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Title: PIM-1 as an organic filler to enhance the gas separation performance of Ultem polyetherimide
Authors: Hao, L.
Li, P.
Chung, T.-S. 
Keywords: Model prediction
Organic filler
Polymer blend
Issue Date: 1-Mar-2014
Citation: Hao, L., Li, P., Chung, T.-S. (2014-03-01). PIM-1 as an organic filler to enhance the gas separation performance of Ultem polyetherimide. Journal of Membrane Science 453 : 614-623. ScholarBank@NUS Repository.
Abstract: An assortment of Ultem/PIM-1 polymer blends was prepared and their transport properties to a series of gases were studied. Good dispersion between the PIM-1 and Ultem phases was found when the PIM-1 loading was low (90wt%). A slight shift of Tg was observed when the PIM-1 loading increased from 0wt% to 50wt%, suggesting likely partially miscibility. The molecular-level interactions were further confirmed by the FTIR and XRD data, where shifts of peaks were detected at several compositions. Gas transport properties of pure gases including He, N2, O2, CH4, CO2 for all polymer blends and mixed gases including CO2/CH4 (50/50) and CO2/N2 (50/50) gas pairs for Ultem/PIM-1 (90:10) and Ultem/PIM-1 (80:20) blends were explored. Considerable increments in gas permeability were observed by adding only 5 or 10wt% PIM-1 without much compromising gas pair selectivity, i.e., the CO2 permeability increased impressively over 47% and 167%, respectively, compared with the pristine Ultem. When comparing the gas permeation properties with the predictions from semi-logarithm and Maxwell equations, they follow nicely with the semi-logarithm addition when the PIM-1 loadings are low (90wt%) due to the good dispersion of Ultem inside PIM-1. This study opens up the potential of employing PIM-1 as an organic filler to improve the permeability of low permeable materials for other industrial membrane applications. © 2013 Elsevier B.V.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/j.memsci.2013.11.045
Appears in Collections:Staff Publications

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