A compatible crosslinker for enhancement of CO2 capture of poly(amidoamine) dendrimer-containing polymeric membranes

Ikuo Taniguchi, Teruhiko Kai, Shuhong Duan, Shingo Kazama, Hiroshi Jinnai

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Poly(amidoamine) (PAMAM) dendrimers are physically immobilized in a crosslinked poly(ethylene glycol) (PEG) upon photopolymerization of PEG dimethacrylates (PEGDMAs) in the presence of the dendrimers in ethanol. The dendrimer-containing polymeric membranes exhibit excellent CO2 separation properties over smaller H2. However, immiscibility of PEG matrix and the dendrimer results in the formation of a bicontinuous phase-separated structure on a couple of microns scale, which inhibits to reduce the membrane thickness for enhancement of the CO2 permeability. A compatible crosslinker, 4GMAP, is developed from the dendrimer and glycidyl methacrylate. Incorporation of the compatible crosslinker in the photopolymerization suppresses the macrophase separation between PAMAM dendrimer and PEG matrix and allows preparation of polymeric membranes as thin as 10μm with high CO2 selectivity. The 4GMAP incorporation also endows pressure tolerance by increasing crosslinking density of the resulting polymeric membranes. The CO2 permeance is elevated from 9.94×10-13 to 1.68×10-11m3(STP)m-2s-1Pa-1, by reducing the membrane thickness from 640 to 9.5μm with 10 of CO2 selectivity at 313K and 0.56MPa of CO2 partial pressure.

Original languageEnglish
Pages (from-to)175-183
Number of pages9
JournalJournal of Membrane Science
Publication statusPublished - 2015 Feb 1
Externally publishedYes


  • CO separation
  • Crosslinker
  • PAMAM dendrimer
  • Phase separation
  • Polymeric membrane

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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