Preparation of two-component hybrid polyimide film for atomic oxygen erosion resistance. (June 2021)

• Record Type: Journal Article
• Authors: Zhao, Yizhi; Zhao, Xiaohu; Shen, Zhigang; Zhang, Xiaojing
• Is Part Of: Materials today communications. Volume 27(2021)
• Publication Date: 2021-06
• Subjects: Atomic oxygen -- Polyimide -- Film -- SiO2 -- Al2O3 -- Sol–gel method; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.102141
• Languages: English
• ISSNs: 2352-4928

Abstract

Highlights: The oxygen-atom erosion resistance of SiO2 –Al2 O3 composite PI film with different doping ratios was studied. Two preparation methods of sol–gel method and physical blending method were compared. Two-component materials have obvious advantages over single-component materials in AO resistance. The AO resistance first increases and then decreases as the ratio of Al2 O3 /SiO2 increases. Abstract: Searching for a method for simple and low-cost preparation of polyimide (PI) composite film and exploring their atomic oxygen (AO) erosion resistance properties are highly important. For the first time we studied the AO erosion resistance of SiO2 –Al2 O3 doped composite PI film, and the associated sol–gel method and physical blending method were compared. After exposure to AO, all the nanocomposite film shows enhanced AO erosion resistance. Especially, a loading of 7.5 wt% SiO2 –2.5 wt% Al2 O3 can decrease the AO induced mass loss by 81% when compared to the pure PI, i.e. the AO resistance was increased by 4–5 times. It is found that with the same doping content, the AO resistance of the two-component (SiO2 –Al2 O3 ) hybrid PI film is notably higher than that of the single component one. The mechanism could be attributed to the SiO2 –Al2 O3 synergistic effect which induces a more stable protective layer on the material surface. The two-component PI composite film with enhanced AO resistance shows promise in the space applications where AO erosion has to be avoided.