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Citation: LIU Jin-Yan, ZHAO Jian-Xi, CHEN Zhe. Phase Separation in Nonaqueous Mixed Solvents Induced by Quaternary Ammonium Surfactants[J]. Acta Physico-Chimica Sinica, ;2006, 22(07): 845-850. doi: 10.1016/S1872-1508(06)60038-7 shu

Phase Separation in Nonaqueous Mixed Solvents Induced by Quaternary Ammonium Surfactants

1.
Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002 , P. R. China

Received Date: 15 December 2005
Available Online: 27 June 2006

When a quaternary ammonium surfactant has a suitable solubility in a polar solvent, it can induce the phase self-separation of mutually soluble polar and apolar mixed solvents and a stable interface between the two phases can be formed. This phenomenon was attributed to the quaternary ammonium surfactant reaching suitable solubility in the polar solvent and driving out a considerable part of the apolar solvent, in which the surfactant is insoluble. As a result, phase separation appears. Using aqueous surfactant two-phase as reference, we suggest that it be termed as nonaqueous surfactant two-phase (NSTP) and also as two oil phases for short.
- Nonaqueous surfactant two-phase;Quaternary ammonium surfactant;Solubility
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