ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
A dynamic interfacial tensiometer described measures the tension of stressed liquid-liquid interfaces. In this accurate and controlled method, the time-dependent pressure difference across the curved interface of a spherical drop, immersed in a second immiscible phase, is measured as a function of time. Dynamic experiments are conducted by varying the drop size, therby stressing the interface. The technique is eminently suited for the measurement of static and dynamic interfacial tensions, the study of the diffusion, adsorption, and desorption kinetics of surfactants, and the rheological behavior of liquid films. These capabilities are demonstrated for n-dodecane contacted with an aqueous solution of a nonionic surfactant. To explain the phenomena, diffusion models are developed that compare well with the experimental data. The noninvasiveness and versatility make this instrument a useful tool.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690410418
