| Project/Area Number |
22710093
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nanostructural science
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | トライボロジー / 表面・界面物性 / 固-液界面 / 吸着 / 潤滑 / 表面･界面物性 |
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| Research Abstract |
We have revealed that alcohols and carboxylic acids, which have hydrogen-bonding groups, adsorbed on a silica surface in a nonpolar liquid, cyclohexane, forming ordered structures extending from ten to several tens of nanometers through hydrogen bonding between the surface silanol groups and alcohols (or carboxylic acids) as well as between alcohols (or carboxylic acids), which we call surface molecular macroclusters. We also found that the strong repulsive force appeared at the surface separation below ca. 5 nm when the molecular macrocluster layers were formed. This phenomenon realizes the high resistance to the normal load with low viscosity liquids, which are required for the lubricants. In this study, we aimed to regulate the structure and properties of molecular macrocluster layers based on the kind of adsorbing molecule, and to establish the new lubrication mechanism based on the structuring of liquid adsorbed at the solid-liquid interface.
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