Self-Assembled Asymmetric Block Copolymer Membranes: Bridging the Gap from Ultra- to Nanofiltration

Haizhou Yu, Xiaoyan Qiu, Nicolas Moreno, Zengwei Ma, Victor Manuel Calo, Suzana P. Nunes, Klaus Viktor Peinemann*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

The self-assembly of block copolymers is an emerging strategy to produce isoporous ultrafiltration membranes. However, thus far, it has not been possible to bridge the gap from ultra- to nanofiltration and decrease the pore size of self-assembled block copolymer membranes to below 5 nm without post-treatment. It is now reported that the self-assembly of blends of two chemically interacting copolymers can lead to highly porous membranes with pore diameters as small as 1.5 nm. The membrane containing an ultraporous, 60 nm thin separation layer can fully reject solutes with molecular weights of 600 g mol-1 in aqueous solutions with a water flux that is more than one order of magnitude higher than the permeance of commercial nanofiltration membranes. Simulations of the membrane formation process by dissipative particle dynamics (DPD) were used to explain the dramatic observed pore size reduction combined with an increase in water flux.

Original languageEnglish (US)
Pages (from-to)13937-13941
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number47
DOIs
StatePublished - Nov 16 2015

Bibliographical note

Publisher Copyright:
© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

  • block copolymers
  • membranes
  • nanofiltration
  • self-assembly

ASJC Scopus subject areas

  • General Chemistry
  • Catalysis

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