Characterization of gas transport in selected rubbery amorphous polyphosphazene membranes |
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| Institution: | 1. Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID 83415-2208, USA;2. Department of Chemical Engineering, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA;1. Catalysis Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands;2. Organic Materials and Interfaces, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629HZ Delft, The Netherlands;3. KAUST Catalysis Center, King Abdullah University of Science and Technology, Advanced Catalytic Materials, Thuwal 23955, Saudi Arabia;1. Department of Chemical Engineering, COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan;2. Department of Mechanical Engineering, University of Engineering & Technology, Lahore, Pakistan;3. Interdisciplinary Research Center in Biomedical Materials, COMSATS Institute of Information Technology, Defence Road, Off Raiwind Road, Lahore 54000, Pakistan;4. Department of Chemistry, College of Science and Humanities, Prince Sattam bin Abdulaziz University, P.O. Box 83, Alkharj 11942, Saudi Arabia;5. Department of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, Perak 32610, Malaysia;1. Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, PR China;2. Tianjin Key Laboratory of Membrane Science and Desalination Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, PR China;3. Key Laboratory of Nuclear Radiation and Nuclear Energy Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, PR China;1. Membrane Science and Technology Research Group, Department of Chemical Engineering, Tarbiat Modares University, Jalal-Ale-Ahmad, Tehran, Iran;2. Material and Nuclear Fuel Research School (MNFRS), Nuclear Science and Technology Research Institute (NFCRS), Tehran, Iran |
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| Abstract: | Gas permeabilities for six different gases have been evaluated for a series of closely related polyphosphazenes. Polyphosphazenes are attractive polymers for use as gas separation membranes due to their inherent chemical, thermal, and radiation stability. Additionally, polyphosphazenes may be tailored for specific chemical affinities. In this report, polyphosphazenes with three different pendant groups with varied hydrophilicity were characterized for gas permeation. All polymers were characterized as having modest permeabilities for methane, oxygen, nitrogen, helium, and hydrogen. These gases were not observed to have a significant interaction with the polymer structure and transport is attributed to segmental chain motion. Carbon dioxide was found to have a significant intermolecular interaction with the polymer and the permeability was observed to be proportional to the percentage of hydrophilic 2-(2-methoxyethoxy)ethanol on the backbone. Thus, we report a promising method for the development of CO2 selective membranes. |
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