Measurements for load capacitance of fluid film lubrication with diffused electric double layer
| Project/Area Number |
18560127
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
MOMOZONO Satoshi Tokyo Institute of Technology, Graduate School of Science and Engineering, Assistant Professor (70262300)
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| Co-Investigator(Kenkyū-buntansha) |
KYOGOKU Keiji Tokyo Institute of Thchnology, Graduate School of Science and Engineering, Professor (70153236)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,860,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥360,000)
Fiscal Year 2007: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Tribology / Nanotribology |
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| Research Abstract |
Hydrodynamic lubrication has the effect of reducing friction except at a low speed. Since molecular attractive force (i.e. van del Waals force) has been predominant effect in micro-nanoscopic system, hydrodynamic load capacitance has not been enough to avoid direct contact between surfaces in low velocity condition. "Stiction" is an example. It is important that development of new lubrication mechanism for MEMS in liquid. Head investigator proposed a new mechanism using electric double layer. It was simulated numerically as result that repulsive force has been taken effect at 10 to 100 nanometers gap between surfaces.
In this study, load capacitance has been measured by SPM (Scanning Probe Microscope), for influences of probe radius, applied voltage, kind and concentrations of ion and distance between surfaces for consideration of ability of nano-lubrication by electrical double layer.
SPM has been modified for measurements of normal and frictional force in liquid. A spherical epoxy resin has been pasted at the top of probe tip with sputter-deposited 10nm Au film. Ionic liquid, which is candidate for future lubrication, has been used. Characteristics of repulsive force measured at 10 to 150 mv voltage have been investigated.
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Report
(3 results)
Research Products
(3 results)
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[Presentation] イオン液体の電気二重層反発力に関する研究2007
Author(s)
制野大輔, 桃園聡, 京極啓史, 中原綱光
Organizer
日本設計工学会 平成19年度春季研究発表講演会
Place of Presentation
(関東学院大学)横浜
Year and Date
2007-05-27
Description
「研究成果報告書概要(和文)」より
Related Report
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