Surface tension of flowing soap films
Surface tension of flowing soap films
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流动肥皂膜的表面张力
DOI：
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发表时间：
2017
影响因子：
3.7
通讯作者：
Ildoo Kim
中科院分区：
文献类型：
--
作者：
Aakash Sane;S. Mandre;Ildoo Kim
流动肥皂膜的表面张力是根据膜厚度和肥皂溶液浓度来测量的。我们通过测量束缚肥皂膜通道的尼龙线的曲率来执行此测量，并使用测量的曲率来参数化表面张力和线张力之间的关系。我们发现，当膜较薄或由低浓度的皂液制成时，皂膜的表面张力会增加；否则，它接近渐近值 $30~ ext{mN}~ ext{m}^{-1}$ 。只有两个参数的简单吸附模型很好地描述了我们的观察结果。通过测量，我们还能够估计皂膜的吉布斯弹性。
The surface tension of flowing soap films is measured with respect to the film thickness and the concentration of soap solution. We perform this measurement by measuring the curvature of the nylon wires that bound the soap film channel and use the measured curvature to parametrize the relation between the surface tension and the tension of the wire. We find that the surface tension of our soap films increases when the film is relatively thin or is made of soap solution of low concentration; otherwise, it approaches an asymptotic value of $30~ ext{mN}~ ext{m}^{-1}$ . A simple adsorption model with only two parameters describes our observations reasonably well. With our measurements, we are also able to estimate the Gibbs elasticity of our soap film.