Formation of Nano-Textured Polymeric Lubricant Films Using Ultraviolet Irradiation

To create functionalized tribological surfaces utilizing the effect of nano-textures, we have proposed a method in which nanometer-thick perfluoropolyether lubricant films coated on solid surfaces were irradiated with 172 nm ultraviolet (UV) rays through a photo mask in nitrogen atmosphere. By measu...

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Published inNihon Kikai Gakkai ronbunshū. C Vol. 18; no. 6; pp. 1927 - 1935
Main Authors Zhang, Hedong, Mitsuya, Yasunaga, Fukuoka, Natsuko, Imamura, Masashi, Fukuzawa, Kenji
Format Journal Article
LanguageJapanese
Published 01.06.2006
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Summary:To create functionalized tribological surfaces utilizing the effect of nano-textures, we have proposed a method in which nanometer-thick perfluoropolyether lubricant films coated on solid surfaces were irradiated with 172 nm ultraviolet (UV) rays through a photo mask in nitrogen atmosphere. By measuring the thickness profiles of the lubricant films at the boundary of non-UVirradiated and UV-irradiated areas, we found that lubricant molecules in the non-UV-irradiated area spread toward the UV-irradiated area with time and stable concave-convex film structures are obtained at the equilibrium state. We experimentally demonstrated that desirable three-dimensional lubricant textures can be formed using this UV-induced lubricant spreading (lubricant redistribution) phenomenon. The optimum conditions for forming lubricant textures are also discussed.
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ISSN:0387-5024