Mixed matrix membranes incorporated with size-reduced Cu-BTC for improved gas separation

Ge, Lei and Zhou, Wei and Rudolph, Victor and Zhu, Zhonghua (2013) Mixed matrix membranes incorporated with size-reduced Cu-BTC for improved gas separation. Journal of Materials Chemistry A, 1 (21). 6350-6358 . ISSN 2050-7488

Abstract

Metal-organic frameworks (MOFs), with large surface area and selective gas adsorption capability, can be the promising additives in mixed matrix membranes (MMMs) for potential gas separation. In this study, mixed matrix membranes with dispersed Cu-BTC [Cu3(BTC)2] have been fabricated and employed for gas separation. The sonication treatment was adopted to reduce the crystal size of MOFs and improve their affinity to the polymer matrix. The crystal structure, surface area and gas adsorption properties of as-synthesized and sonication-treated Cu-BTC were measured and compared. The morphology of the derived mixed matrix membranes varied with sonication intensity and Cu-BTC particle size, and the elimination of interfacial voids indicated the improvement of the adhesion between Cu-BTC crystals and the polymer matrix. The permeation test revealed that the gas permeance and selectivity of membranes depend on the crystal size of Cu-BTC fillers. Incorporation of the sonicated Cu-BTC results in enhancing both gas permeability and selectivity of the derived mixed matrix membranes. The analysis of permeation and gas sorption results also indicates that MOFs improve both diffusivity and solubility of gas molecules thus enhancing the permeability and selectivity of the membrane.


Statistics for USQ ePrint 31145
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version due to publisher copyright policy.
Faculty / Department / School: No Faculty
Date Deposited: 05 May 2017 01:00
Last Modified: 05 May 2017 01:00
Uncontrolled Keywords: crystalline materials; gas adsorption; gases; grain size and shape; permeation; separation; sonication adsorption capability; adsorption properties; gas separations; interfacial voids; large surface area; metalorganic frameworks (MOFs); mixed matrix membranes; sonication treatment; gas permeable membranes
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1039/c3ta11131h
URI: http://eprints.usq.edu.au/id/eprint/31145

Actions (login required)

View Item Archive Repository Staff Only