FRICTIONAL-PROPERTIES OF SKIN

[摘要] To gain a more fundamental understanding of frictional properties of human forearm skin, various parameters (hydration, oils, surfactants, etc.) affecting skin friction were evaluated using a rotational friction technique. The rotational device utilized a motor-driven wheel. The wheel and drive shaft were connected to the motor through a flexible rubber coupling in such a way that friction encountered by the wheel caused a lateral displacement of the drive shaft which was monitored by a photocell and recorded on a strip-chart recorder. Observations suggested that separate frictional events occured when materials are applied to the skin surface. The increase in friction observed upon wetting the skin involved 2 distinct phenomena.sbd.one was related to the surface tension of the aqueous phase, while the other, closely associated with hydration was a consequence of physicochemical adhesion of the skin to the rotational friction probe.