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Double dynamic hydrogels formed by wormlike surfactant micelles and cross-linked polymer

Article dans une revue avec comité de lecture
Author
SHIBAEV, Andrey V.
302918 Lomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] [MSU]
KUKLIN, Alexander I.
43709 Frank Laboratory of Neutron Physics [Dubna] [FLNP]
122906 Moscow Institute of Physics and Technology [Moscow] [MIPT]
TOROCHESHNIKOV, Vladimir N.
101968 Department of Chemistry, Lomonosov Moscow State University
OREKHOV, Anton S.
30852 A. V. Shubnikov Institute of Crystallography [IC RAS]
122906 Moscow Institute of Physics and Technology [Moscow] [MIPT]
MIQUELARD-GARNIER, Guillaume
MATSARSKAIA, Olga
2569 Institut Laue-Langevin [ILL]
ILIOPOULOS, Ilias
PHILIPPOVA, Olga E.
302918 Lomonosov Moscow State University = Université d'État Lomonossov de Moscou [Moscou] [MSU]
ccROLAND, Sébastien
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/22236
DOI
10.1016/j.jcis.2021.11.198
Date
2022-04
Journal
Journal of Colloid and Interface Science

Abstract

Hypothesis: Interpenetrating networks consisting of a polymer network with dynamic cross-links and a supramolecular network allow obtaining hydrogels with significantly enhanced mechanical properties. Experiments: Binary hydrogels composed of a dynamically cross-linked poly(vinyl alcohol) (PVA) network and a transient network of entangled highly charged mixed wormlike micelles (WLMs) of surfactants (potassium oleate and n-octyltrimethylammonium bromide) were prepared and studied by rheometry, SANS, USANS, cryo-TEM, and NMR spectroscopy. Findings: Binary hydrogels show significantly enhanced rheological properties (a 3400-fold higher viscosity and 27-fold higher plateau modulus) as compared to their components taken separately. This is due to the microphase separation leading to local concentrating of PVA and WLMs providing larger number of polymer–polymer contacts for cross-linking and longer WLMs with more entanglements. Such materials are very promising for the application in many areas, ranging from enhanced oil recovery to biomedical uses.

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