Dynamic interfacial properties of drops relevant to W/O-emulsion-forming systems: A refined measurement apparatus
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- 作者：L. Del Gaudio ; P. P ; olfini ; F. Ravera ; J. Krä ; gel ; E. Santini ; A.V. Makievski ; B.A. Noskov ; L. Liggieri ; R. Miller ; G. Loglio
- 关键词：Pendant drop profile-analysis tensiometry ; Capillary-pressure tensiometry ; Dynamic interfacial tension ; Interfacial dilational rheology ; Liquid– ; liquid systems
- 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
- 出版年：2008
- 出版时间：20 June 2008
- 年：2008
- 卷：323
- 期：1-3
- 页码：3-11
- 全文大小：815 K
文摘
Detailed construction is presented for a refined instrument designed for the accurate measurement of dynamic interfacial tension, both in the frequency domain and in the time domain, in liquid/gas and in liquid/liquid systems. The instrument is an integrated combination of a profile-analysis tensiometer with a capillary-pressure tensiometer. The measurement process is firmly established on the independent acquisition in synchronism of two sets of observable physical properties (namely, the drop-profile coordinates and the differential pressure). The favourable comparison of the determined interfacial tension from the two data sets, in an overlapping range of experiment parameters, grants reliability of the measurement values.