Crystal nuclei templated nanostructured membranes prepared by solvent crystallization and polymer migration

Bo Wang, Jing Ji and Kang Li ()
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Bo Wang: Imperial College London
Jing Ji: Imperial College London
Kang Li: Imperial College London

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Currently, production of porous polymeric membranes for filtration is predominated by the phase-separation process. However, this method has reached its technological limit, and there have been no significant breakthrough over the last decade. Here we show, using polyvinylidene fluoride as a sample polymer, a new concept of membrane manufacturing by combining oriented green solvent crystallization and polymer migration is able to obtain high performance membranes with pure water permeation flux substantially higher than those with similar pore size prepared by conventional phase-separation processes. The new manufacturing procedure is governed by fewer operating parameters and is, thus, easier to control with reproducible results. Apart from the high water permeation flux, the prepared membranes also show excellent stable flux after fouling and superior mechanical properties of high pressure load and better abrasion resistance. These findings demonstrate the promise of a new concept for green manufacturing nanostructured polymeric membranes with high performances.

Date: 2016
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DOI: 10.1038/ncomms12804

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