原子氧和紫外辐射效应对空间光学系统沸石分子筛吸附性能的影响

Effects of atomic oxygen and ultraviolet radiation on adsorption properties of zeolite in space optical system

针对低轨空间环境下分子筛材料吸附能力变弱造成高精度、超低温光学仪器或者其他精密探测仪器的探测质量和使用寿命受到严重影响的问题,研究低轨环境中,ZSM-5、ZSM-22、MCM-41和SAPO-11四种沸石分子筛辐照前后样品的外观和对水的吸附性能。结果表明:原子氧对四种材料吸附性能几乎没有影响;紫外会严重降低MCM-41吸附性能,吸收比率降低约2.44%,SAPO-11吸收比率增加1.6%,而ZSM-5、ZSM-22吸收比率增加的幅度非常小,可以忽略;与紫外单独辐照相比,原子氧与紫外同时辐照对MCM-41影响不大,而对SAPO-11、ZSM-5影响较大,可以显著增强其吸附能力,吸收比率增加约为1.7%;对四种材料进行烘烤,加热后MCM-41吸收比率恢复为原样品的吸收比率,表明紫外辐照后造成的网络破坏可以通过烘烤修复。

Aiming at the problem that the detection quality and service life of high-precision,ultra-low temperature optical instruments or other precision detection instruments are seriously affected by the weak adsorption capacity of molecular sieve materials in the low orbit space environment,the appearances and adsorption properties of zeolite samples of ZSM-5,ZSM-22,MCM-41 and SAPO-11 in a low orbit environment are studied.The results show that atomic oxygen has almost no effect on the adsorption properties of the four kinds of material,while ultraviolet radiation can seriously reduce the adsorption properties of MCM-41,and the absorption ratio is reduced by about 2.44%,the adsorption properties of the other three kinds of material are increased in different degrees after ultraviolet irradiation.Compared with ultraviolet irradiation alone,atomic oxygen and ultraviolet radiation have little effect on MCM-41,but have a greater effect on SAPO-11 and ZSM-5,the adsorption capacity of SAPO-11 and ZSM-5 is significantly enhanced,and the absorption ratio is increased by approximately 1.7%.Finally,the four kinds of material are baked,the results show that the absorption ratio of MCM-41 is restored to that of the original sample after heating,which indicates that the network damage caused by UV irradiation can be improved by baking,so the damage of MCM-41 by UV irradiation can be repaired.Overall,the four kinds of material can be reused by baking.