AN INTERFACIAL TENSIOMETER FOR UNIVERSAL USE.
AN INTERFACIAL TENSIOMETER FOR UNIVERSAL USE.
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DOI：
10.1085/jgp.7.5.625
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发表时间：
1925-05-20
期刊：
影响因子：
--
通讯作者：
du Noüy PL
中科院分区：
文献类型：
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作者：
du Noüy PL
昆克、哈代、麦克.刘易斯、摩根以及最近哈金斯和他的合作者们对液体在界面处的行为进行了大量的研究，似乎没有必要开发一种新的方法来研究这种现象，因为现有的方法已经达到了很高的精度。然而，如果纯液体的界面张力值已经由这些研究者和其他人很好地建立，由于吸附的界面张力随时间的变化--一种类似于我们实验室首次研究的现象--据我们所知，由于缺乏适当的技术，迄今为止还没有研究过。因此，考虑到6年前在该杂志上首次描述的张力计的使用所揭示的新现象的数量，我们认为设计一种类似的仪器可能是有意义的，用这种仪器可以在几秒钟内方便地在任何实验室中测量界面张力。到0.1达因。我们的第一个想法是利用市场上实际存在的张力计，也许对铂金环做了轻微的修改。然而，由于环只能向上拉，它限制了对水界面的测量，即漂浮在水面上的液体;即比重< 1。为了使仪器通用，决定将环固定到刚性支撑件上，以便可以通过扭转丝向下按压以及拉动
The important and fundamental works of Quincke, Hardy, McC. Lewis, Morgan, and lately Harkins and his collaborators have thrown much light on the behavior of liquids at interfaces, and it may seem hardly necessary to develop a new method in order to study this phenomenon, as those existing have reached a high degree of accuracy. However, if the values of the interfacial tensions of pure liquids have been well established by these investigators and others, the changes of the interfacial tension due to adsorption in function of time--a phenomenon similar to that first studied in our laboratoryl--have not, to our knowledge, been studied so far, for lack of proper technique. Consequently, considering the number of new phenomena which were brought to light by the use of the tensiometer first described in this Journal 6 years ago 2 we thought it might be of interest to devise a similar instrument with which measurements of interracial tension could be made in a few seconds, conveniently, in any laboratory, to 0.1 dyne.Our first idea was to utilize the tensiometer as it actually exists on the market, with perhaps a slight modification of the platinum ring. However, as the ring can only be pulled upwards, it limits the measurements for water interfaces, to liquids floating on water; ie, having a specific gravity< 1. In order to render the instrument universal, it was decided to fix the ring to a rigid support, so that it could be pressed down by means of the torsion wire, as well as pulled