Journal of Physical Chemistry B, Vol.101, No.28, 5487-5489, 1997
Friction of Gels
The sliding friction of various kinds of hydrogels has been investigated, and it has been found that the frictional behaviors of these hydrogels do not conform to Amonton’s law F = mu W, which well describes the friction of a solid. Instead, the friction force F of the gel shows slight dependence on the load W in the investigated load range, while it strongly depends on the sliding velocity. Additionally, the frictional coefficient mu of the gel reaches a value as low as similar to 10(-3), which is smaller than those observed in solid materials.
Keywords:POLYMER