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Aggregation in tetraalkylammonium dodecanoate systems
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1991 (English)In: Colloids and Surfaces, ISSN 0166-6622, E-ISSN 1873-4340, Vol. 59, 387-397 p.Article in journal (Refereed)
Abstract [en]

Aggregation in some different tetraalkylammonium dodecanoate systems has been studied. The influence of counterions on the phase behaviour of both binary surfactant/water systems and more complicated, multi-component systems were investigated, by applying NMR self-diffusion and Langmuir Blodgett techniques. Increasing the size of the tetra_x001F__x001F_alkylammonium counterions was found to lead to a substantial reduction of the critical micelle concentration. This is due to increased ion-micelle interactions associated with the enhanced hydrophobicity of the larger counterions. Furthermore, the increase in the ion size was found to be correlated with a depression of the tendency of the surfactant to form aggregates with low surface curvature, such as liquid-crystalline phases and rod-like micelles. The importance of the counterion size with regard to the formation of microemulsions in surfactant/water/oil systems was also demonstrated.

Place, publisher, year, edition, pages
1991. Vol. 59, 387-397 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26402OAI: oai:DiVA.org:ri-26402DiVA: diva2:1053404
Note
A707Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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