Nanotribology of Symmetric and Asymmetric Liquid LubricantsReport as inadecuate




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Tokyo Research Laboratories, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 131-8501, Japan





Abstract When liquid molecules are confined in a narrow gap between smooth surfaces, their dynamic properties are completely different from those of the bulk. The molecular motions are highly restricted and the system exhibits solid-like responses when sheared slowly. This solidification behavior is very dependent on the molecular geometry shape of liquids because the solidification is induced by the packing of molecules into ordered structures in confinement. This paper reviews the measurements of confined structures and friction of symmetric and asymmetric liquid lubricants using the surface forces apparatus. The results show subtle and complex friction mechanisms at the molecular scale.

Keywords: nanotribology; friction; surface forces apparatus; confined liquids; lubricants; stick-slip; stiction; confinement-induced phase transitions nanotribology; friction; surface forces apparatus; confined liquids; lubricants; stick-slip; stiction; confinement-induced phase transitions





Author: Shinji Yamada

Source: http://mdpi.com/



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