(1) Magnetic stirring for more than 5h to obtain a uniform solution.
£¨2£©We test the permeation flux of a gas CO2 by a traditional variable volume method.£¨3£©By contrast, after PEG was added, the surface of mixed matrix membrane became smoother.
£¨4£©Since the gas with a large apparent activation energy is very sensitive to temperature, it is very dependent on temperature for permeation.

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