Although soap films are prone to evaporate due to their large surface to volume ratio, the effect of evaporation on macroscopic film features has often been disregarded in the literature. In this work, we experimentally investigate the influence of environmental humidity on soap film stability. An original experiment allows to measure both the maximum length of a film pulled at constant velocity and its thinning dynamics in a controlled atmosphere for various values of the relative humidity . At first order, the environmental humidity seems to have almost no impact on most of the film thinning dynamics. However, we find that the film length at rupture increases continuously with . To rationalize our observations, we propose that film bursting occurs when the thinning due to evaporation becomes comparable to the thinning due to liquid drainage. This rupture criterion turns out to be in reasonable agreement with an estimation of the evaporation rate in our experiment.

中文翻译：

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蒸发对皂膜破裂的影响

尽管肥皂膜由于其较大的表面积与体积比而易于蒸发，但是蒸发对宏观膜特征的影响在文献中常常被忽略。在这项工作中，我们通过实验研究了环境湿度对肥皂膜稳定性的影响。原始实验可以测量以恒定速度牵拉的薄膜的最大长度，以及在各种相对湿度值的受控气氛下测量薄膜变薄的动力学。乍一看，环境湿度似乎对大多数薄膜减薄动力学几乎没有影响。但是，我们发现断裂膜的长度随着。为了使我们的观察合理化，我们建议当由于蒸发引起的稀化与由于液体排泄引起的稀疏可比时，会发生膜破裂。事实证明，该破裂标准与我们实验中蒸发速率的估计值合理地吻合。