Analysis of the Influence of Space Environmental on the Thermal Radiation Performance and Surplus of a Multilayer Insulation

Thermal shock, space combined irradiation test, and humidity test were carried out on one type of multilayer insulation. We summarized and analyzed the change in solar absorptance and hemispheric emittance before and after the environmental test. At the same time, the thermal stability and vacuum pollution characteristics were investigated by thermal weightlessness test and thermal vacuum outgassing test. The results show that the change in thermal radiation performance before and after the environmental test is no more than 0.02, the heat resistance is 350 °C, TML is 0.50%, and CVCM is 0.05% at 135 °C. It is observed that the thermal radiation performance of the material is hardly degraded by thermal shock, and humidity and space combined irradiation. The multi-layer insulation shows good thermal radiation characteristics, thermal stability, and low space pollution characteristics.