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Aggregation in tetr...
Aggregation in tetraalkylammonium dodecanoate systems
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- Jansson, M (författare)
- RISE,YKI – Ytkemiska institutet
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- Jönsson, A (författare)
- RISE,YKI – Ytkemiska institutet
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Li, P (författare)
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visa fler...
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Stilbs, P (författare)
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visa färre...
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(creator_code:org_t)
- 1991
- 1991
- Engelska.
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Ingår i: Colloids and Surfaces. - 0166-6622 .- 1873-4340. ; 59, s. 387-397
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- 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.
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