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Surface treatment of 25‐μm Kapton film by ammonia for improvement of TiO 2 /SiO 2 coating's adhesion
Author(s) -
Man Yanru,
Li Zhonghua,
Shu Ming,
Liu Kai,
Liu Huitao,
Gao Yuan
Publication year - 2017
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6231
Subject(s) - kapton , materials science , contact angle , polyimide , coating , wetting , layer (electronics) , composite material , analytical chemistry (journal) , chemistry , chromatography
Due to a smooth hydrophobic surface of Kapton film, it is very difficult to coat an inorganic oxide coating on its surface. In this study, the surface of Kapton was treated by NH 3 ·H 2 O and silicon coupling agent to improve the polymer surface wettability. Changes in surface hydrophilicity were studied by contact angle measurement. The samples were irradiated by atomic oxygen (AO) in a ground‐based simulation system. TiO 2 /SiO 2 multi‐layer coatings were prepared on the surface of Kapton by sol–gel method to resist AO erosion. The optical transmittance and surface morphology of samples were investigated by UV–vis spectroscopy and scanning electronic microscope. The results indicated that the TiO 2 /SiO 2 sol could easily form a uniform thin coating on the surface of pretreated Kapton. After AO exposure, the coatings became more compact, without peeling off. The AO erosion yield value of coated Kapton was sharply down, and the samples had good optical transparency. Copyright © 2017 John Wiley & Sons, Ltd.