分离夹层有水玻璃所需较大拉力的产生原理与影响因素

Formation Principle and Influence Factors of the Force Required to Separate Two Sheets of Glass with a Thin Layer of Water between Them

摘要: 两块玻璃之间夹有一层薄薄的水并紧贴在一起，则需要用较大的力才能将两者分离，此拉力远大于分离干燥玻璃所需拉力。本文分析了夹层有水玻璃的受力情况，从大气压与表面张力的角度推导出分离玻璃所需拉力的理论表达式，得出拉力主要取决于水与玻璃间表面张力系数、水层面积以及边缘液面曲率半径的结论，并进行了实验验证。最后，本文还对分离拉力与夹层水量、玻璃材质等影响因素的关系进行了实验探究。

Abstract: Put a thin layer of water between two sheets of glass and try to separate them, it could be found that the force required was much larger than the one when the water layer did not exist. Based on the effect of atmosphere and surface tension, the formula for the pulling force required was derived and obtained, which has come to a conclusion that the force would mainly depend on the surface tension coefficient between water and glass, the area of water layer, and the curvatures of the water layer’s edge. Furthermore, experiments were executed to verify the correctness of theory and investigate the influence of the volume of water as well as the glass material.