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ZB 10 - Soft Condensed Matter (R. Holyst)

We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!

Publication

Phase Transition in Salt-Free Catanionic Surfactant Mixtures Induced by Temperature

Author(s): Li, Hongguang and Wieczorek, Stefan A. and Xin, Xia and Kalwarczyk, and Ziebacz, Natalia and Szymborski, Tomasz and Holyst, Robert and Hao, Jingcheng and Gorecka, Ewa and Pociecha, Damian
Title: Phase Transition in Salt-Free Catanionic Surfactant Mixtures Induced by Temperature
Abstract: Aggregate transitions in salt-free catanionic surfactant mixtures of hydroxide (TTAOH)/fatty acid were as a function of surfactant concentration and temperature. acid (LA), myristic acid (MA), and palmitic acid (PA) were chosen the current study. The TTAOH/LA mixture exhibited rich phase at room temperature. With increasing total surfactant (c(T)), a bluish vesicular (L(alpha v)) phase, an micellar (L(1)) phase, and a birefringent lamellar (L(alpha)) were observed. Between the L(alpha v) phase and the L(1) phase, a L(alpha)'/L(1) two-phase region was determined. With increasing a transition from the L(alpha) phase to the L(1) phase was at higher c(T) whereas at lower c(T) an opposite transition from L(1) phase to the L(alpha v) phase was noticed. Thus surprisingly, observed bilayer-to-micelle and micelle-to-bilayer transitions in the catanionic surfactant system, both induced by the temperature Replacing LA by MA and PA caused a continuous increase in the Krafft point of the mixture. The L(alpha v)-phase region and region become larger. Moreover, a single L(1)-phase region was absent within the investigated temperature range.
Pages: 34-40
Journal: LANGMUIR
Volume: 26
ID: ISI:000272937500006
Year: 2010
DOI: 10.1021/la902069w