Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Stimuli-responsive polyelectrolyte surfactant complexes for the reversible control of solution viscosity


Del Sorbo,  Giuseppe Rosario
Max Planck Institute of Colloids and Interfaces, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Del Sorbo, G. R., Clemens, D., Schneck, E., & Hoffmann, I. (2022). Stimuli-responsive polyelectrolyte surfactant complexes for the reversible control of solution viscosity. Soft Matter, 18(12), 2434-2440. doi:10.1039/D1SM01774H.

Cite as: https://hdl.handle.net/21.11116/0000-000A-2BD8-3
Interactions of polyelectrolytes with oppositely charged surfactants can give rise to a large variety of self-assembled structures. Some of these systems cause a drastic increase in solution viscosity, which is related to the surfactant forming aggregates interconnecting several polyelectrolyte chains. For these aggregates to form, the surfactant needs to be sufficiently hydrophobic. Here, we present a system consisting of the anionic surfactant sodium monododecyl phosphate and the cationic cellulose-based polyelectrolyte JR 400. The hydrophobicity of the surfactant can be controlled by the solution's pH. At pH > 12, the surfactant headgroup bears two charges. As a consequence, the solution viscosity decreases drastically by up to two orders of magnitude, while it can be as high as 10 Pa s at lower pH. In this paper, we investigate the changes of the mesoscopic structure of the system which lead to such drastic changes in viscosity using small angle neutron scattering and neutron spin-echo spectroscopy. Such systems are potentially interesting as they allow for a modular design where stimuli responsiveness is introduced by relatively small amounts of surfactant reusing the same simple polyelectrolyte.