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Published on: March 31, 2018
Velocity dependence of friction and hydrogen bonding effects
Jinyu Chen1, Imma Ratera, Jeong Young Park
1Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, Berkeley California 94720, USA.
Abstract:
We show that the friction force varies with the sliding velocity in a manner that depends on the chemical nature of the interface. Surfaces terminated with the hydrogen acceptor and donor moieties capable of forming H-bond networks exhibit a friction that decreases with sliding velocity, a behavior that is opposite to that of surfaces where no such networks can form. We explain the results with a model where the domains of glassy H-bond networks are disrupted at a critical applied stress leading to slippage.
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