EXPERIMENTAL-DETERMINATION OF SPREADING PRESSURE IN SOLID LIQUID VAPOR SYSTEMS

被引:27
作者
BELLONFONTAINE, MN
CERF, O
机构
[1] Laboratoire de Génie de I’Hygiène et des Procédés Alimentaires, Institut National de la Recherche Agronomique, Massy, 91300
关键词
Film pressure; Spreading pressure; Work of adhesion;
D O I
10.1163/156856190X00441
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The basic assumption is made that the film pressure, πe, for the vapours of liquids on polar and non-polar solid surfaces is not negligible. A method is given which allows πe to be calculated from contact angle and γLV measurements. It is based on the fact that the work of adhesion, WA, has a maximum value when there is no vapour adsorption. This maximum value is, by definition, WA0. It is demonstrated that the work of adhesion of mercury gives a good estimate of WA0. Since πe = WA0, - WA, πe can be obtained easily for any liquid-solid pair. © VSP 1990.
引用
收藏
页码:475 / 480
页数:6
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