Investigation of the effects of surface water film and hierarchical solid texture on the hydrophilicity of ceramics surface
| Project/Area Number |
21360317
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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 |
Inorganic materials/Physical properties
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
NAKAJIMA Akira 東京工業大学, 大学院・理工学研究科, 教授 (00302795)
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| Co-Investigator(Kenkyū-buntansha) |
ISOBE Toshihiro 東京工業大学, 大学院・理工学研究科, 助教 (20518287)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2010: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2009: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
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| Keywords | 表面 / 酸化チタン / 親水性 / 光触媒 / ヘテロポリ酸 / 暗所維持性 / ルチル / 摩擦力 / AFM / 水膜 / 接触角 / 線張力 |
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| Research Abstract |
Effects of surface water film and hierarchical solid texture on the highly hydrophilic surface was investigated using various TiO2 samples and probe microscopy. When UV was irradiated onto the surface of polycrystalline rutile ceramics, the friction force first increased and then decreased. Once the water contact angle of the rutile surface reached the lower limit, the friction force increased gradually. Increased friction force was attributable to decomposition of the surface organic contaminant and subsequent friction force decrease and gradual increase are attributed to water adsorption. From the force curve measurement, the thickness of water layer was estimated as 2. 3 nm separation. Moreover, an excellent photoinduced hydrophilicizing rate and the sustainability of hydrophilicity were obtained from the brookite-heteropolyacid hybrid films. The mechanism of these properties was discussed from the viewpoint of hydrophilic points in the solid surface.
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Report
(4 results)
Research Products
(52 results)
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[Presentation] 超濡れ性の設計2010
Author(s)
中島章
Organizer
精密工学会切削加工専門委員会講演会
Place of Presentation
中央大学
Year and Date
2010-09-22
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