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Surface forces between water-plasma-modified mica surfaces in solutions of non-ionic surfactant
YKI – Ytkemiska institutet.
1994 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 83, 121-128 p.Article in journal (Refereed)
Abstract [en]

The results of surface force measurements between water-plasma-modified mica surfaces in solution as a function of non-ionic surfactant (pentaoxyethylene dodecyl ether) concentration are presented. In the absence of surfactant the forces are purely repulsive and characteristic of silica in that there is an electrostatic repulsion and a repulsive deviation from DLVO theory at short separations. Only a slight decrease in the range of the extra repulsion was observed when the surfactant concentration was brought to one-third of the CMC. There was no significant effect on the surface force until the concentration was slightly higher than the CMC at which point a small amount of material became trapped between the surfaces and a small adhesion was observed. After a long equilibration period a long-range, hysteretic but reproducible force was observed. It is speculated that this force might be due to a local surface-induced phase transition. The forces measured in this system are compared with those measured between real silica surfaces.

Place, publisher, year, edition, pages
1994. Vol. 83, 121-128 p.
Keyword [en]
Adsorption, non-ionic surfactant, plasma modification, surface forces
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26473OAI: oai:DiVA.org:ri-26473DiVA: diva2:1053475
Note
A909Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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