| AVS 63rd International Symposium & Exhibition | |
| Advanced Surface Engineering | Tuesday Sessions |
| Session SE-TuP |
| Session: | Advanced Surface Engineering Poster Session |
| Presenter: | Taiki Kanzawa, Kyoto University, Japan |
| Authors: | T. Kanzawa, Kyoto University, Japan T. Utsunomiya, Kyoto University, Japan T. Ichi, Kyoto University, Japan H. Sugimura, Kyoto University, Japan |
| Correspondent: | Click to Email |
Cyclo-olefin polymer (COP) is an amorphous polymer and has the great optical properties like silica glass.1 Therefore, COP is suitable for microfluidic devices with the optical detection. However, COP is not durable to many organic solvents such as toluene and ether. For utilizing COP to wider range of application fields, this problem must be solved.
Several methods for fabricating the silica-like thin film on polymer substrates have been reported.2,3 We optimized the coating methods to improve organic solvents resistance of COP. Vacuum ultra-violet (VUV) light of 172 nm wavelength was used in order to photochemically activate the hydrophobic surface of COP plate. Then, tetramethylcyclotetrasiloxane (TMCTS), which has similar component to silica, was chemisorbed onto VUV light-irradiated COP surface by vapor phase deposition. Finally, the sample coated with TMCTS thin film was irradiated by using VUV light again.
The X-ray photoelectron spectroscopy (XPS) and the attenuated total reflection Fourier transform infrared spectroscopy (ATR-FT-IR) measurements clearly indicated that TMCTS thin film was converted to silica-like thin film after VUV light-irradiation. Then, we dropped some organic solvents onto the sample coated with silica-like thin film. After evaporation, there were no traces of osmosis, showing the no permeation of organic solvents to bulk polymer. These results showed that coating with silica-like thin fil m greatly i mproved the resistance to organic solvents.
[1] M. Yamazaki, J. Mol. Catal. A: Chem., 213, 81 (2004)
[2] M. Ouyang, C. Yuan, R. J. Muisener, A. Boulares, J. T. koberstein, Chem. Mater., 12, 1591 (2000)
[3] V. -M. Graubner, R. Jordan, O. Nuyken, B. Schnyder, T. Lippert, R. Koetz, A. Wokaun, Macromolecules, 37, 5936 (2004)