Abstract
The friction behavior of rubber is sensitive to real contact formation, especially on flat floors, and it can be determined by the wetting distribution (uniform or non-uniform). Here, we investigated the friction behavior and contact condition between a rubber hemisphere and a glass plate under non-uniform wetting conditions with water droplets in air and air bubbles in water. The experimental results indicated that the friction coefficient and real contact area for non-uniform wetting conditions were higher than for uniform wetting conditions without water droplets and air bubbles. Considering non-uniform wetting, a dewetting theory was developed that explains promotion of real contact formation.
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