Numerical and Experimental Investigation on Photothermal Performance of Polyimide/High-Electrical-Performance-Coating Composite Films Considering Surface Roughness

作     者：JING Peng ZHOU Xiao XU Zhengyang XU Zhiguo JING Peng;ZHOU Xiao;XU Zhengyang;XU Zhiguo

作者机构：School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240 China Sunman(Zhenjiang)Co.LtdZhenjiang 212000China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2022年第31卷第4期

页      面：1206-1219页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Grant No.51576126)。 

主　　题：FDTD composite film surface roughness photothermal property coating material 

摘      要：Polyimide(PI)films are the common and important components on spacecraft for thermal control.Their parameter design accuracy has an important impact on the spacecraft thermal balance but there are few studies focusing on the effect of film surface defects.In the present study,photothermal properties of composite films made of PI films and germanium/indium tin oxide/aluminum coatings are obtained by UV-VIS-NIR spectrophotometer.The film surface morphology of composite films is obtained by the atomic force microscope.The present study creatively introduces surface roughness into modeling from the perspective of finite-difference time-domain(FDTD)model.The FDTD method considering surface roughness is used to present a comprehensive investigation on the coating effect on the photothermal properties including transmittance and reflectance of composite films.Based on the random rough surface generated by root-mean-square(RMS)roughness and correlation length,the FDTD method is applied to characterize the electromagnetic field of composite films.It has been found that the numerical accuracy is greatly improved and the numerical results agree well with the experimental data when surface roughness is considered.The results also show that coating material and thickness have remarkable impacts on photothermal properties of the composite films.