Microscopic design of tactile sense-oriented materials based on the state of water

本研究的目的是建立触觉导向材料的微观设计方法，并考察触觉与物体材料微观物理行为之间的关系。在护肤配方中，人体皮肤的润湿性对触觉的影响很大，润湿性是用接触角定量测量的。样品的流变特性还受到样品对人体皮肤的润湿性的影响。此外，我们还研究了两种具有统计上相似的内部结构的触觉感觉之间的差异，但产生的感觉，舒适和不舒服，如“湿润”和“粘性”的触觉感觉。“湿润”的感觉得分与样品的接触角密切相关，而“粘性”的感觉得分与粘附性相关，表明两种感觉是由不同的界面物理相互作用引起的。

The objective of this study is to establish the method for microscopic design the tactile sense-oriented materials, and we examined the relation between tactile sensation and microscopic physical behavior of the object materials. In the skin care formulations, the wettability, which was quantitatively measured by the contact angle, of the human skin highly effects on the tactile sense. The rheological property of the sample is also affected by the wettability of the human skin by the samples. In addition, we investigated the difference between two tactile senses that has statistically similar inner structure but induce much different sensations, comfort and discomfort, such as tactile feelings of "moistness" and "sticky". The sensory score of "moistness" strongly related to the contact angle of the sample, whereas that of "sticky" related to the adherability, showing the two sensations are induced by different interfacial physical interactions.