研究生: |
吳家旺 Jia-Wang Wu |
---|---|
論文名稱: |
聚乙烯濾膜表面改質並探討其過濾表現 Surface modification of polyethylene membranes for the applications in filtration |
指導教授: |
王孟菊
Meng-Jiy Wang |
口試委員: |
周秀慧
Shiu-Huey 何明樺 Ming-Hua Ho 李振綱 Cheng-Kang Lee |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2011 |
畢業學年度: | 99 |
語文別: | 中文 |
論文頁數: | 90 |
中文關鍵詞: | 表面改質 、聚乙烯 、聚乙二醇 、親水性 、過濾 、電漿改質 、PNVP |
外文關鍵詞: | Surface modification, polyethylene, polyethylene glycol, hydrophilic, filtration, plasma modification, poly(N-vinyl-2-pyrrolidone) |
相關次數: | 點閱:296 下載:2 |
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本研究利用聚乙烯 (polyethylene, PE) 做為濾膜,以親水性高分子,例如:聚多巴胺 (polydopamine)、聚乙烯基咯烷酮 (poly (N-vinyl-2-pyrrolidone), PNVP) 和聚乙二醇 (polyethylene glycol, PEG) 與其衍生物,修飾PE膜表面,並進行經過修飾濾膜的表面分析,利用甘油接觸角 (glycerol contact angle) ,量測表面相對親疏水性,使用SEM觀察改質前後濾膜的差異,利用FTIR鑑定官能基,利用ESCA分析表面化學組成。分析結果發現,經過不同表面改質方法,甘油接觸角於統計學上有明顯差異,顯示PE膜經過修飾,會提升其親水性;由表面型態上,PE經過修飾後,沒有明顯的差異;從FTIR和ESCA分析結果發現,親水性高分子皆存在於PE膜表面上。由過濾結果發現,經過poly(PEGMA-co-AA)修飾、PNVP、PEG (分子量:2,000)和PEG(分子量:5,000)修飾PE膜,過濾量皆從26 g提升至70 g,過濾通量皆從38 Lm-2h-1提升到100 Lm-2h-1,顯示經過親水性高分子修飾,可以有效提升過濾量與過濾通量以及延緩通量下降的趨勢。
Abstract
Polyethylene (PE) is a hydrophobic, biocompatible polymer with high excellent mechanical strength. In this work, the hydrophilic polymer, polydopamine, poly(N-vinyl-2-pyrrolidone) (PNVP), polyethylene glycol (PEG) and its derivatives were coated on the surface of PE membrane via oxygen plasma treatment or dipping technique. The hydrophilicity of the membranes was measured by glycerol contact angle. The chemical composition of original and modified membranes was characterized by attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and electron spectroscopy for chemical analyzer (ESCA). The morphology of the modified membranes was investigated by scanning electron microscopy (SEM). Hydrophobic PE porous membranes were easily modified by O2 plasma treatment and coating polydopamine, mPEG-N3, poly(PEGMA-co-AA), PNVP, PEG-2000, and PEG-5000. The hydrophilicity of PE membranes was significantly improved from result of glycerol contact angle measurement. On filtration experiment, the final weight and flux of all modified membranes were higher than pristine PE membrane.
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