Large and non linear permeability increase in hydrogel membranes

Hydrogels which are hydrophilic and porous materials have recently emerged as promising systems for filtration applications and requires to develop hydrogels with high permeability. To obtain hydrogels with controlled permeability we prepare hydrogel membranes by the photopolymerization of a mixture of poly (ethylene glycol) diacrylate (PEGDA) and large poly(ethylene glycol) (PEG) chains of 300 000 g.mol-1 in the presence of a photoinitiator. We find that this addition of free PEG chains induces a large and non-linear increase of the water permeability. Indeed, by changing the content of PEG chains added, we obtain variations of the hydrogel water permeability over two orders of magnitude. The highest water permeability values are obtained for the membranes when the PEG concentration is equal to its critical overlap concentration C*. Moreover, we find that the flow rate of water through the membranes varies non-linearly with the pressure. We relate this result to the deformability of the membranes as the applied pressure leads to a compression of the pores. This study provides new perspectives for the design of flexible hydrogel membranes with controlled permeability and their application in water treatment and bioseparation.

Large and non linear permeability variations of hydrogels by addition of polymeric additives, M. Alaa Eddine, S. Belbekhouche, S. De Chateauneuf Randon, T. Salez, B. Bresson, C. Monteux, Macromolecules, 2022, 10.1021/acs.macromol.2c01462


Haut de page



À lire aussi...

Microalgae as Soft Permeable Particles

For non-motile microalgae, colloidal surface interactions are the only factor modulating their distribution in space. This is not a totally (...) 

> Lire la suite...

Un doctorant du SIMM, Julien Es Sayed, lauréat du Prix de la Diffusion de la Recherche Jean Langlois

Le 15 juin dernier, le comité de sélection Jean Langlois a décerné le prix de Diffusion de la Recherche à Julien Es Sayed, doctorant du SIMM pour ses (...) 

> Lire la suite...

 

Informations Pratiques

Sciences et Ingénierie de la Matière Molle - UMR 7615

10 rue Vauquelin
75231 PARIS CEDEX 05

  • Directeur : E. Barthel
  • Comité de direction : J.B. d’Espinose, A. Chateauminois, Y. Tran, B. Bresson
  • Pôle gestion : F. Decuq et Odile Neveu
  • Communication : A. Hakopian et M. Ciccotti
  • Systèmes d’information : A. Hakopian
  • Assistant prévention : F. Martin et M. Hanafi

Comment venir ?
Mentions légales