Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Micron-scale tensiometry for studying density-matched and highly viscous fluids - with application to bitumen-in-water emulsions
Autore:
Moran, K; Yeung, A; Czarnecki, J; Masliyah, J;
Indirizzi:
Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada Univ Alberta Edmonton AB Canada T6G 2G6 ngn, Edmonton, AB T6G 2G6, Canada Syncrude Canada Ltd, Edmonton Res Ctr, Edmonton, AB T6N 1H4, Canada Syncrude Canada Ltd Edmonton AB Canada T6N 1H4 monton, AB T6N 1H4, Canada
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
fascicolo: 1-2, volume: 174, anno: 2000,
pagine: 147 - 157
SICI:
0927-7757(20001115)174:1-2<147:MTFSDA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTERFACIAL-TENSION; OIL SANDS; RELEASE; SURFACE;
Keywords:
interfacial tension; micromechanics; bitumen; density-matched fluids;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Masliyah, J Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada Univ Alberta Edmonton AB Canada T6G 2G6 n, AB T6G 2G6, Canada
Citazione:
K. Moran et al., "Micron-scale tensiometry for studying density-matched and highly viscous fluids - with application to bitumen-in-water emulsions", COLL SURF A, 174(1-2), 2000, pp. 147-157

Abstract

Measuring the interfacial tension (IFT) between density-matched fluids hasbeen a serious challenge in the study of tensiometry. These measurements can be further complicated when one or both of the fluids possess high viscosities. In this study, a micron-scale technique is developed to circumvent such difficulties. This microscopic technique involves stretching an otherwise spherical drop, of diameter similar to 10 mu m in an aqueous medium, with the use of two suction micropipettes; one of the pipettes is shaped as acantilever to allow for measurement of the stretching force. It is shown that, for mechanical experiments conducted on the 1-10 mu m scale, as in thepresent application, the gravitational body force and viscous effects can be neglected (provided relaxation times of several seconds are allowed). The Young-Laplace equation, which describes the force-drop deformation relation, is utilized to determine the equilibrium IFT. The system of present interest was that of bitumen drops in water at room temperature, in which the densities of the two phases are nearly equal (to within 1%) and the viscosity of bitumen is extremely high (more than 10(5) times that of water). Thisis the first study of bitumen-water (IFT) at room temperature over a rangeof pH. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/10/20 alle ore 11:03:34