nano graphene and submicron graphene are compounded into a uniformly dispersed aqueous graphene dispersion in a mass ratio of 1:9, and then sodium thiocyanate is added to make the aqueous graphene The mass percent concentration of sodium thiocyanate in the dispersion is about 45%-46%;

[0071] (3) Add the polyacrylonitrile / sodium thiocyanate solution obtained in the appropriate step (1) to the gra...

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Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a graphene/polyacrylonitrile composite fiber as well as a spinning solution and a preparation method thereof. The composite fiber is a copolymer of polyacrylonitrile, nano graphene and submicron graphene. The spinning solution for preparing the composite fiber is a solution in which the polyacrylonitrile is uniformly dissolved and the nano graphene and the submicron graphene are uniformly dispersed. The preparation method of the spinning solution comprises the following steps: uniformly mixing a part of solution in which the polyacrylonitrile is uniformly dissolved with a solution in which the nano graphene and the submicron graphene are uniformly dispersed to prepare a spinning precursor solution; and then uniformly mixing part or all of the spinning precursor solution with the rest of the solution in which the polyacrylonitrile is uniformly dissolved to prepare the spinning solution. The graphene/polyacrylonitrile composite fiber with antistatic, high-strength and antibacterial functions can be obtained by using the spinning solution for preparing the graphene/polyacrylonitrile composite fiber.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a graphene / polyacrylonitrile composite fiber, its spinning stock solution and a preparation method. Background technique [0002] Graphene is a nano-material with high conductivity discovered in recent years. As a filler, it can significantly improve the conductivity and strength of polymers. However, our research found that when producing graphene / polyacrylonitrile fibers by wet spinning of stock solution blending, the size of graphene directly affects the spinning performance of the stock solution. The size of graphene is larger than 1 micron, and the stock solution is difficult to extrude. The spinning pressure is high, and the phenomenon of hole blocking, broken filaments, and roll winding during spinning is serious. The size of graphene must be strictly controlled, but the size of graphene is too small, and the functionality of the obtained graphene / polyac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/54D01F1/09D01F1/10D01D1/02
Inventor 伍三华韩风辛美音李静顾丹凤宋铮姚坚薛丽毕建东
Owner CHINA PETROLEUM & CHEM CORP
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