Issue 12, 2010
From the journal:

Soft Matter

Transition from “brittle” to “ductile” rheological behavior by tuning the morphology of self-assembled networks

T. Tixier,a   H. Tabuteau,a   A. Carrière,a   L. Ramos*a  and  C. Ligoure*a  

* Corresponding authors

a Laboratoire des Colloïdes, Verres et Nanomatériaux (UMR CNRS-UM2 5587) CC26, Université Montpellier 2, Montpellier Cedex 5, France
E-mail: laurence.ramos@univ-montp2.fr, christian.ligoure@univ-montp2.fr

Abstract

We report on a new class of self-assembled transient networks made of surfactant micelles of tunable morphology (from spheres, to rodlike to wormlike) reversibly linked by telechelic polymers. Linear rheological measurements show that three distinct domains can be defined depending on the morphologies of the micelles: a domain where the micelles are isolated and not entangled, an intermediate domain where the micelles are partially entangled and a domain where the micelles are fully entangled. Flow curves of the transient networks of tunable morphology suggest that one can associate to the three domains distinct failures modes: a brittle mode, an intermediate mode and finally a ductile/shear banding mode, as the micelles grow. Thanks to this unique class of self-assembled networks, a continuous failure mode transition from brittle to ductile has been evidenced.

Graphical abstract: Transition from “brittle” to “ductile” rheological behavior by tuning the morphology of self-assembled networks

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Article information

DOI
https://doi.org/10.1039/C001807D
Article type
Paper
Submitted
27 Jan 2010
Accepted
23 Mar 2010
First published
07 May 2010

Soft Matter, 2010,6, 2699-2707

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Transition from “brittle” to “ductile” rheological behavior by tuning the morphology of self-assembled networks

T. Tixier, H. Tabuteau, A. Carrière, L. Ramos and C. Ligoure, Soft Matter, 2010, 6, 2699 DOI: 10.1039/C001807D

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