Atomic oxygen effects on silvered polyimide films and their surface modification by poly(siloxane amic acid) ammonium salts

Wang Chunbo; Li Liaoliao; Jiang Haifu; Tian Dongbo; Qin Wei; Liu Changwei; Zhao Xiaogang; Chen Chunhai; Wang Daming

doi:10.1039/c8ra03331e

Atomic oxygen effects on silvered polyimide films and their surface modification by poly(siloxane amic acid) ammonium salts

RSC Adv. 2018 Jun 13;8(39):21728-21734. doi: 10.1039/c8ra03331e.

Authors

Wang Chunbo^{1

2}, Li Liaoliao³, Jiang Haifu⁴, Tian Dongbo⁴, Qin Wei⁴, Liu Changwei³, Zhao Xiaogang^{1

2}, Chen Chunhai^{1

2}, Wang Daming^{1

2}

Affiliations

¹ Key Laboratory of High Performance Plastics (Jilin University), Ministry of Education, College of Chemistry, Jilin University Changchun 130012 P. R. China wangdaming@jlu.edu.cn.
² National & Local Joint Engineering Laboratory for Synthesis Technology of High Performance Polymer, College of Chemistry, Jilin University Changchun 130012 P. R. China.
³ Institute of Petroleum Chemistry, Heilongjiang Academy of Sciences Harbin 150040 China.
⁴ Beijing Institute of Satellite Environment Engineering Beijing 100094 China.

Abstract

The tolerance of silvered polyimide films synthesized by an in situ self-metalization method against atomic oxygen (AO) was evaluated. The results showed that the mass loss of R-Ag/PI was markedly increased as the AO fluence increased; Ag/PI showed an identical trend. SEM data showed that the silver particles on the surfaces of R-Ag/PI and Ag/PI disappeared. The surfaces achieved a "carpet condition" that was more obvious as the AO fluence increased. Poly(siloxane amic acid) ammonium salt was synthesized and made via imidization to produce a flexible organic coating that was characterized by ATR-FTIR, ¹HNMR, TGA, and XPS. This could be used to improve the tolerance of silvered polyimide films against AO. The AO resistance and the impacts on mass loss, surface morphology, and surface compositions were also evaluated after surface modification by poly(siloxane amic acid) ammonium salts. 20 wt% Foc/Ag/PI had a lower mass loss and smoother surface than the others due to the formation of a compact surface-SiO₂-type layer. This flexible organic coating can be produced via an environmentally-friendly method, and it maintains the inherent thermal stability of the polyimide which cannot be achieved by other anti-AO coatings.