Abstract
A plastic plate made of polycarbonate (PC) was functionalized as a water-repellent nature by unbalanced radio-frequency(rf) magnetron plasma sputtering using polytetrafluoroethylene target. In order to build the unbalanced rf magnetron plasma, 3D magnetic field analysis is simulated at three setups using ferrite, samarium cobalt and neodymium magnets so that the combination of ferrite and neodymium magnets is selected. A thin film is prepared on the PC plate at argon gas pressures of 2 and 50 Pa and rf input powers of 50, 100, 150 and 200 W. The functionalized PC surface has resulted in hydrophobic nature, that is, a water contact angle is higher than 90 degree, at all experimental conditions. It is found that the water contact angle is independent with rf power at approximately 108 degree at low pressure of 2 Pa, whereas it gradually increases with increasing rf power from 104 to 112 degree at high pressure of 50 Pa. These surfaces were analyzed by X-ray photoelectron spectroscopy (XPS) analysis. The ratio of F 1 s component to all components of C 1 s, O 1 s and F 1 s from XPS spectra for 2 Pa was higher than that for 50 Pa.
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The work was financially supported by JKA and its promotion funds from AUTORACE, JSPS KAKENHI Grant Numbers JP19K03784 and Joint Research of Ocean Energy from Institute of Ocean Energy, Saga University. The authors would like to thank RENIAS Co. Ltd for the gratuitous offer of the polycarbonate plates.
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Ohtsu, Y., Ino, Y., Fujio, Y. et al. Preparation of Water-Repellent Film on a Plastic Plate by Unbalanced Radio-Frequency Magnetron Plasma Sputtering Using PTFE Target for a Next-Generation Automobile Window. Plasma Chem Plasma Process 41, 1631–1646 (2021). https://doi.org/10.1007/s11090-021-10204-4
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DOI: https://doi.org/10.1007/s11090-021-10204-4