A kind of preparation method of polyacrylonitrile graphene fiber

A graphene fiber, polyacrylonitrile technology, applied in spinning solution preparation, fiber chemical characteristics, rayon manufacturing and other directions, can solve problems such as insufficient fiber performance, and achieve the effect of improving performance and reducing costs

Active Publication Date: 2022-04-22
JILIN ACRYLIC FIBERS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The Chinese patent application number 201110450967.6 discloses a method for preparing graphene-modified polyacrylonitrile-based carbon fibers, but it is found through tests that the fibers prepared by the method provided by this patent still have insufficient performance

Method used

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  • A kind of preparation method of polyacrylonitrile graphene fiber

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) With a concentration of 90.5wt% acrylonitrile and a concentration of 5.75wt% vinyl acetate as monomers, the monomer concentration is 15wt%, and at a temperature of 50°C and a pH of 2.5, carry out aqueous phase suspension polymerization , to obtain polyacrylonitrile powder; after mixing polyacrylonitrile powder with dimethylacetamide, first heating up and then cooling down to obtain polyacrylonitrile solution;

[0042] (2) Grinding the graphene to a particle size of less than 10 μm and mixing it with dimethylacetamide and polyacrylonitrile solution to obtain a graphene mother liquor, wherein the concentration of graphene is 6wt%;

[0043] (3) Graphene mother liquor is mixed with polyacrylonitrile solution, and the ratio of graphene mother liquor and polyacrylonitrile solution is 2:100, obtains spinning solution;

[0044] (4) The spinning solution is spun by a two-step wet spinning process, wherein the coagulation bath is dimethylacetamide, the concentration of the co...

Embodiment 2

[0046] (1) With a concentration of 90.5wt% acrylonitrile and a concentration of 5.75wt% vinyl acetate as monomers, the monomer concentration is 15wt%, and at a temperature of 50°C and a pH of 2.5, carry out aqueous phase suspension polymerization , to obtain polyacrylonitrile powder; after mixing polyacrylonitrile powder with dimethylacetamide, first heating up and then cooling down to obtain polyacrylonitrile solution;

[0047] (2) Grinding the graphene to a particle size of less than 10 μm and mixing it with dimethylacetamide and polyacrylonitrile solution to obtain a graphene mother liquor, wherein the concentration of graphene is 6wt%;

[0048] (3) Graphene mother liquor is mixed with polyacrylonitrile solution, and the ratio of graphene mother liquor and polyacrylonitrile solution is 10:100, obtains spinning solution;

[0049] (4) The spinning solution is spun by a two-step wet spinning process, wherein the coagulation bath is dimethylacetamide, the concentration of the c...

Embodiment 3

[0051] (1) With a concentration of 90.5wt% acrylonitrile and a concentration of 5.75wt% vinyl acetate as monomers, the monomer concentration is 15wt%, and at a temperature of 50°C and a pH of 2.5, carry out aqueous phase suspension polymerization , to obtain polyacrylonitrile powder; after mixing polyacrylonitrile powder with dimethylacetamide, first heating up and then cooling down to obtain polyacrylonitrile solution;

[0052] (2) Grinding graphene to a particle size of less than 10 μm and mixing with dimethylacetamide and polyacrylonitrile solution to obtain a graphene mother liquor, wherein the concentration of graphene is 20wt%;

[0053] (3) Graphene mother liquor is mixed with polyacrylonitrile solution, and the ratio of graphene mother liquor and polyacrylonitrile solution is 20:100, obtains spinning solution;

[0054] (4) The spinning solution is spun by a two-step wet spinning process, wherein the coagulation bath is dimethylacetamide, the concentration of the coagula...

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Abstract

The present invention relates to a kind of preparation method of polyacrylonitrile graphene fiber, comprising the preparation of polyacrylonitrile solution, the preparation of graphene mother liquor, the preparation of spinning solution, spinning, in the preparation process of graphene mother liquor, graphene, Dimethylacetamide is mixed with polyacrylonitrile solution to obtain graphene mother liquor. The present invention also relates to a polyacrylonitrile graphene fiber prepared by the above-mentioned preparation method. In the present invention, by mixing graphene, dimethylacetamide and polyacrylonitrile solution, a graphene mother liquor with uniform distribution and a shelf life of more than 6 months can be prepared without adding a dispersant, thereby reducing the cost and reducing the cost due to addition. The dispersant has an impact on safety and environmental protection, production technology and fiber quality. At the same time, the above-mentioned graphene mother liquor and polyacrylonitrile solution are mixed more uniformly, thereby improving the performance of the obtained polyacrylonitrile graphene fiber.

Description

technical field [0001] The invention relates to a preparation method of polyacrylonitrile graphene fiber. Background technique [0002] With the continuous development of social economy, the global demand for new fibers with special functions is increasing, especially fibers with high strength and high conductivity are gradually being explored for applications in reinforcing materials, functional clothing, electromagnetic fields, military and other fields. Modified fiber materials have become one of the hot spots in the field of composite materials research. 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 pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/54D01F1/09D01F1/10D01D1/02
CPCD01F6/54D01F1/09D01F1/103D01D1/02
Inventor 刘建军孙小君杜万洪李凯张丹杨永生孙宏斌韩嵩王立王伟王卫国宫思博李亮王鑫龙施二铁马雪松柳长青张喜斌姜志杰于晓建韩冰
Owner JILIN ACRYLIC FIBERS CO LTD
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