Effect of 4-hydroxybenzoic acid on CO2 separation performance of poly(ethylene oxide) membrane
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We successfully prepared highly selective poly(ethylene oxide) (PEO) membranes containing 4-hydroxybenzoic acid for CO2 separation. Because 4-hydroxybenzoic acid contains a benzene ring that acts as a barrier against gas transport and also contains hydroxyl and carboxyl groups that enhance the solubility of CO2 molecules, the incorporation of 4-hydroxybenzoic acid was expected to substantially increase the CO2/N2 selectivity. Indeed, when 4-hydroxybenzoic acid was incorporated into the PEO matrix, the CO2/N2 selectivity increased from 1.8 to 23 with a CO2 permeance of 8.8 GPU. The coordinative interactions of 4-hydroxybenzoic acid in the PEO matrix were confirmed by Fourier transform infrared spectroscopy. Additionally, thermogravimetric analysis verified that 4-hydroxybenzoic acid was strongly stabilized in the polymer matrix.
Keywordsmembrane CO2 separation poly(ethylene oxide) 4-hydroxybenzoic acid
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- (1).Climate Change 2007: The Physical Science Basis, S. Solomon, D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller, Eds., Cambridge University Press, Cambridge, UK, 2007, 996.Google Scholar
- (10).S. Shelly, Chem. Eng. Prog., 105, 42 (2009).Google Scholar