Journal article
The thickness dependence of Matrimid films in water vapor permeation
GQ Chen, CA Scholes, CM Doherty, AJ Hill, GG Qiao, SE Kentish
Chemical Engineering Journal | ELSEVIER SCIENCE SA | Published : 2012
Abstract
Composite or asymmetric membranes with thin active layers are used in industrial spiral-wound and hollow fiber modules to maximize productivity. These thin active layers are more susceptible to plasticization and undergo physical aging more rapidly than thick films. In this work, the sorption and transport properties of poly(3,3'-4, 4'-benzophenone tetracarboxylic-dianhydride diaminophenylindane) (Matrimid® 5218) as membranes of thickness 1-58μm were studied with mixed gas/water vapor feed streams (CH4, CO2 and H2O) at 7.5bar and 35°C. The fractional free volume (FFV) of the films decreased significantly with decreasing film thickness for films below 10-15μm. Water vapor solubility was indep..
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Funding Acknowledgements
The authors would like to thank the Particulate Fluids Processing Centre (PFPC), a Special Research Centre of the Australian Research Council for access to equipment, and Bio21 Institute EM Unit, Bio21 Molecular Science & Biotechnology Institute, University of Melbourne for SEM imaging support. Funding for this CO2CRC Project is provided by the Australian Government through its CRC program. CMD and AJH acknowledge the support of CSIRO's Office of the Chief Executive Science Leader program.