| Summary: | 碩士 === 國立中興大學 === 化學工程學系所 === 97 === PES/montmorillonite (MMT) composite membranes were successfully prepared by via phase inversion method in this study. The first approach (simple mixing) was to mix commercial PES polymer with Na+–MMT clays in solvent for membrane preparation. The second approach (thermal treatment) was to prepare the T(PES/Na+–MMT) composite membrane. The third approach (modification particles) was to prepare the PES/O–MMT composite membrane. The forth approach (Sulfonation of polyethersulfone) was to prepare the SPES/ Na+–MMT composite membrane. Membrane properties were characterized. The thickness and weight value were very close that about 60 um and 20 mg/disc at different feed MMT wt%. By measuring the cation-exchange capacity and water content that hydrophilicity of composite membranes was analyzed. Their composite membranes are tensile strength as MMT increased by tensile machine. Moreover, the X-ray diffractograms exhibited the change of interlayer spacing of MMT clays in the composite membrane. Membrane morphology was detected by scanning electron microscope.
In their applicabilities, CH4 and CO2 permeability performance of there PES/MMT, T(PES/MMT), PES/OMMT and SPES/MMT composite membranes were investigated. In the gas separation factor value range was 0.4-1 that result may be explained Knudsen flow and Poiseuille flow. In the theory, when they added particles that significantly enhance poiseuille diffusion that depended linearly on the mean pressure, then gas permeability depended linearly on the mean pressure. In fact that tend did not conform to theory. The problem may be some data error, so we may be retest some data.
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