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基于多环含二氧化和含的二胺多环基的耐原子氧聚胺薄膜的制备和性能

Zhenzhong Wang¹, Xi Ren¹, Yan Zhang¹

¹Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.

|February 10, 2024

概括

新的含聚胺 (PPI) 薄膜为太空探索提供了增强的原子氧阻力和更高的玻璃过渡温度. 这些先进材料,包括来自6FCDA-BADPO的PPI-2,表现出比传统薄膜更好的性能.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
航空航天工程航空航天工程

背景情况:

无色和透明的聚胺 (CPI) 薄膜对于低地球轨道 (LEO) 应用至关重要,需要高原子氧 (AO) 阻力和热耐久性.
传统的含CPI薄膜,就像那些基于6FDA的薄膜一样,在严峻的太空环境中面临AO侵蚀产量和玻璃过渡温度 (T_g) 的限制.
修改CPI属性是必要的,以满足太空探索的苛刻条件.

研究的目的:

开发新型含CPI薄膜,以增强AO电阻和热稳定性.
为了研究使用6FCDA和BADPO单体合成的新型CPI膜的特性.
为了评估开发的薄膜的光学透明度,热性能和AO电阻.

主要方法:

通过聚合含的二化物 (6FDA或6FCDA) 与含的二胺 (BADPO) 来合成有机可溶性树脂.
通过热固化制备两种含聚胺 (PPI) 薄膜,即PPI-1 (6FDA-BADPO) 和PPI-2 (6FCDA-BADPO).
用DSC对PPI薄膜的光学传导度,玻璃过渡温度 (T_g),线性热膨胀系数 (CTE) 和原子氧 (AO) 侵蚀产量 (E_y) 的表征.

主要成果:

这两种PPI膜都保持了高光学透明度 (>80%在450nm).
与PPI-1 (264.3 °C) 相比,PPI-2 (6FCDA-BADPO) 的T_g (311.0 °C) 显著更高,CTE (41.7 × 10-6/K) 较低.
这两种PPI片都表现出了出色的AO抗性,E值 (6.99 × 10-25至7.23 × 10-25厘米/原子) 远低于标准PI片.

结论:

与传统材料相比,新型含CPI薄膜,特别是PPI-2,具有优越的热稳定性和AO抵抗性.
使用6FCDA和BADPO单体有效地提高了CPI薄膜的性能,用于要求高的太空应用.
这些开发的PPI片代表了用于低地球轨道探索的材料的有希望的进步.

关键词:

原子氧是原子的氧气.含有的聚化物含有.在低地球轨道上运行.它们具有光学特性.热特性热特性热特性

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