Structural Changes during Polymerization of Acrylamide in Semidilute Solutions of Wormlike Surfactant Micelles
- Authors: Ospennikov A.S.1, Shibaev A.V.1, Kuklin A.I.2,3, Philippova O.E.1
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Affiliations:
- Faculty of Physics, Moscow State University
- Joint Institute for Nuclear Research
- Moscow Institute of Physics and Technology
- Issue: Vol 65, No 5 (2023)
- Pages: 327-332
- Section: РАСТВОРЫ
- URL: https://journals.rcsi.science/2308-1120/article/view/233616
- DOI: https://doi.org/10.31857/S2308112023600060
- EDN: https://elibrary.ru/DBWHGH
- ID: 233616
Cite item
Abstract
The structure and rheological properties of aqueous solutions of the anionic surfactant potassium oleate and the water-soluble monomer acrylamide before and after radical polymerization have been studied. In the absence of monomer and in the presence of a low-molecular-weight salt, potassium oleate forms a network of long entangled cylindrical (wormlike) micelles. The addition of the monomer does not lead to a change in their cylindrical shape and radius, but it promotes the transformation of branched micelles into linear ones. The structure of surfactant aggregates changes significantly after polymerization: according to neutron scattering data, it becomes bicontinuous and its local geometry becomes lamellar. The coexistence of such a structure with polyacrylamide macromolecules in a semidilute solution leads to a significant synergistic increase in viscosity and elastic modulus.
About the authors
A. S. Ospennikov
Faculty of Physics, Moscow State University
Email: shibaev@polly.phys.msu.ru
119991, Moscow, Russia
A. V. Shibaev
Faculty of Physics, Moscow State University
Email: shibaev@polly.phys.msu.ru
119991, Moscow, Russia
A. I. Kuklin
Joint Institute for Nuclear Research; Moscow Institute of Physics and Technology
Email: shibaev@polly.phys.msu.ru
141980, Dubna, Moscow oblast, Russia; 141701, Dolgoprudnyi, Moscow oblast, Russia
O. E. Philippova
Faculty of Physics, Moscow State University
Author for correspondence.
Email: shibaev@polly.phys.msu.ru
119991, Moscow, Russia
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