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- W2029972401 abstract "We studied the ability of surfactants to reduce friction by boundary lubrication for a bulk hydrogel sliding on a solid surface in an aqueous solution. A piece of negatively charged polyelectrolyte hydrogel was slid across solid surfaces with various levels of hydrophobicity, using a strain-controlled parallel-plate rheometer in water. A dramatic reduction in the sliding friction, especially in the low velocity region, was detected by the addition of a surfactant to the water medium. This friction reduction was only observed in gel-solid friction but not in solid-solid friction, indicating that the soft and wet nature of the gel surface was crucial for this surfactant-induced friction reduction. This phenomenon reveals that surfactants can remain at the gel-mated interface, thus preventing direct interfacial interaction between the sliding surfaces, and significantly decreasing the frictional stress. The reported dramatic reduction in friction highlights the frictional characteristics of soft and wet hydrogel materials." @default.
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- W2029972401 date "2011-06-27" @default.
- W2029972401 modified "2023-10-07" @default.
- W2029972401 title "Surfactant-induced friction reduction for hydrogels in the boundary lubrication regime" @default.
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- W2029972401 doi "https://doi.org/10.1088/0953-8984/23/28/284107" @default.
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