Institute of Sport Science, ASICS Corporation, 6-2-1, Takatsukadai, Nishi-ku, Kobe, Hyogo, 651-2271, Japan.
Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki Aza-Aoba, Aoba-ku, Sendai, 980-8579, Japan.
Sci Rep. 2022 Jan 7;12(1):267. doi: 10.1038/s41598-021-04102-0.
High slip-resistant footwear outsoles can reduce the risk of slip and fall on wet and icy surfaces. Falls on wet and icy surfaces can cause serious life-threatening injuries, especially for older adults. Here we show that footwear outsoles using the rubbers filled with activated carbon or sodium chloride produce higher friction force and reduce the slip rate in walking. We have identified that small depressions were formed on outsole materials filled with activated carbon or sodium chloride during friction between the rubber and surface leading to some air ingress into the interface. While there are air bubbles between the rubber and surface, real contacts are surrounded by water with negative pressure (Laplace pressure). It is considered that the negative pressure promotes real contact formation, which causes high friction. We consider that the outsole materials filled with activated carbon or sodium chloride can reduce the risk of slip-and-fall accidents.
高防滑鞋底可以降低在湿滑和冰面滑倒的风险。在湿滑和冰面滑倒可能会导致严重的危及生命的伤害，尤其是老年人。在这里，我们表明，使用填充有活性炭或氯化钠的橡胶制成的鞋底可以产生更高的摩擦力，并降低行走时的滑倒率。我们已经确定，在橡胶和表面之间的摩擦过程中，填充有活性炭或氯化钠的鞋底材料上形成了小凹坑，导致一些空气进入界面。虽然橡胶和表面之间存在气泡，但实际接触区域周围是带有负压（拉普拉斯压力）的水。可以认为，负压促进了实际接触的形成，从而产生了高摩擦力。我们认为填充有活性炭或氯化钠的鞋底材料可以降低滑倒和跌倒事故的风险。
