Silane modified silicon carbide fiber and preparation method thereof

A technology of silicon carbide fiber and silane modification, applied in the field of materials, can solve the problems of low stability of composite materials, and achieve the effects of good mechanical stability, promotion of epoxy crosslinking, good strength and toughness

Inactive Publication Date: 2019-07-26
宁波众兴新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the stability of composite materials prepared from silicon carbide fib

Method used

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preparation example Construction

[0023] A preparation method of silane modified silicon carbide fiber, comprising the following steps:

[0024] (1) Take the silane coupling agent kh550, add it to 13 times the weight of absolute ethanol, raise the temperature to 50°C, add silicon carbide fiber, keep stirring for 1 hour, distill off the ethanol to obtain the aminosilane modified polymer ;

[0025] (2) Mix 2,2-dimethylolpropionic acid and ethyl orthosilicate, add to deionized water 36 times the weight of the mixture, stir and react for 3 hours to obtain a sol solution;

[0026] (3) Take the above-mentioned aminosilane-modified polymer, add it to the sol solution, raise the temperature to 70°C, heat and stir for 1 hour, filter with suction, wash the filter cake with water, send it to a sintering furnace, and dry it at 170°C After 3 hours, cool to normal temperature to obtain fiber sol;

[0027] (4) Mix polyamide wax micropowder and barium stearate, add to toluene which is 6 times the weight of the mixture, and ...

Embodiment 2

[0032] A silane-modified silicon carbide fiber, comprising the following raw materials in parts by weight:

[0033] Silicon carbide fiber 140, silane coupling agent kh550 3, 2,2-dimethylolpropionic acid 4, orthosilicate 40, polyamide wax micropowder 5, glycidol 2, barium stearate 3, formazan Methyl acrylate 20, catalyst 0.1, polytetrafluoroethylene 8, triethylamine 1.

[0034] The catalyst is lithium methylate.

[0035] A preparation method of silane modified silicon carbide fiber, comprising the following steps:

[0036] (1) Take the silane coupling agent kh550, add it to 20 times the weight of absolute ethanol, raise the temperature to 55°C, add silicon carbide fiber, keep stirring for 2 hours, distill off the ethanol to obtain the aminosilane modified polymer ;

[0037] (2) Mix 2,2-dimethylolpropionic acid and ethyl orthosilicate, add to deionized water 40 times the weight of the mixture, stir and react for 5 hours to obtain a sol solution;

[0038] (3) Take the above-m...

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Abstract

The invention discloses silane modified silicon carbide fiber which comprises, by weight, 120-140 parts of silicon carbide fiber, 1-3 parts of silane coupling agent kh550, 2-4 parts of 2, 2-dimethylolpropionic acid, 30-40 parts of ethyl orthosilicate, 3-5 parts of polyamide wax micropowder, 1-2 parts of glycidol, 2-3 parts of barium stearate, 16-20 parts of methyl methacrylate, 0.07-0.1 part of catalyst, 5-8 parts of polytef and 0.8-1 part of triethylamine. A finished product composite material obtained by the silane modified silicon carbide fiber has high strength and toughness, high mechanical stability and excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a silane-modified silicon carbide fiber and a preparation method thereof. Background technique [0002] Silicon carbide fiber is an inorganic fiber with β-silicon carbide structure made from organosilicon compound by spinning, carbonization or vapor deposition. It belongs to ceramic fiber. The strength and oxidation resistance are better than carbon fiber, the strength reaches 1960-4410MPa, the strength retention rate is above 80% at the highest service temperature, the modulus is 176.4-294GPa, and the chemical stability is also good. [0003] Silicon carbide fibers are mainly used as high temperature resistant materials and reinforcing materials. High temperature resistant materials include heat shielding materials, high temperature resistant conveyor belts, filter cloths for filtering high temperature gases or molten metals, etc. When used as a reinforcing material, it is ...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08L27/18C08L77/00C08K9/06C08K7/10C08K5/09C04B41/00
CPCC04B41/009C08L33/12C08L2205/03C04B35/565C08L27/18C08L77/00C08K9/06C08K7/10C08K5/09
Inventor 田仕昂
Owner 宁波众兴新材料科技有限公司
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