A kind of continuous polycarbosilane fiber spinning oil and its preparation and use method

Abstract

The invention provides continuous polycarbosilane fiber spinning oil, and a preparation method and a use method thereof. The spinning oil is prepared from 2 to 9 percent of an ingredient A, 3 to 8 percent of an ingredient B, 1 to 6 percent of an ingredient C and the balance water, wherein the ingredient A is a mixed solution prepared from silicon oil and water according to a mass ratio of 1:(3 to 10); the ingredient B is a water solution of a smooth film forming agent; the ingredient C is a surfactant. The preparation method comprises the following steps that the three ingredients are mixed; operations of heating, stirring, cooling and ultrasonic treatment are performed; a finished product is obtained. The use method comprises the following steps that a spraying mode is used; the spinning oil is sprayed onto the surface of continuous polycarbosilane nascent fiber at the oiling rate being 0.1 to 5.0 percent. The spinning oil has the advantages that the stability is higher; in the continuous polycarbosilane fiber spinning, the effects of anti-static electricity, holding and bundling, fiber bonding prevention, broken end rate reduction and the like are achieved; in non-melting spinning, fiber melting and merging is not discovered; the smooth yarn withdrawal can be realized. The preparation method and the use method provided by the invention have the advantages that the process is simple, and the cost is low.

Description

technical field [0001] The invention relates to an auxiliary agent used in the melt spinning process of fiber filaments and its preparation and use method, in particular to a continuous polycarbosilane fiber spinning oil and its preparation and use method. Background technique [0002] Continuous silicon carbide fiber has thin diameter, high strength, high modulus, can be woven, high temperature chemical stability and oxidation resistance, and the modified SiC fiber also has the ability to absorb or transmit radar waves. It is one of the preferred high-performance reinforcing fibers for advanced lightweight high-temperature resistant ceramic matrix composites, metal matrix composites and radar absorbing structural materials, and has broad application prospects in high-tech fields such as aerospace, aviation, and nuclear industries. [0003] Continuous polycarbosilane fibers are the precursors for making continuous silicon carbide fibers. After the precursor polycarbosilane ...

AI Technical Summary

Problems solved by technology

This creates a contradiction: In order to eliminate static electricity and bundle the fibers so as not to cause hair breakage, the surface of the fibers can be coated with oil to make the fibers tightly entangled, but at the same time, in order to prevent the fibers from melting uniformly and not producing Silk, and the fibers need not be too tightly cohesive

Because of this contradiction, there is no spinning finish that can fully meet all these requirements.

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