摘要
聚酰亚胺(PI)材料因其优异的性能被广泛应用于低地球轨道(LEO)航天器,但易受到原子氧(AO)侵蚀。为解决这一问题,通过在PI中加入5 wt%的Ti_(3)C_(2)T_(x),应用连续离心喷涂技术制备了Ti_(3)C_(2)T_(x)/PI复合薄膜。在模拟的LEO环境下,对薄膜进行AO辐照实验。结果表明,Ti_(3)C_(2)T_(x)/PI复合薄膜在保持PI原有力学性能的同时,抗AO性能显著提升,其AO剥蚀率仅为PI薄膜的6.6%。实验和分子动力学模拟均证实,Ti_(3)C_(2)T_(x)与AO反应生成钛氧化物钝化层,有效保护材料免受进一步AO侵蚀。所制备的Ti_(3)C_(2)T_(x)/PI复合薄膜有望成为新型高性能抗AO侵蚀材料。
Polyimide(PI)is widely used in low Earth orbit(LEO)spacecraft,but is vulnerable to atomic oxygen(AO)erosion.To address this issue,PI was blended with 5 wt%of Ti_(3)C_(2)T_(x) nanoparticles,and Ti_(3)C_(2)T_(x)/PI composite films were prepared using continuous centrifugal spraying technology.The AO erosion resistance of the films was evaluated under a simulated LEO environment.The results showed that the composite films maintained the original mechanical properties of PI films,while exhibiting significantly improved AO resistance,with an AO erosion yield of only 6.6%that of the PI films.These findings,confirmed by both experimental and molecular dynamics simulation,revealed that Ti_(3)C_(2)T_(x) reacts with AO to form a titanium oxide passivation layer,effectively protecting the material from further AO attack.The results demonstrate the potential of Ti_(3)C_(2)T_(x)/PI composite films as novel high-performance anti-AO erosion materials for LEO spacecraft applications.
作者
柳健
黄传进
魏强
赵丽滨
胡宁
LIU Jian;HUANG Chuanjin;WEI Qiang;ZHAO Libin;HU Ning(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300401,China;Key Laboratory of Advanced Intelligent Protective Equipment Technology at Hebei University of Technology,Ministry of Education,Tianjin 300401,China;State Key Laboratory of Reliability and Intellectualization of Electrical Equipment Co-built by Hebei University of Technology,Tianjin 300401,China)
出处
《航天器环境工程》
2025年第1期73-84,共12页
Spacecraft Environment Engineering
基金
国家自然科学基金青年科学基金项目(编号:52203085)
河北省自然科学基金面上项目(编号:E2024202124)
河北省教育厅中央引导地方科技发展资金项目(编号:236Z1208G)。
