The sliding friction of various kinds of hydrogels has been studied and it was found that the frictional behaviors ofthe hydrogels do not conform to Amonton's law F=μW which well describes the friction of solids. The frictional force andits dependence on the load are quite different depending on the chemical structures of the gels
surface properties of theopposing substrates
and the measurement condition. The gel friction is explained in terms of interracial interaction
either attractive or repulsive
between the polymer chain and the solid surface.According to this model
the friction is ascribed to the viscous flow of solvent at the interface in the repulsive case.In the attractive case
the force to detach the adsorbing chain from the substrate appears as fricition.The surface adhesion between glass particles and gels measured by AFM showed a good correlation with the friction
which supported the repulsion-adsorption model proposed by the authors.
Abstract
The sliding friction of various kinds of hydrogels has been studied and it was found that the frictional behaviors ofthe hydrogels do not conform to Amonton's law F=μW which well describes the friction of solids. The frictional force andits dependence on the load are quite different depending on the chemical structures of the gels
surface properties of theopposing substrates
and the measurement condition. The gel friction is explained in terms of interracial interaction
either attractive or repulsive
between the polymer chain and the solid surface.According to this model
the friction is ascribed to the viscous flow of solvent at the interface in the repulsive case.In the attractive case
the force to detach the adsorbing chain from the substrate appears as fricition.The surface adhesion between glass particles and gels measured by AFM showed a good correlation with the friction
which supported the repulsion-adsorption model proposed by the authors.
关键词
Keywords
references
The trial reading is over, you can activate your VIP account to continue reading.