Carbon fiber precursor pre-oxidation device and using method thereof

Abstract

The invention discloses a carbon fiber precursor pre-oxidation device and a using method thereof. The carbon fiber precursor pre-oxidation device comprises a first shaft arranged on a carbon fiber precursor, a support fixed by an external machine frame is connected to the arc-shaped contour of the first shaft in a penetrating mode, a motor is fixedly connected to the side face of the support, the right end of an output shaft on the motor is fixedly connected with the left end of the first shaft, a rectangular limiting rod is fixedly connected to the side face of the support, a first frame is slidably connected to the rectangular limiting rod in a limiting mode, a worm gear is rotatably connected to the inner wall of the first frame through a fixed shaft, and a first rotating arm is fixedly connected to the circle center of the front side of the worm gear. Through cooperative use of the structures, the problems that in the actual use process, skin-core structure and micropore defects are caused due to the fact that oxygen is slowly diffused into fibers in the pre-oxidation process of the fibers, and accumulation of reaction heat in the center area of the fibers further has important influences on the final structural performance of the carbon fibers are solved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber material preparation, in particular to a carbon fiber precursor pre-oxidation device and a method for using the same. Background technique [0002] There are many kinds of precursors for preparing carbon fibers, among which polyacrylonitrile (PAN)-based carbon fibers account for more than 90% of the total output of carbon fibers. Pre-oxidation is an important link in the production of PAN-based carbon fibers, which not only controls the output of carbon fibers, but also has an important impact on the performance and carbon yield of carbon fibers. The pre-oxidation time is as long as 80-100min, accounting for about 90% of the whole process of carbon fiber production. Although the research on pre-oxidation of precursor began in the 1950s, it is still the key to restrict the performance and output of carbon fiber. Improving pre-oxidation quality and shortening pre-oxidation time are two techni...

AI Technical Summary

Problems solved by technology

The consequence of this heating method is that the pre-oxidation reaction occurs first on the surface of the original silk, forming a denser and rigid surface structure, which not only prevents the diffusion of oxygen to the center of the original silk, but also affects the radial shrinkage of the fiber, resulting in skin Core structure and core defect formation

These defects will be inherited to the carbon fiber with the subsequent process steps, affecting the final carbon fiber performance

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