Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Surface tension
Patent
1994-12-13
1996-08-06
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Surface tension
324697, 324691, 324701, 73 6455, G01N 1302, G01R 2722, B01D 1508
Patent
active
055422896
ABSTRACT:
The apparatus and method of the present invention relate to a novel procedure for measuring the interfacial thinning that occurs during a droplet-liquid phase coalescence event. As an example, an aqueous drop is grown at the tip of a capillary submerged into an oil phase which is layered on top of a second aqueous phase. A capillary, which is made of stainless steel, serves as one electrode while a second electrode is immersed into the second aqueous phase beneath the capillary. The oil-aqueous interface is raised to the level of the droplet until the droplet is deformed. This deformation serves as a driving force to produce thinning of the protecting interfacial film who's drainage properties govern the eventual coalescence of the water droplet into the aqueous phase. Because the interfacial film acts as a dielectric between the aqueous droplet and the second aqueous phase, an equivalent parallel plate capacitor is formed between the capillary/electrode and the second electrode immersed in the second aqueous phase. The thinning of the interfacial film is then easily measured by using an A.C. impedance measurement technique applied to the two electrodes. The change in measured capacitance is therefore directly proportional to the thinning of the interfacial film.
REFERENCES:
patent: 4196615 (1980-04-01), Davis
patent: 4260467 (1981-04-01), Smith et al.
patent: 4429273 (1984-01-01), Mazzagatti
patent: 4569226 (1986-02-01), Matteson
patent: 4650588 (1987-03-01), Diebold
patent: 4846955 (1989-07-01), Osteryoung
patent: 4857829 (1989-08-01), Sagae et al.
patent: 5260667 (1993-11-01), Garcia-Golding
patent: 5269176 (1993-12-01), Hool
H. J. Karam, "Description and Application of an Interfacial Viscometer", Journal of Applied Polymer Science, vol. 18, (1974) pp. 1693-1709.
C. H. Sohl, et al., "Novel technique for dynamic surface tension and viscosity measurements at liquid-gas interfaces.sup.a) ", American Institute of Physics, (1978) pp. 1464-1469.
H. C. Maru, et al., "Dilational Viscoelastic Properties of Fluid Interfaces-II", Chemical Engineering Science, vol. 34, (1979) pp. 1295-1307.
Hool Kevin O.
Saunders Robert C.
The Dow Chemical Company
Wiggins David J.
Williams Hezron E.
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