Characterization of the PPO dense membrane prepared at different temperatures by ESR,atomic force microscope and gas permeation |
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| Institution: | 1. Industrial Membrane Research Institute, Chemical Engineering Department, University of Ottawa, Ottawa, Ontario, K1N 6N5 Canada;2. Physics Department, University of Ottawa, Ottawa, Ontario, Canada;1. Department of Invertebrate Zoology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, Toruń 87-100, Poland;2. Department of Hydrobiolgy, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, Toruń 87-100, Poland;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, China;2. College of Physical Science and Technology, Yulin Normal University, Yulin, Guangxi 537000, China;3. Laser Technology Institute, Tianjin Polytechnic University, Tianjin 300387, China;1. Department of SDM (Semiconductor Display Mechatronics), Kyonggi University, 94-6,Yiui-dong, Yeongtong-gu, Suwon, Gyeonggi-do 443-760, Republic of Korea;2. Advanced Materials and Devices Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-Gu, Daejeon 305-343, Republic of Korea;3. Department of Advanced Materials Engineering, Kyonggi University, 94-6, Yiui-dong, Yeongtong-gu, Suwon, Gyeonggi-do 443-760, Republic of Korea |
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| Abstract: | Dense (homogeneous) membranes were prepared from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) by using 1,1,2-trichloroethylene as a solvent at different solvent evaporation temperatures (22,4 and −10°C). The effect of temperature used during evaporation of solvent on the characteristics of the membrane was studied by using electron spin resonance, atomic force microscopy and gas permeation rate. The morphology of the surfaces of the membrane, the shape of spin probe in the membrane, and the selectivity of gases depend on the temperature of evaporation of solvent. The permeation rate of CO2 increased with the decrease in the temperature used for the preparation of the membrane. However methane permeation rate increased in the membrane prepared at −10°C. It is suggested that Langmuir sites could be favorable for the CH4 permeation. |
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