Research on Space Environment Adaptability of Polyimide Fiber with High-strength and High-modulus and Analysis of Its Application Prospects in Aerospace Field
1 Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China 2 China Academy of Space Technology, Beijing 100094, China 3 China Academy of Launch Vehicle Technology, Beijing 100076, China 4 Jiangsu Shino New Materials & Technology Co., Ltd., Changzhou 213149, Jiangsu, China
Abstract: Polyimide (PI) fiber with high-strength and high-modulus is a new type of high-performance organic fiber that has emerged in recent years.It has excellent mechanical properties, high and low temperature resistance, low dielectric, high insulation, high flame retardant, radiation resistance and other comprehensive properties, which makes it show broad application prospects in aerospace, aviation, safety protection, nuc-lear industry and other fields.Focusing on the application requirements of PI fiber with high-strength and high-modulus in the aerospace field, especially the application characteristics in the space environment, this work analyzes its performance in extreme temperature, alternating temperature, particle irradiation, high vacuum and long-term load environment.The adaptability of its space environment is preliminarily assessed in order to provide a design basis for related applications.The research results show that the PI fibers with high-strength and high-modulus exhibit excellent mechanical properties, high and low temperature resistance, particle irradiation resistance, and creep resistance.The tensile strength and tensile modulus can still reach 1.55 GPa and 27.74 GPa at 350 ℃, and the retention rate of tensile properties is higher than 98% after 1.0×108 rad (Si) dose particle irradiation.In addition, combined with the comprehensive performance of PI fibers, the application prospect of PI fibers in the aerospace field is prospected.
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2022, Vol. 36 
