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Segregation versus interdigitation in highly dynamic polymer/surfactant layers

Segregation versus interdigitation in highly dynamic polymer/surfactant layers

Mansour, Omar T. ORCID: 0000-0001-6475-7297, Cattoz, Beatrice, Beaube, Manon, Heenan, Richard K., Schweins, Ralf, Hurcom, Jamie and Griffiths, Peter C. ORCID: 0000-0002-6686-1271 (2019) Segregation versus interdigitation in highly dynamic polymer/surfactant layers. Polymers, 11 (1):109. ISSN 2073-4360 (Online) (doi:https://doi.org/10.3390/polym11010109)

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Abstract

Many polymer/surfactant formulations involve a trapped kinetic state that provides some beneficial character to the formulation. However, the vast majority of studies on formulations focus on equilibrium states. Here, nanoscale structures present at dynamic interfaces in the form of air-in-water foams are explored, stabilised by mixtures of commonly used non-ionic, surface active block copolymers (Pluronic®) and small molecule ionic surfactants (sodium dodecylsulfate, SDS, and dodecyltrimethylammonium bromide, C12TAB). Transient foams formed from binary mixtures of these surfactants shows considerable changes in stability which correlate with the strength of the solution interaction which delineate the interfacial structures. Weak solution interactions reflective of distinct coexisting micellar structures in solution lead to segregated layers at the foam interface, whereas strong solution interactions lead to mixed structures both in bulk solution, forming interdigitated layers at the interface.

Item Type: Article
Additional Information: © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords: SANS, foams, interfacial structures
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Pharmaceutical, Chemical & Environmental Sciences
Last Modified: 16 May 2019 15:41
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: GREAT 3
URI: http://gala.gre.ac.uk/id/eprint/22738

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