| Project/Area Number |
10450257
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Structural/Functional materials
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| Research Institution | Nagoya University |
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Principal Investigator |
TAKAI Osamu Nagoya Univ., Materials Proc. Eng., Professor, 工学研究科, 教授 (40110712)
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| Co-Investigator(Kenkyū-buntansha) |
HOZUMI Atsushi National Industrial Research Institute of Nagoya, Ceramic Technology, Researcher, セラミックス応用部, 研究員
INOUE Yasushi Nagoya Univ., Materials Proc. Eng., Research Associate, 工学研究科, 助手 (10252264)
SUGIMURA Hiroyuki Nagoya Univ., Materials Proc. Eng., Associate Professor, 工学研究科, 助教授 (10293656)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥11,100,000 (Direct Cost: ¥11,100,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1998: ¥9,100,000 (Direct Cost: ¥9,100,000)
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| Keywords | water repellent / plasma CVD / surface morphology / organosilicon compound / hard coating / transparent / adhesiveness / low-tempareture preparation |
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| Research Abstract |
This research project aimed at an establishment of a method to control both the surface morphology and the chemical bonding states of the water-repellent films in plasma CVD processes and at a development of a technique ton deposit transparent, hard and super water-repellent films at low temperature over wide area.
We succeeded in in-situ measurement of infrared (IR) absorption spectra by infrared reflection absorption spectroscopy (IRRAS) at an incident angle of 80 degree using an rf plasma CVD system combined with a Fourier-transform infrared spectrometer (FTIR). Especially, selecting p-polarized IR light lead to measurement at a high sensitivity. We could obtain IR spectra even for a monolayer of organsilicon molecules. By means of this method, we established a deposition technique to control the chemical bonding states of the films in real time.
It has been supposed that super water-repellent films cannot be synthesized with mixture of an oxygen has gas because of formation of hydrophobic Si-OH groups. We made clear, however, that super water repellency can be realized at relatively higher total pressure, in the range of 150-200 Pa, with the mixture of oxygen. From this result, it can be expected that the formation of water-repellent films with hardness. The films have super water-repellency although they include Si-OH functional groups. The reason has not been elucidated and can be an interesting research object.
The water repellency was observed by means of environmental scanning electron microscope. The contact angle was over 150 degree even for the water drops in μm size.
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