接触角
磁滞
材料科学
表面粗糙度
表面光洁度
表面张力
曲面(拓扑)
润湿
机械
复合材料
凝聚态物理
热力学
几何学
物理
数学
出处
期刊:中国化学工程学报(英文版)
日期:2004-01-01
被引量:1
摘要
Observation and measurement were conducted to investigate contact angle and its hysteresis on rough surface. The experimental results indicate that the increase in solid surface roughness enlarges advancing contact angle and decreases receding contact angle, resulting in enhanced hysteresis. It was observed that when Young's contact angle θY 90°, as the roughness of solid surface increased the extent of the decrease in receding contact angle exceeded that of the increase in advancing contact angle. Based on the experimental observations, the concept of hysteresis tension was introduced to describe the contact angle hysteresis behavior on rough solid surface. The model provides a thoughtful understanding of the physical nature of contact angle hysteresis, in particular an instructive description of the influence of surface roughness on the hysteresis. The prediction of the model is found in quite good agreement with the experimental observation and measurement.
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