Water-in-oil microemulsion formation with aqueous C n-TAB solution and H-AOT/isooctane solution

Jun Oshitani, Yuichi Baba, Shiho Takashina, Mikio Yoshida, Naoyuki Ishida

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Abstract

Aqueous C n-TAB (n = 8, 10, and 12; octyl-, decyl-, and dodecyltrimethylammonium bromide) solution and isooctane solution of H-AOT (hydrogen bis(2-ethylhexyl) sulfosuccinate) were mixed using a vortex mixer to produce a water-in-oil (W/O) microemulsion. The microemulsion was formed with the critical amount of C n-TAB; the order of the critical amount was C 12-TAB < C 10-TAB < C 8-TAB. A possible cause for the microemulsion formation was proposed based on the screening of the electrostatic repulsion between negatively charged AOT's polar headgroups by the positively charged C n-TAB's polar headgroups, the hydrophobic interaction between hydrocarbon chains, and hydrated water around AOT's polar headgroup.

Original languageEnglish
Pages (from-to)1072-1074
Number of pages3
JournalChemistry Letters
Volume41
Issue number10
DOIs
Publication statusPublished - Sep 21 2012

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ASJC Scopus subject areas

  • Chemistry(all)

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