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The effect of evaporation on Wilhelmy-type measurements of wetting tension: Is wetting equilibrium reached for cationic surfactant adsorption on mica?
YKI – Ytkemiska institutet. KTH Royal Institute of Technology, Sweden.
1997 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 191, 264-267 p.Article in journal (Refereed)
Abstract [en]

The effect of lowering of the liquid level by evaporation on the measured values of the advancing wetting tension is calculated, and is shown to be able to account for most of the change with time of the advancing wetting tension in an earlier paper (L. G. T. Eriksson et al., J. Colloid Interface Sci. 181, 476 (1996)) concerned with the adsorption of hexadecyltrimethylammonium bromide (CTAB) on mica, using rates of evaporation (≈ 0.07 mm/h) measured for that setup. With stricter evaporation control, the wetting tension hysteresis is still large after 15 h equilibration, and it is not possible, on that time scale, to record the approach to equilibrium of the advancing contact angle for the system CTAB/mica.

Place, publisher, year, edition, pages
1997. Vol. 191, 264-267 p.
Keyword [en]
Equilibrium contact angle, evaporation, hexadecyltrimethylammonium bromide (CTAB), mica, surfactant adsorption, Wilhelmy plate method
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26735OAI: oai:DiVA.org:ri-26735DiVA: diva2:1053738
Note
A1097Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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