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© 2021 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 (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Dual transient networks were prepared by mixing highly charged long wormlike micelles of surfactants with polysaccharide chains of hydroxypropyl guar above the entanglement concentration for each of the components. The wormlike micelles were composed of two oppositely charged surfactants potassium oleate and n-octyltrimethylammonium bromide with a large excess of anionic surfactant. The system is macroscopically homogeneous over a wide range of polymer and surfactant concentrations, which is attributed to a stabilizing effect of surfactants counterions that try to occupy as much volume as possible in order to gain in translational entropy. At the same time, by small-angle neutron scattering (SANS) combined with ultrasmall-angle neutron scattering (USANS), a microphase separation with the formation of polymer-rich and surfactant-rich domains was detected. Rheological studies in the linear viscoelastic regime revealed a synergistic 180-fold enhancement of viscosity and 65-fold increase of the longest relaxation time in comparison with the individual components. This effect was attributed to the local increase in concentration of both components trying to avoid contact with each other, which makes the micelles longer and increases the number of intermicellar and interpolymer entanglements. The enhanced rheological properties of this novel system based on industrially important polymer hold great potential for applications in personal care products, oil recovery and many other fields.

Details

Title
Dual Transient Networks of Polymer and Micellar Chains: Structure and Viscoelastic Synergy
Author
Roland, Sébastien 1 ; Miquelard-Garnier, Guillaume 1   VIAFID ORCID Logo  ; Shibaev, Andrey V 2   VIAFID ORCID Logo  ; Aleshina, Anna L 2 ; Chennevière, Alexis 3   VIAFID ORCID Logo  ; Matsarskaia, Olga 4 ; Sollogoub, Cyrille 1   VIAFID ORCID Logo  ; Philippova, Olga E 2   VIAFID ORCID Logo  ; Iliopoulos, Ilias 1   VIAFID ORCID Logo 

 Laboratoire PIMM, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM Universite, 75013 Paris, France; [email protected] (S.R.); [email protected] (G.M.-G.); [email protected] (C.S.) 
 Physics Department, Lomonosov Moscow State University, 119991 Moscow, Russia; [email protected] (A.V.S.); [email protected] (A.L.A.) 
 Laboratoire Léon Brillouin, CEA Saclay, 91191 Gif-sur-Yvette, France; [email protected] 
 Institut Laue-Langevin, 38042 Grenoble, France; [email protected] 
First page
4255
Publication year
2021
Publication date
2021
Publisher
MDPI AG
e-ISSN
20734360
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2608135212
Copyright
© 2021 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 (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.