高比表面积5A沸石分子吸附热控涂层的制备及性能测试  

Preparation and performance of high specific surface area zeolite 5A molecular adsorption thermal control coating

作　　者：苑秀芝 周岩 康红军 李杨 吴晓宏 YUAN Xiuzhi;ZHOU Yan;KANG Hongjun;LI Yang;WU Xiaohong(School of Chemical Engineering and Chemistry,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学化工与化学学院,哈尔滨150001

出　　处：《航天器环境工程》2024年第5期602-609,共8页Spacecraft Environment Engineering

基　　金：国家重点研发计划项目(编号:2022YFB3806300)。

摘　　要：为了提高微孔分子吸附涂层的吸附能力,采用超低浓度氟化铵甲醇溶液刻蚀5A沸石来提高其比表面积和微孔体积,并通过喷涂工艺制备高比表面积5A沸石分子吸附热控涂层。测试结果表明:经氟化铵质量分数为0.01%的甲醇溶液刻蚀后,5A沸石的比表面积从603.6717 m^(2)·g^(-1)提高到703.0888 m^(2)·g^(-1),总微孔体积从0.2256 cm^(3)·g^(-1)提高到0.2702 cm^(3)·g^(-1);所制备涂层的吸附量从2.0922 mg·cm^(-2)提高到2.4382 mg·cm^(-2);涂层的热控性能、高低温循环稳定性均满足航天器热控涂层在空间环境应用的技术要求。研究结果可为高性能空间分子污染吸附材料的制备提供参考。In order to improve the adsorption capacity of microporous molecular adsorption coatings,an ultra-low concentration methanol ammonium fluoride solution was utilized to etch zeolite 5A to enhance its specific surface area and micropore volume.A high specific surface area zeolite 5A molecular adsorption thermal control coating was then prepared by spraying process.The test results showed that after being etched with 0.01wt%methanol ammonium fluoride solution,the specific surface area of zeolite 5A increased from 603.6717 m^(2)·g^(-1)to 703.0888 m^(2)·g^(-1),and the total micropore volume increased from 0.2256 cm^(3)·g^(-1)to 0.2702 cm^(3)·g^(-1).The adsorption capacity of the prepared coating increased from 2.0922 mg·cm^(-2)to 2.4382 mg·cm^(-2).These coatings’thermal control performance and high/low temperature cycling stability both met the technical requirements for spacecraft thermal control coatings in space.The proposed study may offer a reference for the development of high-performance space used molecular contamination adsorption materials.

关 键 词：分子吸附涂层 分子污染 5A沸石 比表面积 微孔体积 氟化铵甲醇溶液 刻蚀 

分 类 号：O552.33[理学—热学与物质分子运动论] V520[理学—物理]