Preparation and performance test of anti-electrostatic white thermal control coatings for spacecrafts

摘要

White thermal control coatings on the exterior of the spacecraft could reflect sun and radiate heat for it's low solar absorptance and high infrared emissivity(hemispherical emissivity),but the high resistance of the coating may cause charge accumulation on the surface, static discharge may interfere the electronic equipment. So it's essential to develop a coating not only meet the specifications of the thermal design but also be anti-electrostatic. Herein, a kind of coating with low solar absorptance, high infrared emissivity and low volume resistivity was presented. The effects of binder structure, filling surface morphology,formulation and thickness to the optical and resistivity properties were researched. A coating with volume resistivity of less than 1×10~7Ω•m, solar absorptance of approximately 0.24 and hemispherical emissivity of about 0.86 was obtained.