臺灣博碩士論文加值系統

本研究使用醋酸纖維素（cellulose acetate, CA）和摻入無機填料（球形奈米 Titanium dioxide, TiO2）製備為混合基材薄膜（MMMs），由此產生的混合基材薄膜，進行TGA，DSC，SEM和TEM薄膜結構分析。結果發現，當混合基材薄膜於高含量( ≥ 3wt.%)無機填料時，聚集變得更加嚴重。製備CA/TiO2 混合基材薄膜，進行CO2和CH4 的氣體滲透。 CO2/CH4選擇性增加，從15.87（純CA膜）變成為最高值34.30的1 wt.％ TiO2混合基材薄膜，當二氧化鈦含量大於1 wt.％時，選擇率則減少。薄膜型態可分為兩種情形:理想型態( ≤ 2 wt.%) 和 界面孔洞型態( > 2 wt.%) 。高分子與奈米顆粒間產生孔洞和混合基材薄膜的缺陷的形成，導致氣體滲透率上升和氣體的選擇性下降的情形。

Cellulose acetate (CA)-based mixed matrix membranes (MMMs) with the incorporation of inorganic fillers (spherical Titanium dioxide, TiO2 nanoparticles) were prepared in this study. The resulting MMMs were characterized by TGA, DSC, SEM, and TEM. It was found that inorganic filler agglomeration became more serious at higher-filler-content ( ≥ 3wt.%) MMMs. CO2 and CH4 permeabilities were measured for these prepared CA/TiO2 MMMs. The CO2/CH4 selectivity increased from 15.87 (pure CA membrane) to a maximum value of 34.30 at 1 wt.% TiO2 MMM, and then decreased for the TiO2 weight percentages > 1. The membrane morphology may be divided into two cases : ideal morphology ( ≤ 2 wt.%) and interface voids ( > 2 wt.%). The formation of interface voids and membrane defects in MMMs contributed to higher gas permeabilities but lower gas selectivity.

誌謝 i
中文摘要 ii
英文摘要 iii
目錄 iv
圖目錄 v
表目錄 vi
第一章 緒論 1
第二章 文獻回顧 3
2-1薄膜基本簡介 3
2-2 高分子薄膜介紹 4
2-3 氣體分離膜應用與介紹 4
2-4 無機奈米顆粒添加於高分子膜中應用 11
2-5 利用相關公式來預測氣體滲透率 17
2-6 文獻總結 20
第三章 實驗方法 22
3-1 實驗藥品 22
3-2 實驗用氣體 22
3-3 實驗方法 22
3-4 摻混奈米顆粒薄膜的性質量測 23
3-5 摻混奈米顆粒薄膜的氣體滲透實驗 24
第四章 結果與討論 28
4-1 CA和CA/TiO2 摻混薄膜的性質討論 28
4-1-1 薄膜厚度 28
4-1-2 熱重損失分析結果 28
4-1-3微分掃瞄熱量計分析結果 29
4-1-4場發射掃描電子顯微鏡(SEM)分析結果 30
4-1-5穿透式電子顯微鏡(TEM)分析結果 30
4-2 CA和CA/TiO2摻混奈米顆粒薄膜的氣體滲透結果 31
4-3 Robeson’s upper bounds的比較 33
第五章 結論 44
第六章 參考文獻 45

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