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Titolo:
Measuring interfacial tensions of micrometer-sized droplets: A novel micromechanical technique
Autore:
Moran, K; Yeung, A; 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:
LANGMUIR
fascicolo: 24, volume: 15, anno: 1999,
pagine: 8497 - 8504
SICI:
0743-7463(19991123)15:24<8497:MITOMD>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNDERSTANDING MICROEMULSIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
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., "Measuring interfacial tensions of micrometer-sized droplets: A novel micromechanical technique", LANGMUIR, 15(24), 1999, pp. 8497-8504

Abstract

A microcantilever technique is developed to directly measure interfacial tensions at the surfaces of emulsion drops. This technique involves distorting (stretching) an otherwise spherical droplet using two suction pipets andquantifying the stretching force with a glass cantilever. From the experimental force-drop deformation relation, which is well described by the Young-Laplace equation, the interfacial tension can be determined. This method of "in situ tensiometry" is applied to emulsions composed of simple liquids,and the results are in good agreement with literature values. At present, the microcantilever technique has attained a resolution of +/-1 mN/m. It has also opened the possibility of directly examining transport processes andrheological properties at the surfaces of emulsion drops and other similarly sized microvolumes, such as food colloids or the microcapsules employed in drug delivery.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/10/20 alle ore 17:46:13