期刊
SOFT MATTER
卷 9, 期 6, 页码 1997-2002出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2sm27423j
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类别
资金
- SLAB/Bright Sparks scholarship
- University of Malaya [UM.C/HIR/MOHE/SC/07]
We report on the unprecedented ultrasound-driven engineering of typical wormlike micelles to well-aligned, much higher viscoelastic threadlike micelles and lower viscoelastic tubular micelles that have potential practical applications in medicine and oilfield industries. The sonication of the CTAB/salicylate micelle system at 211 kHz in aqueous solutions generated two nanostructures with specific but contradicting properties: stably aligned threadlike micelles of similar to 2 nm in diameter and several mu m in length with a high viscoelasticity and low viscoelastic tubular micelles of similar to 30 nm in diameter and a few hundred nanometres in length. The tubular micelles are relatively unstable structures formed by the coalescence of vesicular intermediates generated during sonication. Acoustic cavitation-generated physical effects are primarily responsible for the generation of these novel nanostructures. This study also provides the first ever experimental evidence in support of a well-known theoretical model that was proposed in the 1990s on the structural transformation of micelles.
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