| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Outline of Final Research Achievements |
In terms of resource saving and lowering environmental load, understanding and controlling of friction is becoming important. We have been studying the friction across nanometer thick liquid films at the molecular level using a resonance shear measurement (RSM), which we have developed. In this project, we developed RSM to apply solid lubrication. By designing of springs for force detection and the direct measurement of moving parts in the oscillating unit, the accuracy of parameter determination through physical model analysis was improved. We also proposed the procedure to evaluate the friction, sliding amplitude and sliding velocity using obtained parameters. The developed method was applied for friction between polymer hydrogel and silica sphere. It was revealed that the friction of the gel was mainly from the elasticity of the deformed interface, which was not evaluated in previous studies. This knowledge is quite important for designing the gel based lubrication materials.
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