Polymerization of anionic wormlike micelles

Zhiyuan Zhu, Yamaira I. González, Hangxun Xu, Eric W. Kaler, Shiyong Liu

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Polymerizable anionic wormlike micelles are obtained upon mixing the hydrotropic salt p-toluidine hydrochloride (PTHC) with the reactive anionic surfactant sodium 4-(8-methacryloyloxyoctyl)oxybenzene sulfonate (MOBS). Polymerization captures the cross-sectional radius of the micelles (∼2 nm), induces micellar growth, and leads to the formation of a stable single-phase dispersion of wormlike micellar polymers. The unpolymerized and polymerized micelles were characterized using static and dynamic laser light scattering, small-angle neutron scattering, 1H NMR, and stopped-flow light scattering. Stopped-flow light scattering was also used to measure the average lifetime of the unpolymerized wormlike micelles. A comparison of the average lifetime of unpolymerized wormlike micelles with the surfactant monomer propagation rate was used to elucidate the mechanism of polymerization. There is a significant correlation between the ratio of the average lifetime to the monomer propagation rate and the average aggregation number of the polymerized wormlike micelles.

Original languageEnglish (US)
Pages (from-to)949-955
Number of pages7
JournalLangmuir
Volume22
Issue number3
DOIs
StatePublished - Jan 31 2006

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