Journal
APPLIED SURFACE SCIENCE
Volume 255, Issue 6, Pages 3648-3654Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2008.10.009
Keywords
Surface modification; Vacuum ultraviolet (VUV); Oxygen functional groups
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Funding
- JST Innovation Plaza Kyoto
- Japan Science and Technology Agency
- Japan Society for the Promotion of Science (JSPS)
- Japan Science Society
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The surface of cyclo-olefin polymer (COP) was treated with vacuum ultraviolet (VUV) light at 172 nm wavelength to improve the wettability and adhesion properties. Through VUV treatment in air, the terminal groups of the COP surface were oxidized into oxygen functional groups, containing C-O, C=O, and COO components, making the COP surface hydrophilic. The extent of oxygenation was evaluated by XPS and FTIR-ATR spectra, and it was shown that the surface properties, hydrophilicity, and functionalization were dependent on both VUV irradiation distance and irradiation time, which have an effect on the concentration of oxygen functional groups. VUV-light treatment with a short irradiation distance was more effective in introducing oxygen functional groups. (C) 2008 Elsevier B. V. All rights reserved.
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