Journal
APPLIED SURFACE SCIENCE
Volume 535, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147654
Keywords
Janus; Polyimide; Film; AO resistance; Mechanical property
Categories
Funding
- National Natural Science Foundation of China [51903208]
- China Postdoctoral Science Foundation [2019M653733]
- Fundamental Research Funds for the Central Universities [31020180QD127, 3102017JC01001]
- Joint Fund Project in Shaanxi Province of China [2019JLM-22, 2019JLM-4]
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The study presents a janus polyimide composite film that can withstand atomic oxygen erosion in low-earth orbit environments, with excellent AO resistance and mechanical performance, high transmittance, intact surface morphology, and potential for spacecraft surface protection blankets.
Polyimide films are required onboard spacecrafts withstanding atomic oxygen (AO) erosion in low earth orbit environment. We report a janus polyimide composite film consisting of HBPSi enriched and scanty surfaces/sides. This unique structure ensures both outstanding AO resistance-with relative mass loss merely 8.34% that of standard Kapton H-and admirable mechanical performance with ultimate tensile strength as high as ca. 89 MPa and fracture toughness up to 5.22 M,Jm(-3). Besides, janus polyimide composite films are good at maintaining its surface morphology and integrity upon AO attack, showing a higher transmittance after AO exposure (ca. 82% at 600 nm) and lower root mean square roughness (RMS) value (5.14 nm vs. 6.62 nm) in comparison to its monolayered counterpart. These janus polyimide films demonstrate exceptional performance and thus show great potential for making surface protective blanket for spacecrafts functioning in space environment.
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