Dynamics and scission of rodlike cationic surfactant micelles in shear flow

Abhinanden Sambasivam, Ashish V. Sangwai, Radhakrishna Sureshkumar

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Flow-induced configuration dynamics and scission of rodlike micelles are studied for the first time using molecular dynamics simulations in the presence of an explicit solvent and salt. Predicted dependence of tumbling frequency and orientation distribution on shear rate S agrees with mesoscopic theories. However, micelle stretching increases the distance between the cationic head groups and adsorbed counterions, which reduces electrostatic screening and increases the overall energy Φ linearly with micelle length. Micelle scission occurs when Φ exceeds a threshold value, independent of S.

Original languageEnglish (US)
Article number158302
JournalPhysical Review Letters
Volume114
Issue number15
DOIs
StatePublished - Apr 17 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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