Evaluation of Protective Silicone/Siloxane Coatings in Simulated Low Earth Orbit Environment

作者: David P. Dworak , Bruce A. Banks , Christina A. Karniotis , Mark D. Soucek

DOI: 10.2514/1.15787

关键词:

摘要: A protective silicone/siloxane hybrid coating was prepared using a polysiloxane binder and nanophase silicon-oxo clusters. Siloxane clusters were formed in situ from sol-gel precursors during the UV-curing process, which is accomplished through cationic curing mechanism at ambient temperatures. The of methyl-substituted silicone oligomer, siloxane/silicon-oxo phase tetraethoxysilane (TEOS). Alkoxy silane groups also grafted onto oligomer to couple with chain, Scanning electron atomic force microscopy, x-ray photoelectron spectroscopy, UV absorbance/transmittance studies used observe hybrids performance low-Earth-orbit simulators. results show that oxide layer formed, moderate fluence levels (2.22 × 10 21 atoms/cm 2 ) did not exhibit microcracking had appreciable specular transmittance.

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