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Ice-confined synthesis of highly ionized 3D-quasilayered polyamide nanofiltration membranes

  • Yanqiu Zhang
  • , Hao Wang
  • , Jing Guo
  • , Xiquan Cheng
  • , Gang Han
  • , Cher Hon Lau
  • , Haiqing Lin
  • , Shaomin Liu
  • , Jun Ma
  • , Lu Shao*
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Existing polyamide (PA) membrane synthesis protocols are underpinned by controlling diffusion-dominant liquid-phase reactions that yield subpar spatial architectures and ionization behavior. We report an ice-confined interfacial polymerization strategy to enable the effective kinetic control of the interfacial reaction and thermodynamic manipulation of the hexagonal polytype (Ih) ice phase containing monomers to rationally synthesize a three-dimensional quasilayered PA membrane for nanofiltration. Experiments and molecular simulations confirmed the underlying membrane formation mechanism. Our ice-confined PA nanofiltration membrane features high-density ionized structure and exceptional transport channels, realizing superior water permeance and excellent ion selectivity.

Original languageEnglish
Pages (from-to)202-206
Number of pages5
JournalScience
Volume382
Issue number6667
DOIs
StatePublished - 13 Oct 2023
Externally publishedYes

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