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Titolo:
Interaction forces between bitumen droplets in water
Autore:
Wu, X; Czarnecki, J; Hamza, N; Masliyah, J;
Indirizzi:
Syncrude Canada Ltd, Edmonton Res Ctr, Edmonton, AB T6N 1H4, Canada Syncrude Canada Ltd Edmonton AB Canada T6N 1H4 monton, AB T6N 1H4, Canada Univ Alberta, Dept Biol Sci, Edmonton, AB T6G 2G2, Canada Univ Alberta Edmonton AB Canada T6G 2G2 Sci, Edmonton, AB T6G 2G2, Canada Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G2, Canada Univ Alberta Edmonton AB Canada T6G 2G2 ngn, Edmonton, AB T6G 2G2, Canada
Titolo Testata:
LANGMUIR
fascicolo: 16, volume: 15, anno: 1999,
pagine: 5244 - 5250
SICI:
0743-7463(19990803)15:16<5244:IFBBDI>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
COLLOIDAL PARTICLE SCATTERING; EMULSIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Wu, X Syncrude Canada Ltd, Edmonton Res Ctr, Edmonton, AB T6N 1H4, Canada Syncrude Canada Ltd Edmonton AB Canada T6N 1H4 , AB T6N 1H4, Canada
Citazione:
X. Wu et al., "Interaction forces between bitumen droplets in water", LANGMUIR, 15(16), 1999, pp. 5244-5250

Abstract

The interaction forces between micron-sized bitumen (heavy crude oil) droplets in an aqueous medium were determined with colloidal particle scattering, a method based on calculating colloidal forces from droplet-droplet collision trajectories. The results indicate that, in addition to an electrostatic force, a heterogeneous protrusion structure on bitumen surface further increases the repulsive force. This structure was found to contain "bumps" of 50-100 nm in horizontal diameter and of 0-20 nm or more in thickness. The protrusion structure helps in stabilizing the emulsion at salt (KCI) concentrations up to 0.1 M. but fails to prevent droplet coalescence at 1 M KCl. This nonuniform structure was not found in the previous study using a surface force apparatus.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 01:13:04