Molecular design of nanohybrid gas separation membranes for optimal CO 2 separation

Cher Hon Lau, Donald R. Paul, Tai-Shung Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Organic-inorganic materials comprising CO2-philic components may yield superior CO2 transport properties and good CO 2/H2 gas selectivity. We report that a fine balance in size heterogeneity in the silicon-based structures is essential and a mixture of sizes up to 50 nm surrounded by 5-15 nm silicon-based nanostructures is the preferred inorganic phase morphology that yields optimal nanohybrid membranes. The combination of optimal synthesis conditions i.e. water/silicon ratio, condensation and ozone pre-treatment durations yields a nanohybrid membrane with a CO2 permeability of 2000 Barrer while achieving a CO 2/H2 selectivity of 11. The findings of this work are important for the design of gas separation membranes using green materials.

Original languageEnglish (US)
Pages (from-to)454-465
Number of pages12
JournalPolymer
Volume53
Issue number2
DOIs
StatePublished - Jan 24 2012

Keywords

  • Hybrid materials
  • Nanohybrid membranes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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