Oil agent for carbon fiber precursor

Abstract

The invention discloses an oil agent for a carbon fiber precursor. The oil agent comprises dimethyl silicone oil, amino silicon oil, polyether silicone oil and aliphatic polyoxyethylene ether, the oilagent is dispersed in water to form waterborne emulsion, the dimethyl silicone oil accounts for 60-80% of the weight of a non-volatility component of the oil agent, the amino silicon oil accounts for1-10% of the weight of the non-volatility component of the oil agent, the polyether silicone oil accounts for 1-10% of the weight of the non-volatility component of the oil agent, and the aliphatic polyoxyethylene ether accounts for 15-35% of the weight of the non-volatility component of the oil agent. According to the oil agent, absolute amount of dimethyl silicone oil and a small quantity of amino silicon oil and polyether silicone oil serve as main components of the oil agent, the aliphatic polyoxyethylene ether serves as an emulsifying agent, stable oil agent emulsion with small average particle size can be prepared, affinity and uniform film-forming property of the oil agent and the precursor can be achieved, the problem of roll sticking of modified silicon oil in the use process issolved, running stability is improved, on-site labor intensity is reduced, and high-quality and high-grade PAN (polyacrylonitrile) precursors and carbon fiber products are acquired.

Description

technical field [0001] The invention relates to an oil agent, in particular to an oil agent for carbon fiber precursors, and belongs to the technical field of textile oil agents. Background technique [0002] Carbon fiber is an important reinforcement material. Industrially, the production method of carbon fiber is to pre-oxidize the polyacrylonitrile (PAN) fiber bundle as the precursor fiber in an oxidative atmosphere between 200 and 400 ° C to obtain pre-oxidized fibers, and then at least 1000 ° C Carbonization is carried out in an inert atmosphere such as nitrogen at a high temperature to obtain carbon fibers. [0003] In the pre-oxidation process, since the process temperature exceeds the softening point of the PAN precursor, the PAN monofilament will soften and even melt under the action of heat, and adjacent monofilaments will stick to each other, resulting in multiple monofilament fibers Merge together, resulting in the so-called adhesion and silk phenomenon. The a...

AI Technical Summary

Problems solved by technology

[0008] Introducing non-silicon substances into the oil agent, reducing the content of amino silicone oil, etc., can only alleviate this phenomenon to a certain extent, and cannot completely solve the problem of sticking rolls

Strengthening the intensity of on-site inspections will significantly increase the workload of on-site personnel, and for equipment such as wire splitters, if semi-cured oil blocks adhere to them, it will be difficult to deal with them during fiber operation, and it is easy to forcibly deal with them. Cause damage to fiber bundles and even production and safety accidents

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