A carbon fiber for a polysulfone resin-based composite material and a preparation method thereof

Abstract

The invention discloses a carbon fiber for a polysulfone resin-based composite material and a preparation method of the carbon fiber. The preparation process of the carbon fiber for the polysulfone resin-based composite material sequentially comprises the production processes of polymerization, spinning, pre-oxidation, low-temperature carbonization, high-temperature carbonization, surface treatment, water washing, drying before sizing, sizing, drying after sizing, and winding, wherein a polysulfone resin-based suspension sizing agent is adopted during sizing; the polysulfone resin-based suspension sizing agent is prepared from polysulfone resin powder, sodium polyacrylate, polyvinyl alcohol and deionized water; the total mass of the solid components is 100%, the polysulfone resin powder accounts for 65-75wt%, the sodium polyacrylate accounts for 10-15wt%, and the polyvinyl alcohol accounts for 15-20wt%. The prepared carbon fiber is suitable for preparing a polysulfone resin-based composite material, and the prepared composite material is high in heat resistance and excellent in interface mechanical property.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber preparation, in particular to a carbon fiber for polysulfone resin-based composite materials and a preparation method thereof. Background technique [0002] Composite materials are an important development direction in the field of materials in recent years. Resin-based composite materials prepared with carbon fiber as a reinforcing phase and high-performance thermosetting or thermoplastic resin as a matrix have broad application prospects in aerospace, automotive, wind power and many other fields. At present, most commonly used matrix resins are thermosetting resins, which have disadvantages such as poor toughness, high water absorption, and poor stability under hot and humid conditions. Therefore, high-performance thermoplastic resins have attracted more and more attention. Among them, polysulfone resin has excellent mechanical properties, high temperature resistance, good dimensional stabi...

AI Technical Summary

Problems solved by technology

In the sizing process, the present invention introduces a new type of suspension-like carbon fiber sizing agent prepared by a physical stirring and mixing method with polysulfone resin powder as the main body, sodium polyacrylate as the main dispersant, polyvinyl alcohol as a stabilizing aid, and a physical mixing method to solve the problem. Solved the problems of poor impregnation of polysulfone matrix resin and aging and hardening of fibers

In the sizing process, the infrared radiation heating process before sizing is introduced, and the horizontal hot air drying oven drying process is introduced in the drying process after sizing, which solves the problem of uniformity of polysulfone resin suspension sizing agent spreading on the carbon fiber surface and fiber drying, etc. question

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