Synthesis and characterization of sodalite–polyimide nanocomposite membranes

Li, Dan, Zhu, Huai Yong, Ratinac, Kyle R., Ringer, Simon P., & Wang, Huanting (2009) Synthesis and characterization of sodalite–polyimide nanocomposite membranes. Microporous and Mesoporous Materials, 126(1-2), pp. 14-19.

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Nanocomposite membranes are fabricated from sodalite nanocrystals (Sod-N) dispersed in BTDA-MDA polyimide matrices and then characterized structurally and for gas separation. No voids are found upon investigation of the interfacial contact between the inorganic and organic phases, even at a Sod-N loading of up to 35 wt.%. This is due to the functionalization of the zeolite nanocrystals with amino groups (==Si_(CH3)(CH2)3NH2), which covalently link the particles to the polyimide chains in the matrices. The addition of Sod-N increases the hydrogen-gas permeability of the membranes, while nitrogen permeability decreases. Overall, these nanocomposite membranes display substantial selectivity improvements. The sodalite–polyimide membrane containing 35 wt.% Sod-N has a hydrogen permeability of 8.0 Barrers and a H2/N2 ideal selectivity of 281 at 25 C whereas the plain polyimide membrane exhibits a hydrogen permeability of 7.0 Barrers and a H2/N2 ideal selectivity of 198 at the same testing temperature.

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8 citations in Web of Science®

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ID Code: 29641
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Sodalite, Polyimide, Nanocomposite membrane, Hydrogen separation
DOI: 10.1016/j.micromeso.2009.05.014
ISSN: 1387-1811
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Deposited On: 13 Jan 2010 21:58
Last Modified: 25 Feb 2013 02:46

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