Abstract
Organogels are attractive formulations in cosmetics, food, and pharmaceuticals. They exhibit characteristic frictional and mechanical responses during the collapse of a mesostructure. In this study, the friction dynamics of organogels composed of five different waxes (paraffin wax, microcrystalline wax, ceresin, candelilla wax, and carnauba wax) and liquid paraffin were evaluated using a sinusoidal motion friction evaluation system. All organogels exhibited a velocity dependence of friction coefficient that increased with the acceleration of the contact probe. Depending on the ease of the crystal formation of the waxes in liquid paraffin, hydrocarbon-based waxes formed soft organogels with a low-friction coefficient, whereas ester-based, highly polar waxes formed organogels that were hard and had a high-friction coefficient.
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