Title :

Self-Oscillating Membranes with Polymer Interface Synchronized with Chemical Oscillator to Reproduce Lifelike Pulsatile Flow

Author(s) :

Benoit, Marianne [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Bouyer, Denis [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Sistat, Philippe [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Ayral, André [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Cot, Didier [Auteur]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Rebiere, Bertrand [Auteur]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Fournier, David [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Lyskawa, Joel [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Antonelli, Claire [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]
Quemener, Damien [Auteur]
Institut Européen des membranes [IEM]
Ecole Nationale Supérieure de Chimie de Montpellier [ENSCM]

Journal title :

Chemistry of Materials

Abbreviated title :

Chem. Mater.

Volume number :

33

Pages :

998-1005

Publisher :

American Chemical Society (ACS)

Publication date :

2020-12-11

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

Self-oscillating filtration membranes having a lifelike pulsatile flow are prepared thanks to a synchronized coupling between a chemical oscillator and a responsive membrane. Commercial alumina membranes are superficially ...
Show more >Self-oscillating filtration membranes having a lifelike pulsatile flow are prepared thanks to a synchronized coupling between a chemical oscillator and a responsive membrane. Commercial alumina membranes are superficially functionalized with pH-responsive poly(methacrylic acid) (PMAA) chains synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization of MAA in the presence of a catechol-based RAFT agent. The grafting of PMAA onto alumina, mediated through catechol chemisorption, is analyzed by X-ray photoelectron spectroscopy, scanning electron microscopy combined with energy-dispersive X-ray spectroscopy, and static water contact angle. Bromate–sulfite–ferrocyanide (BSF) is used as a chemical oscillator, enabling autonomous cyclic pH modulation between 3.5 and 6.5. The pH oscillations are setup in the conditions of membrane filtration inside a filtration cell thanks to a careful study of the bifurcation diagram showing the required conditions to reach the oscillation domain. Since PMAA has a pKa around 5.8, a periodic extension–contraction of the polymer chains is obtained during membrane filtration, which leads to a synchronized change in the membrane pore size. Chemically powered autonomous pulsatile flow with an impressive permeability cycles is observed with an effective chemomechanical feedback action of the membrane pore size change on the chemical oscillator mechanism.Show less >

Language :

Anglais

Audience :

Non spécifiée

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Submission date :

2021-03-10T08:04:48Z
2021-03-12T10:26:34Z
2021-03-12T10:29:14Z
2021-03-12T10:58:13Z
2021-03-12T11:11:59Z