Effect of surface hydrophilicity and water vapor pressure on the interfacial shear strength of adsorbed water layer
Effect of surface hydrophilicity and water vapor pressure on the interfacial shear strength of adsorbed water layer
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DOI：
10.1063/1.1675933
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发表时间：
2004-03
影响因子：
4
通讯作者：
Doo-in Kim;H. Ahn;D. Choi
中科院分区：
文献类型：
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作者：
Doo-in Kim;H. Ahn;D. Choi
我们研究了水蒸气压和表面亲水性对无磨损滑动条件下摩擦学行为的影响。在不同的水蒸气压力条件下，检查了具有不同水亲和力（接触角<5°、30°和85°）的硅表面与玻璃球（接触角40°）的摩擦和界面剪切强度。亲水表面的摩擦力随着蒸气压的增加而减小，并且无论相对蒸气压如何，最不亲水的表面都表现出稳定且低的摩擦力。然而，它表明，具有高相对蒸气压的亲水表面比亲水性较低的表面表现出更低的剪切强度，而与毛细管效应无关。它是根据毛细管润湿和接触区域吸附水的作用来解释的。
We investigated the effect of water vapor pressure and surface hydrophilicity on the tribological behavior in wearless sliding condition. Friction and interfacial shear strength of silicon surfaces with different water affinity (contact angles of <5°, 30°, and 85°) against a glass sphere (contact angle 40°) were examined under various water vapor pressure conditions. The friction of hydrophilic surface decreased as vapor pressure increased and the least hydrophilic surface showed stable and low friction force regardless of relative vapor pressure. However, it showed that the hydrophilic surface with high relative vapor pressure exhibited lower shear strength than a less hydrophilic surface independent of capillary effect. It was explained in terms of capillary wetting and the role of adsorbed water in contact area.