Mitani S, Sakai K
Institute of Industrial Science, University of Tokyo, Tokyo, Japan.
Rev Sci Instrum. 2012 Jan;83(1):015101. doi: 10.1063/1.3673473.
A revolving drop surface tensiometer, which measures the surface tension of a small amount of liquid, is proposed. A remarkable feature of this device is that while using the pendant drop method, it employs a centrifugal force to deform the liquid droplet. The centrifugal force induces a large distortion of the droplet, which enables an accurate measurement of the surface tension to be made. In our experimental setup, the centrifugal force can be increased so that the apparent acceleration becomes up to 100 times larger than that due to gravity, and the capability of this method to measure surface tensions was demonstrated with ethylene glycol.
提出了一种用于测量少量液体表面张力的旋转滴表面张力仪。该装置的一个显著特点是，在使用悬滴法时，它利用离心力使液滴变形。离心力会使液滴产生较大变形，从而能够精确测量表面张力。在我们的实验装置中，可以增加离心力，使表观加速度比重力加速度大100倍，并且用乙二醇证明了这种方法测量表面张力的能力。
