Temperature-Modulated Water Filtration Using Microgel-Functionalized Hollow-Fiber Membranes

In the present work, we investigate the potential of aqueous polymer microgels in membrane technology, especially for filtration applications. The poly(N‐vinylcaprolactam)‐based microgels exhibit thermoresponsive behavior and were employed to coat hollow‐fiber membranes used for micro‐ and ultrafilt...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2014-05, Vol.53 (22), p.5706-5710
Main Authors: Menne, Daniel, Pitsch, Fee, Wong, John E., Pich, Andrij, Wessling, Matthias
Format: Article
Language:English
Subjects:
Cleaning
Constants
dynamic adsorption
Filtration
Flux
hollow-fiber membranes
Membranes
Microgels
Permeability
Stability
thermoresponsive microgels
Ultrafiltration
ultrafiltration membranes
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Summary:In the present work, we investigate the potential of aqueous polymer microgels in membrane technology, especially for filtration applications. The poly(N‐vinylcaprolactam)‐based microgels exhibit thermoresponsive behavior and were employed to coat hollow‐fiber membranes used for micro‐ and ultrafiltration. We discuss the preparation of microgel‐modified membranes (by “inside‐out” as well as “outside‐in” filtration in dead‐end mode). The clean‐water permeability and stability of these membranes was studied not only as a function of time, but also of temperature. The microgel‐modified membranes exhibit a reversible thermoresponsive behavior whereby both the resistance and the retention increased with decreasing temperature. Hollow‐fiber membranes can be modified in a straightforward fashion with thermoresponsive microgels when the microgels are infiltrated into the porous structure of the membrane in dead‐end mode at constant flux. The resulting membranes show thermoresponsive properties in terms of resistance and retention.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201400316