Method for producing carbonized fiber

Abstract

The invention discloses a method for producing a carbonized fiber. The method mainly comprises the following steps: performing high-temperature carbonization on a carbon fiber precursor fiber beam soas to obtain a carbonized fiber, further performing plasma treatment on the carbonized fiber so as to obtain a relatively roughened plasma modified structure on the surface of the carbonized fiber, and finally covering the surface of the carbonized fiber with a resin oil agent, thereby obtaining the carbonized fiber with the resin oil agent on the surface. Particularly, through a plasma surface treatment step, the surface of the carbonized surface is roughened; in addition, functional groups on the surface are enriched, high-quality interface combination of the carbonized fiber and the resin oil agent is achieved, furthermore the carbonized fiber which is relatively stable and reliable in structure is achieved, the cost of carbonized fiber equipment is effectively reduced, and the operation time can be effectively shortened.

Description

technical field [0001] The present invention is related to carbonized fiber manufacturing technology, and aims to provide a carbonized fiber manufacturing method that can greatly improve the sizing quality of carbonized fibers and effectively reduce the cost and working hours of carbonized fiber production equipment. Background technique [0002] Carbonized fiber can be divided into carbon fiber or graphite fiber according to the carbon content in the fiber. Due to its excellent mechanical and electrical properties, it can be widely used in various purposes; most of the carbonized fibers seen in the market are polyacrylonitrile fibers. It is obtained by calcining (high-temperature carbonization) a carbon fiber precursor fiber bundle formed by bundling precursor fibers of carbon fiber. [0003] There are many types of precursor fibers available for carbonized fibers, such as rayon, polyvinyl alcohol, vinylidene chloride, polyacrylonitrile (PAN), pitch, etc.; the current mains...

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Problems solved by technology

[0007] However, when the surface treatment of carbonized fibers is carried out by heat treatment, the conventional technology for processing carbonized fibers is to treat carbonized fibers at 500°C to 800°C for 1 to 10 minutes in the air, which not only takes a lot of time, but also usually one-time treatment Larger quantities make it relatively difficult to control the processing quality; as for the surface treatment of carbonized fibers by electrolysis, at least one drying procedure must be performed after the electrolysis procedure to coat the fiber surface with oil, which not only costs It takes a lot of time and procedures and usually affects the processing quality due to changes in the electrolyte, and even deposits impurities on the fiber surface

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