Micellization of monomeric and poly-ω-methacryloyloxyundecyltrimethylammonium surfactants

Micellization of monomeric and poly-ω-methacryloyloxyundecyltrimethylammonium surfactants

© 2011 American Chemical Society

Bibliographische Detailangaben
Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 27(2011), 19 vom: 04. Okt., Seite 11852-9
1. Verfasser: FitzGerald, Paul A (VerfasserIn)
Weitere Verfasser: Chatjaroenporn, Khwanrat, Zhang, Xiaoli, Warr, Gregory G
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2011
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Electrolytes Micelles Polymethacrylic Acids Quaternary Ammonium Compounds Surface-Active Agents poly-omega-methacryloyloxyundecyltrimethylammonium bromide
Beschreibung
Zusammenfassung:© 2011 American Chemical Society
We have used small-angle neutron scattering to study how micelle morphology of the tail-polymerizable surfactants MUTAB and MUTAC (ω-methacryloyloxyundecyltrimethylammonium bromide and chloride) is affected by classic self-assembly modifiers such as temperature changes, salt addition, and counterion exchange, as a function of their conversion from monomer into polymer amphiphile in aqueous solution. Contrary to common assumptions about polymerized surfactants, these systems remain in dynamic equilibrium under all conditions examined and at all conversions (except for a small amount of high-molecular-weight precipitation by MUTAC). Counterintuitively, the polymerized methacrylate backbone has little influence on aggregate morphology, except for the formation of rod-like mixed micelles of polymerized and unpolymerized surfactant at intermediate conversions. The addition of salt produces a transition to rod-like micelles at all conversions except in the unpolymerized surfactant, which has some characteristics of an asymmetric bolaform surfactant and retains its spheroidal geometry under almost all conditions
Beschreibung:Date Completed 26.01.2012
Date Revised 28.09.2011
published: Print-Electronic
Citation Status MEDLINE
ISSN:1520-5827
DOI:10.1021/la2028059