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Self-driven membrane filtration by core–shell polymer composites

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Abstract

Membrane filtration is an effective way of separation that usually requires an external driving force. Novel configurations simplifying the filtration process could offer extra versatility and enable separation in a broader context at different scales. This work presents a self-driven 3D filtration strategy based on core–shell polymer composites (CSPCs). The core is a hydrogel sphere that can spontaneously absorb ∼50 times its own weight of water, while a polyamide film, as thin as ∼7 nm, formed through interfacial polymerization serves as the separating shell. These flexible and easy-to-use CSPCs exhibit high-capacity and selective water absorption, which presents unique possibilities for applications such as concentrating biomedical and environmental samples for analyses and recovering valuable resources from waste streams.

Graphical abstract: Self-driven membrane filtration by core–shell polymer composites

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Article information


Submitted
01 Apr 2020
Accepted
27 May 2020
First published
01 Jun 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Self-driven membrane filtration by core–shell polymer composites

Z. Dou, T. Wang, W. Chen, B. Lin, H. Dong, W. Sun and X. Xie, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/D0TA03617J

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