Polyacrylamide hydrogel membranes with controlled pore sizes

David Valade, Lawrence K. Wong, Yujung Jeon, Zhongfan Jia, Michael J. Monteiro

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We developed a method to characterize polymer-supported polyacrylamide crosslinked hydrogel networks using a range of well-defined poly(N, N-dimethylacrylamide)-coated gold nanoparticles with diameters ranging from 3 to 48 nm under ultrafiltration conditions of 16 bar. The membranes resulted in permeabilities ranging between 0.199 and 6.343 × 10-18 m 2. There was a direct correlation between the size exclusion and the permeability rate coefficient, km; the higher the km value the larger the average pore size. Our results further demonstrate that the gold nanoparticles could be trapped within the membrane at the end of a cul-de-sacs found within the gel network, which often leads to membrane fouling. We believe that this method of using gold nanoparticles to characterize crosslinked membranes provides insight into the gel network, and will provide a unique tool to analyze new membranes.

Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume51
Issue number1
DOIs
Publication statusPublished - 1 Jan 2013
Externally publishedYes

Keywords

  • crosslinking
  • gold nanoparticle
  • hydrogel membrane
  • hydrogels
  • polyacrylamide
  • radical polymerization
  • ultrafiltration

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