Static Friction of Agar Gels: Formation of Contact Junctions at Frictional Interface
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- Nitta Takahiro
- Division of Physics, Graduate School of Science, Hokkaido University
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- Kato Hideaki
- Division of Physics, Graduate School of Science, Hokkaido University
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- Haga Hisashi
- Division of Biological Sciences, Graduate School of Science, Hokkaido University
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- Nemoto Koji
- Division of Physics, Graduate School of Science, Hokkaido University
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- Kawabata Kazushige
- Division of Biological Sciences, Graduate School of Science, Hokkaido University
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Description
We measure the static friction Fc of agar gels on glass substrates immersed in water. Fc is independent of the nominal contact area, and increases with the normal load and the duration tw of contact prior to sliding. Using a confocal laser-scanning microscope, many fine dark spots are clearly visible in the optical reflection distribution images on the glass interface in contact with the gel. The total area of the dark spots increases with tw, corresponding qualitatively to that of Fc. These observations indicate that Fc originates from the formation of the contacting spots at the interface, which is not due to asperities of the gel surface alone but related to the drainage of water trapped by the gel polymer network at the frictional interface.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 74 (11), 2875-2879, 2005
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679163152768
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- NII Article ID
- 110002325511
- 130004539019
- 210000105713
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- NII Book ID
- AA00704814
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- BIBCODE
- 2005JPSJ...74.2875N
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 7699172
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed