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標題: PES/蒙脫土複合薄膜之製備與氣體輸送應用
Preparation of polyethersulfone/montmorillonite membranes for gas transport
作者: 吳振維
wu, Jhen-wei
關鍵字: polyethersulfone
gas transport
出版社: 化學工程學系所
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摘要: 本研究利用相轉移法製備PES/蒙脫土(montmorillonite, MMT) 複合薄膜,第一部份使用摻混方法製備出PES/MMT複合薄膜,第二部分利用熱處理方法製備出T(PES/MMT) 複合薄膜,第三部分則使用改質的有機蒙脫土(O-MMT)製備PES/OMMT複合薄膜,第四部份則利用磺化PES(SPES)製備出SPES/OMMT複合薄膜。本研究並分析複合薄膜的相關性質:先測量其膜厚接近60 um/disc及膜重接近20 mg/disc證明增加蒙脫土沒有變化,進而量測離子交換容量、水含量可分析本研究所製備薄膜之親疏水性,再利用拉力測試儀觀察增加蒙脫土其拉力變化。此外,本研究亦利用寬角度X光繞射分析儀(WXRD)判斷蒙脫土於薄膜內其層間距的變化。另以掃描穿透式電子顯微鏡(FE-SEM)觀察薄膜截面的特徵型態。 在應用部分,本研究使用PES/MMT、T(PES/MMT)、PES/OMMT和SPES/MMT等四種複合薄膜進行CO2及CH4之氣體滲透程序。於氣體分離係數發現CO2/CH4大部分數值在0.4-1之間,由此判斷氣體滲透行為為Knudsen和Poiseuille。 但理論上蒙脫土添加越多導致的自由空隙越多,使得Poiseuill行為明顯,若Poiseuille明顯則導致氣體滲透跟二端壓力和呈線性成長。不過實際上趨勢卻不是如此。可能是有部分數據有問題,這些數據該重新去測試,找出實際趨勢。
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.
其他識別: U0005-1908200914432500
Appears in Collections:化學工程學系所



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