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Diffusion of polymers in concentrated solutions for applications to phase separation

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HAL Id: cea-02329051

https://hal-cea.archives-ouvertes.fr/cea-02329051

Submitted on 23 Oct 2019

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Diffusion of polymers in concentrated solutions for

applications to phase separation

H. Manzanarez, J. Méricq, Patrick Guenoun, J. Chikina, D. Bouyer

To cite this version:

H. Manzanarez, J. Méricq, Patrick Guenoun, J. Chikina, D. Bouyer. Diffusion of polymers in con-centrated solutions for applications to phase separation. GdR SLAMM, May 2019, Reims, France. �cea-02329051�

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Diffusion of polymers in concentrated solutions for applications to phase separation H. Manzanarez a, J.P. Mericq a, Patrick Guenoun b, J. Chikina b, D. Bouyer a

a IEM (Institut Européen des Membranes) UMR 5635 (CNRS-ENSCM-UM2), Université Montpellier, Place Eugène Bataillon, F-34095 Montpellier, France

b Laboratoire Interdisciplinaire sur l’Organisation Nanométrique et Supramoléculaire (LIONS), NIMBE, CEA, CNRS, Université Paris-Saclay, CEA-Saclay 91191 Gif-sur-Yvette Cedex, France

For modeling phase separation (PS) of concentrated polymer solutions, such as for describing the fabrication of membranes by introduction of a non-solvent or by inducing a temperature change, one needs an adequate description of polymer mobility, or equivalently collective diffusion. However several theoretical models were proposed in literature in the last 40 years without always reaching a clear consensus. Here we report on a test of such different models in the framework of 2D phase-field calculations of PS without hydrodynamics for polymer solutions. It is concluded that the dependence of mobility with concentration is crucial but that the choice of the model is not so critical as far as PS is concerned. This situation could change when hydrodynamics is taken into account.

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