3 Citations (SciVal)

Abstract

Molecularly rigid polymers with internal charges (positive charges induced by amine methylation) allow electroosmotic water flow to be tuned by adjusting the charge density (the degree of methylation). Here, a microporous polyamine (PIM-EA-TB) is methylated to give a molecularly rigid anion conductor. The electroosmotic drag coefficient (the number of water molecules transported per anion) is shown to increase with a lower degree of methylation. Net water transport (without charge flow) in a coupled anionic diode circuit is demonstrated based on combining low and high electroosmotic drag coefficient materials. The AC-electricity driven net process offers water transport (or transport of other neutral species e.g. drugs) with net zero ion transport and without driver electrode side reactions.
Original languageEnglish
Pages (from-to)42369-42377
JournalACS Applied Materials and Interfaces
Volume15
Issue number36
Early online date28 Aug 2023
DOIs
Publication statusPublished - 13 Sept 2023

Bibliographical note

Funding Information:
F.M. thanks for the initial financial support by the EPSRC (EP/K004956/1).

Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society

Keywords

  • coupled diodes
  • electroosmosis
  • ionomer membranes
  • rectification
  • voltammetry

ASJC Scopus subject areas

  • General Materials Science

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