%0 Journal Article
%T Modeling phase inversion using Cahn-Hilliard equations - Influence of the mobility on the pattern formation dynamics
%+ Institut Européen des membranes (IEM)
%+ Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire (LIONS)
%A Manzanarez, H.
%A Mericq, J.P.
%A Guenoun, P.
%A Chikina, J.
%A Bouyer, D, P
%< avec comité de lecture
%@ 0009-2509
%J Chemical Engineering Science
%I Elsevier
%V 173
%P 411 - 427
%8 2017-08-09
%D 2017
%R 10.1016/j.ces.2017.08.009
%K Phase-field simulation
%K Cahn-Hilliard model
%K Mobility
%K Membranes
%Z Chemical Sciences/Material chemistryJournal articles
%X This paper presents a phase-field simulation of phase separation for a polymer/solvent system and aims at investigating in a systematic way the influence of the mobility model on the simulation results. In 2D geometry, the Flory-Huggins theory was used to describe the thermodynamics of the PMMA/cyclohexanol system and four mobility models were tested: a constant model, a slow model, a fast model and a mobility model based on the free-volume theory of Vrentas. The simulated patterns were analyzed by Fourier transform and using Minkowski descriptors. Growth laws deduced from a Fourier Transform of the patterns exhibited that the power laws were ranged between 1/5 and 1/3 depending on the quenching conditions ( and initial composition) and the mobility model. Using the Vrentas mobility model, growth laws of , and were found for initial compositions in the range , and , respectively, whereas due to faster phase inversion dynamics, a growth law close to was simulated for the constant mobility model whatever the quenching conditions ( and initial composition), thus demonstrating the importance to choose an appropriate mobility model for simulating the phase separation of polymer/solvent system.
%G English
%L cea-01591206
%U https://cea.hal.science/cea-01591206
%~ CEA
%~ CNRS
%~ ENSC-MONTPELLIER
%~ IEM
%~ PUBNIMBE
%~ INC-CNRS
%~ IRAMIS-NIMBE
%~ CEA-UPSAY
%~ UNIV-PARIS-SACLAY
%~ CEA-UPSAY-SACLAY
%~ CHIMIE
%~ UNIV-MONTPELLIER
%~ TEST-HALCNRS
%~ ANR
%~ GS-ENGINEERING
%~ IRAMIS
%~ GS-CHIMIE
%~ GS-PHYSIQUE
%~ INSTITUT-SCIENCES-LUMIERE
%~ UM-2015-2021