水平平板下に形成された二次元メニスカスのぬれ挙動 : 固体面の微小あらさを考慮した微視的見地からの解析

概要

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The wetting behavior of a two-dimensional liquid meniscus fomred under a horizontal plate was investigated theoretically. In the previous report, we considered the wetting mechasism from a macroscopic viewpoint ; that is, we assumed that Young's equation could be applied to the apparent macroscopic wetting problem. In this report, in order to substantiate the assumption made in a previous report, the same problem was analyzed precisely from a microscopic viewpoint when there existed infinitesimal two-dimensional roughnesses on the horizontal plate. The thermodynamic energy change of the system with the meniscus moving along the roughend surface was calculated. When the apparent macroscopic angle between the meniscus and the plate was equal to the advancing or receding contact angle, the system became unstable. This result agreed with that of the previous report. The assumption that Young's equation could be used macroscopically was verified by this precise analysis.
1989-08-25