Method for preparing electrothermal heating sheet by using carbon fiber braided fabric leftover material

Abstract

The invention provides a method for preparing an electric heating piece by using carbon fiber braided fabric leftover materials. The method comprises the following steps: cutting the unordered carbon fiber braided fabric leftover materials into short carbon fibers; respectively cleaning with acetone and deionized water, and drying; preparing corresponding dispersion liquid; mixing the chopped carbon fibers into the dispersion liquid and fully dispersing; filtering by adopting a double-layer metal filter screen, and drying after filtering to obtain a chopped carbon fiber felt; and cutting the chopped carbon fiber felt, adhering electrodes to two ends of the chopped carbon fiber felt, and covering the front surface and the back surface of the chopped carbon fiber felt with TPU sheets to form a heating sheet product with electric heating performance and electromagnetic shielding performance. Carbon fiber braided fabric leftover materials and leftover materials generated by cutting in the preparation process are directly discarded as wastes, so that the materials are greatly wasted, and the leftover materials become a killer of environmental pollution. According to the method, the carbon fiber braided fabric leftover materials are fully utilized, the manufacturing cost is low, and the prepared product has the electric heating performance and the electromagnetic shielding performance and is excellent in performance.

Description

technical field [0001] The invention relates to the reuse of leftovers of carbon fiber braids, in particular to a method for preparing electric heating sheets by using leftovers of carbon fiber braids. Background technique [0002] Traditional electrothermal materials generally have the problem of large energy consumption, and there are great limitations in the use process. Therefore, finding high-efficiency and energy-saving electrothermal materials has become a research hotspot in the field of materials. Due to its low resistivity and high thermal conductivity, carbon fiber has broad prospects in the application field of composite electric heating devices. [0003] Carbon fiber has high specific strength and specific modulus, low density, no creep, small thermal expansion coefficient, good electrical conductivity, excellent electromagnetic shielding performance, corrosion resistance, harmless to humans and animals, etc., and is widely used in composite materials reinforce...

AI Technical Summary

Problems solved by technology

Electromagnetic interference (EMI, Electromagnetic interference) generated by different electronic devices during operation will adversely affect the performance of electronic systems, and prolonged exposure to electromagnetic radiation will also cause harm to human health

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