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Method for treating carbon fiber precursor fiber and special oil agent thereof

A precursor fiber, carbon fiber technology, applied in fiber processing, textiles and papermaking, etc., can solve problems such as unsatisfactory and difficult to obtain high-quality carbon fiber

Active Publication Date: 2013-08-07
WEIHAI TUOZHAN FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the oil can not meet the requirements of polyacrylonitrile preoxidation conditions and it is difficult to obtain high-quality carbon fiber

Method used

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  • Method for treating carbon fiber precursor fiber and special oil agent thereof
  • Method for treating carbon fiber precursor fiber and special oil agent thereof
  • Method for treating carbon fiber precursor fiber and special oil agent thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1, the preparation of oil agent, the processing of polyacrylonitrile fiber and the preparation of polyacrylonitrile carbon fiber

[0040] (1), the preparation of methyl polysilsesquioxane

[0041] After fully mixing 1 part of methyltrimethoxysilane monomer with 15 parts of water, add 0.1 part of 1mol / L phosphoric acid as a catalyst, and stir at room temperature for 24 hours to fully hydrolyze and condense the silane monomer to generate The methylsilane prepolymer precipitated due to insolubility in water. Then directly wash the aqueous solution to neutrality, and freeze-dry to obtain the methyl polysilsesquioxane body material, and its structural formula is shown in formula (II) (all the above parts are parts by mass).

[0042] (2), preparation of oil agent

[0043] The formula is: methyl polysilsesquioxane (structural formula is shown in formula (II), wherein, R' is CH 3 - or H-, the degree of polymerization is 10) 4g, 94g ethanol and 2g glycerol.

[004...

Embodiment 2

[0049] Embodiment 2, the preparation of oil agent, the processing of polyacrylonitrile fiber and the preparation of polyacrylonitrile carbon fiber

[0050] (1), preparation of phenyl polysilsesquioxane

[0051] After fully mixing 1 part of phenyltrimethoxysilane monomer with 12 parts of water, add 0.15 parts of 1mol / L phosphoric acid as a catalyst, and stir at room temperature for 24 hours to fully hydrolyze and condense the silane monomer to generate The phenylsilane prepolymer precipitated due to insolubility in water. Then directly wash the aqueous solution until neutral, and freeze-dry to obtain the phenyl polysilsesquioxane body material, the structural formula of which is shown in formula (III) (the above parts are parts by mass).

[0052] (2), preparation of oil agent

[0053] The formula is: phenyl polysilsesquioxane (structural formula is shown in formula (III), wherein, R' is CH 3 - or H-, the degree of polymerization is 12) 5g, octyloxyethylene phosphate octylphe...

Embodiment 3

[0059] Embodiment 3, the preparation of oil agent, the processing of polyacrylonitrile fiber and the preparation of polyacrylonitrile carbon fiber

[0060] (1), preparation of vinyl polysilsesquioxane

[0061] After fully mixing 1 part of vinyltrimethoxysilane monomer with 10 parts of water, add 0.2 part of 1mon / L phosphoric acid as a catalyst, and stir at room temperature for 24 hours to fully hydrolyze and condense the silane monomer to produce Vinylsilane prepolymer precipitated due to insolubility in water. Then directly wash it with water until neutral, and obtain the vinyl polysilsesquioxane body material after freeze-drying, and its structural formula is shown in formula (IV) (the above parts are parts by mass).

[0062] (2), preparation of oil agent

[0063] The formula is: vinyl polysilsesquioxane (structural formula is shown in formula (IV), wherein, R' is CH 3 - or H-, the degree of polymerization is 8) 10g, 2g of decyloxyethylene dodecylphenyl phosphate, 5g of h...

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Abstract

The invention discloses a method for treating carbon fiber precursor fibers and a special oil agent thereof. The oil agent comprises polysiloxane and a solvent; in formula (I), R is selected from C1-C18 alkyl or C6-C18 aryl; x, y and z are 0-1, and x+y+z equals 1; the polymerization degree is 4-20; the solvent is at least one of C1-C18 alkane, C1-C10 halogenated hydrocarbon, C6-C10 aromatic hydrocarbon, C1-C18 fatty alcohol and C6-C10 aromatic alcohol; R' is CH3- or -H; the mass percent of the polysiloxane in the oil agent is 1%-25%. The method for treating carbon fiber precursor fibers provided by the invention comprises soaking of the carbon fiber precursor fibers by the oil agent; after soaking and drying, the treated carbon fiber precursor fibers are obtained. The carbon fiber precursor fibers treated by the oil agent are superior to carbon fibers in the prior art with respect to appearance and mechanical properties.

Description

technical field [0001] The invention relates to a method for processing carbon fiber precursor fibers and a special oil agent thereof, in particular to a method for processing acrylonitrile fibers and a special oil agent thereof. Background technique [0002] The conventional preparation method of carbon fiber is to pre-oxidize the polyacrylonitrile fiber (PAN fiber) in an oxidizing atmosphere, and then carbonize it in an inert atmosphere. The pre-oxidation process of PAN fibers in an oxidizing atmosphere is quite complicated. Oxidation, dehydrogenation, and cyclization are all exothermic reactions. If the heat released by these reactions cannot be discharged in time, heat storage and overheating will increase the local temperature and intensify reaction, resulting in fiber breakage and embrittlement, thus the inability to obtain high-quality fibers limits its application. In order to overcome this shortcoming, researchers have proposed several solutions: one is to use orga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/643D06M13/292D06M13/148D01F9/22D06M101/28
Inventor 李书乡徐坚余晓兰张小莉赵宁
Owner WEIHAI TUOZHAN FIBER