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Sizing agent for silicon carbide or silicon nitride fibers and preparing method and application of sizing agent

A technology of silicon nitride fiber and silicon carbide fiber, which is applied in fiber processing, textile and papermaking, etc., can solve the problems of easy fluffing and broken ends, and achieve the effect of improving strength, stable performance, simple process and equipment.

Inactive Publication Date: 2019-06-07
福建立亚新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to develop a sizing agent that can solve the problems of fluffing, broken ends, defects or dust adsorption that occur in the production process of the existing above-mentioned various fibers, improve fiber continuity, improve its Softness and Weave

Method used

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  • Sizing agent for silicon carbide or silicon nitride fibers and preparing method and application of sizing agent
  • Sizing agent for silicon carbide or silicon nitride fibers and preparing method and application of sizing agent
  • Sizing agent for silicon carbide or silicon nitride fibers and preparing method and application of sizing agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A sizing agent for silicon carbide or silicon nitride fiber provided by the invention consists of 0.2 parts by weight of polyvinyl alcohol, 0.1 part of modified silicone oil, 0.5 part of alkylphenol polyoxyethylene ether, 0.1 part of benzoic acid, deionized 100 parts of water.

[0026] The polyvinyl alcohol is PVA17-88, that is, polyvinyl alcohol with a surface polymerization degree of 1700 and an alcoholysis degree of 88%. Effective substance for sizing agent.

[0027] The modified silicone oil is polyether amino block modified silicone oil. Polyether amino block modified silicone oil is the fourth generation (latest generation) softener, which is more hydrophilic than other conventional modified silicone oils, and endows fibers or fabrics with certain antistatic properties, reducing the absorption of water molecules and dust by fibers. At the same time, emulsifiers can be reduced or eliminated. Typical molecular structure of polyether amino block modified silicone ...

Embodiment 2

[0039] A sizing agent for silicon carbide or silicon nitride fibers provided by the invention consists of 0.8 parts by weight of polyvinyl alcohol, 1.5 parts of modified silicone oil, 3.5 parts of alkylphenol polyoxyethylene ether, 0.25 parts of benzoic acid, deionized 100 parts of water.

[0040] The polyvinyl alcohol is PVA17-88, that is, polyvinyl alcohol with a surface polymerization degree of 1700 and an alcoholysis degree of 88%. Effective substance for sizing agent.

[0041] The modified silicone oil is polyether amino block modified silicone oil. Polyether amino block modified silicone oil is the fourth generation (latest generation) softener, which is more hydrophilic than other conventional modified silicone oils, and endows fibers or fabrics with certain antistatic properties, reducing the absorption of water molecules and dust by fibers. At the same time, emulsifiers can be reduced or eliminated. Typical molecular structure of polyether amino block modified sili...

Embodiment 3

[0053] A sizing agent for silicon carbide or silicon nitride fibers provided by the invention consists of 0.3 parts by weight of polyvinyl alcohol, 0.2 parts of modified silicone oil, 1.0 parts of alkylphenol polyoxyethylene ether, 0.13 parts of benzoic acid, deionized 100 parts of water.

[0054] The polyvinyl alcohol is PVA17-88, that is, polyvinyl alcohol with a surface polymerization degree of 1700 and an alcoholysis degree of 88%. Effective substance for sizing agent.

[0055] The modified silicone oil is polyether amino block modified silicone oil. Polyether amino block modified silicone oil is the fourth generation (latest generation) softener, which is more hydrophilic than other conventional modified silicone oils, and endows fibers or fabrics with certain antistatic properties, reducing the absorption of water molecules and dust by fibers. At the same time, emulsifiers can be reduced or eliminated. Typical molecular structure of polyether amino block modified sili...

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Abstract

The invention discloses a sizing agent for silicon carbide or silicon nitride fibers. The sizing agent is prepared from, by weight, 0.2-0.8 part of polyvinyl alcohol, 0.1-1.5 parts of modified silicone oil, 0.5-3.5 parts of alkylphenol ethoxylates, 0.1-0.25 part of benzoic acid and 100 parts of deionzied water. The sizing agent for the silicon carbide or silicon nitride fibers is applied to ceramic fibers converted by a polycarbosilane precursor such as second-generation and third-generation continuous silicon carbide fibers, wave-transmitting-type continuous silicon carbide fibers and broadband wave-absorbing continuous silicon carbide fibers, and bonding and bundling of loose cellosilk can be enhanced. Softness of the fibers is facilitated, the friction force of fiber bundles is reduced,and thus the fiber bundles are easier to weave; coverage and repair of defective holes in the surfaces of the fibers are facilitated, and the intensity of the fibers is improved; improvement of the static resistance of the surfaces of the fibers is facilitated, and adsorption of water molecules and dust particles in the atmosphere is reduced.

Description

technical field [0001] The invention relates to a sizing agent for silicon carbide or silicon nitride fiber and its preparation method and application, in particular to a silicon carbide or silicon nitride transformed with polycarbosilane (hereinafter referred to as PCS) as a precursor A sizing agent for fibers and its preparation method and application, such as continuous silicon carbide fiber, continuous silicon nitride fiber, etc. Background technique [0002] The PCS precursor method produces continuous ceramic fibers, such as the second-generation and third-generation silicon carbide fibers, wave-transmitting silicon nitride fibers, broadband wave-absorbing silicon carbide fibers (hereinafter referred to as "various fibers"), etc., which have high strength. High modulus, high temperature resistance and oxidation resistance, low creep, low density, anti-ablation, anti-radiation and other characteristics are the key components of long-life hot end structures and high-perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/333D06M15/647D06M15/53D06M13/188
Inventor 黄祥贤郑桦庄佳慧谢显斌杨灿权吴怡鑫叶进发晏凌云杜晨
Owner 福建立亚新材有限公司
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