Velocity dependence of friction and hydrogen bonding effects
Physical review letters, 2006•APS
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.
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.
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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