Effects of low molecular weight photosensitizer and UV irradiation on gas permeability and selectivity of polyimide membrane |
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| Institution: | 1. Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran;2. Faculty of Chemical Engineering, Babol University of Technology, P.O. Box 484, Babol, Iran;1. Membrane Research Laboratory, Caspian Faculty of Engineering, College of Engineering, University of Tehran, Tehran 43841-119, Iran;2. Industrial Membrane Research Institute, Department of Chemical Engineering, University of Ottawa, Ottawa, Canada;1. The School of Chemical Engineering and Analytical Science, The University of Manchester, M13 9PL, United Kingdom;2. The School of Chemistry, The University of Manchester, M13 9PL, United Kingdom;1. Energy Safety Research Institute (ESRI), Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK;2. Centre for Water Advanced Technologies and Environmental Research (CWATER), College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK;1. Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, United States;2. Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;3. The Commonwealth Scientific and Industrial Research Organization (CSIRO) Manufacturing, Private Bag 10, Clayton South, Victoria 3169, Australia |
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| Abstract: | A polyimide membrane, 6FDA–TMPD, was prepared from 5,5′-2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]bis-1,3-isobenzofurandione (6FDA), and 2,4,6-trimethyl-1,3-phenylenediamine (TMPD). The effect of ultraviolet irradiation (UV irradiation) using a high-pressure mercury lamp on the gas transport properties of the 6FDA–TMPD membrane and membranes containing a photosensitizer was explored. Comparison between UV treatment and thermal treatment was also examined. The gas selectivities in all membranes were increased due to the irradiation. Especially in the H2/N2 and H2/CH4 separations, the selectivities effectively increased without a significant reduction in the H2 permeability. These increases were considerable in the membrane having no photosensitizer which was expected to be an initiator for the cross-linking reaction. There was little effect of cross-linking, which was formed by the irradiation, on the gas permeation properties. Photosensitizers prevented drastic change in the membrane morphologies due to the irradiation. |
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