On the mechanism of shear-thinning in viscous oppositely charged 
polyelectrolyte surfactant complexes (PESCs)

Del Sorbo, Giuseppe Rosario; Prévost, Sylvain François; Schneck, Emanuel; Gradzielski, Michael; Hoffmann, Ingo

doi:10.1021/acs.jpcb.9b10467

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On the mechanism of shear-thinning in viscous oppositely charged polyelectrolyte surfactant complexes (PESCs)

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Schneck, Emanuel
Emanuel Schneck, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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引用

Del Sorbo, G. R., Prévost, S. F., Schneck, E., Gradzielski, M., & Hoffmann, I. (2020). On the mechanism of shear-thinning in viscous oppositely charged polyelectrolyte surfactant complexes (PESCs). The Journal of Physical Chemistry B, 124(5), 909-913. doi:10.1021/acs.jpcb.9b10467.

引用: https://hdl.handle.net/21.11116/0000-0005-9AAD-B

要旨

Semidilute mixtures of the cationically modified cellulose-based polyelectrolyte JR~400 and the anionic surfactant Sodium Dodecyl Sulfate (SDS) form highly viscous solutions if a slight excess of charges from the polyelectrolyte is present. The reason for this is the formation of mixed rodlike aggregates in which the surfactant cross-links several polyelectrolyte chains. The same solutions also show shear thinning behaviour. In this paper we use rheoSANS to investigate the structural evolution of the rodlike aggregates under steady shear and thereby elucidate the mechanism of shear thinning in these viscous oppositely charged polyelectrolyte surfactant complexes.