Issue 30, 2012
From the journal:

Soft Matter

Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

Jun Li,a   Mingwei Zhao,b   Hongtao Zhou,ab   Hejun Gaoac  and  Liqiang Zheng*a  

* Corresponding authors

a Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, Shandong, P. R. China
E-mail: lqzheng@sdu.edu.cn
Fax: +86-531-88564750
Tel: +86-531-88366062

b School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, P. R. China

c Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong, China

Abstract

A photo-responsive system composed of an imidazolium-type surfactant 1-hexadecyl-3-methylimidazolium bromide ([C16mim]Br) and a commonly photosensitive aromatic compound trans-cinnamic acid (trans-CA) was studied through UV spectra, 1H NMR, and rheological measurements. In aqueous solution, the compounds [C16mim]Br and trans-CA can self-assemble to form viscoelastic wormlike micelles. Through UV irradiation, the CA molecules exhibit molecular photoisomerization from trans- to cis-, which results in a change of the molecular critical packing. The wormlike micelles transform into spherical micelles after UV irradiation, which is also confirmed by rheological measurements.

Graphical abstract: Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

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Article information

DOI
https://doi.org/10.1039/C2SM25218J
Article type
Paper
Submitted
30 Jan 2012
Accepted
28 May 2012
First published
28 Jun 2012

Soft Matter, 2012,8, 7858-7864

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Photo-induced transformation of wormlike micelles to spherical micelles in aqueous solution

J. Li, M. Zhao, H. Zhou, H. Gao and L. Zheng, Soft Matter, 2012, 8, 7858 DOI: 10.1039/C2SM25218J

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