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Interactions in equilibrium free films of aqueous dodecylammonium chloride solutions
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1994 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 168, p. 190-197Article in journal (Refereed)
Abstract [en]

The thickness of thin flat foam films formed in a range of aqueous dodecylammonium chloride solutions at pH 5.9 + 0.2 has been determined using a thin film balance. The results are analyzed within the DLVO theory in order to estimate the interfacial potential of the liquid-air interface. As expected, the interfacial potential increases with increasing surfactant concentration. H owever, it was al so found that the in terfacial potentials deduced from the equilibrium film thickness were significantly lower than those obtained by considering the adsorbed amount (obtained by using the Gibbs' adsorption equation) and the pK.-value of dodecylamine at the interface. The interfacial potential at the air-dodecylammonium chloride solution interface was also found to be significantly lower than the corresponding interfacial potential determined using a surface force apparatus for solid hydrophobic surfaces immersed in dodecylammonium chloride solutions. e 1994 A~~ P~, =.

Place, publisher, year, edition, pages
1994. Vol. 168, p. 190-197
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26769OAI: oai:DiVA.org:ri-26769DiVA, id: diva2:1053772
Note
A937Available from: 2016-12-08 Created: 2016-12-08 Last updated: 2017-11-29Bibliographically approved

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