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Alkyl glucosides on hydrophobic surfaces studied by surface force and wetting measurements
YKI – Ytkemiska institutet.
1996 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 183, 506-514 p.Article in journal (Refereed)
Abstract [en]

The wetting properties of hydrophobized surfaces in the presence of alkyl glucosides have been studied using a Wilhelmy balance technique, and the interparticle forces acting between such surfaces have been investigated using the interferometric surface force apparatus. The adsorption at concentrations well below the cmc is rather limited both for the anomerically pure octyl b-glucoside and for the technical product based on the branched octyl glucoside, 2-ethylhexyl glucoside. However, the adsorption results in a decreasing surface hydrophobicity, and consequently the force needed to separate two such surfaces from each other is reduced. At the cmc for octyl b-glucoside, a surfactant monolayer is adsorbed on each surface. The interaction between the glucose units gives rise to a short-range repulsive force. Beyond the range of this repulsive force a weak attraction is experienced. Addition of a small amount of octyl a-glucoside does not change the short-range interaction significantly. The technical 2-ethylhexyl glucoside surfactant behaves similarly to the anomerically pure surfactant at low concentrations. The solution with the technical glucoside phase-separates at high surfactant concentration. It is observed that under such conditions a thick layer is deposited on each surface.

Place, publisher, year, edition, pages
1996. Vol. 183, 506-514 p.
Keyword [en]
Alkyl glucosides, adsorption, surface forces, wetting behaviour
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26752OAI: oai:DiVA.org:ri-26752DiVA: diva2:1053755
Note
A1048Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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