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研究生:黃俊傑
研究生(外文):Chun-Chien Huang
論文名稱:幾丁聚醣/聚乙烯醇形成網狀結構於滲透蒸發上之應用
論文名稱(外文):Application on Pervaporation of Network Structure based on Chitosan/Poly(vinyl alcohol)
指導教授:王怡仁王怡仁引用關係
指導教授(外文):Yem-Zen Wang
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:工業化學與災害防治研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2004
畢業學年度:92
語文別:中文
論文頁數:88
中文關鍵詞:聚乙烯醇戊二醛摻合交聯滲透蒸發幾丁聚醣
外文關鍵詞:BlendGlualdehydePVAChitosanCrosslinkingPervaporation
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本研究旨在利用網狀結構體薄膜,進行乙醇水溶液的分離.網狀結構體的合成乃先以幾丁聚醣(Chitosan)與聚乙烯醇(PVA)以不同重量比摻合,再添加戊二醛為交聯劑進行交聯,形成網狀結構,以期改善幾丁聚醣與聚乙烯醇遇水時的膨潤性,並增加其自由體積,以獲致進行滲透蒸發時,能有更大的分離效能.幾丁聚醣與聚乙烯醇交聯結構的合成反應以FTIR進行鑑定,並以膨潤測試(swelling test)確認幾丁聚醣與聚乙烯醇的交聯程度;以TGA測量幾丁聚醣與聚乙烯醇交聯後的熱性質,以X-ray及MDSC中分析交聯前後各組成結晶的變化.以密度測量估算交聯前後自由體積的變化.實驗結果發現,幾丁聚醣與聚乙烯醇的確已交聯,而且在熱性質及機械性質都有提升,交聯後結晶度下降,且交聯後幾丁聚醣薄膜的自由體積增加.應用於滲透蒸發時發現,改質後的薄膜通量有比純的幾丁聚醣薄膜增加,選擇率也大有提升.
In this study, we use the network structure membrane to separation ethanol and water mixture. The network structure membrane were synthetic by polyblends composed of chitosan and poly vinyl alcohol (PVA) with various ratios than reacted with glutaraldehyde form net structure to improve chitosan/PVA membrane’s swelling in water and increase chitosan membrane’s free volume. We hope the prepared crosslinking membranes can increase permeation rate when it was used to separate the alcohol and water mixtures. The crosslinking reaction were confirmed by FT-IR. A swelling test are used to proof the membrane is crosslinking or not. The thermal properties of crosslinked membrane were evaluated by thermal gravimetric analysis (TGA).The degree of crystal of crosslinked membrane were evaluated by X-ray and modulated differential scanning calorimetry (MDSC). The density measured by density test evaluate free volume. The experiment results show that crosslinking reaction is observed. The thermal properties and the mechanical properties were arise. After crosslinking reaction, the degree of crystal were decrease. According to the density data, the density were decreased after crosslinking reaction. It is meaning that the free volume were increased. We observe that crosslinking
membranes have more permeation rate than pure membranes, and the separation factor also arise.
中文摘要--------------------------------------------i
英文摘要--------------------------------------------ii
誌謝------------------------------------------------iv
目錄------------------------------------------------v
圖目錄---------------------------------------------viii
表目錄----------------------------------------------xi
第一章 緒論---------------------------------------1
1-1 薄膜簡介----------------------------------------1
1-2 薄膜之定義--------------------------------------2
1-3 滲透蒸發----------------------------------------4
1-3.1 簡介滲透蒸發----------------------------------4
1-3.2 滲透蒸發應用於分離技術------------------------5
1-4 薄膜之傳輸機制及分離理論------------------------6
第二章 文獻回顧----------------------------------10
2-1 滲透蒸發---------------------------------------10
2-1.1 薄膜結構改良---------------------------------10
2-1.2 薄膜材料改質---------------------------------12
2-2 實驗基材---------------------------------------15
2-2.1 幾丁聚醣-------------------------------------15
2-2.1-1 簡介幾丁聚醣-------------------------------15
2-2.1-2 幾丁聚醣的應用-----------------------------16
2-2.1-3 幾丁聚醣的結晶-----------------------------20
2-2.2 聚乙烯醇-------------------------------------21
2-2.2-1 簡介聚乙烯醇-------------------------------21
2-2.2-2 聚乙稀醇的應用-----------------------------23
2-3 研究動機與目標---------------------------------24
2-4 實驗架構---------------------------------------26
第三章 實驗--------------------------------------27
3-1 實驗藥品---------------------------------------27
3-2 實驗儀器設備-----------------------------------28
3-3 實驗流程---------------------------------------30
3-3.1 幾丁聚醣與聚乙烯醇摻合膜的製備---------------30
3-3.2 幾丁聚醣與聚乙烯醇交聯膜的製備---------------31
3-3.3 應用在滲透蒸發之幾丁聚醣與聚乙烯醇交聯膜的製備---------------------------------------------------32
3-4 實驗步驟---------------------------------------33
3-4.1 幾丁聚醣與聚乙烯醇掺合膜的製備---------------33
3-4.2 幾丁聚醣與聚乙烯醇掺合交聯膜的製備-----------33
3-5 性質測試---------------------------------------34
第四章 結果與討論--------------------------------40
4-1 化學結構鑑定-----------------------------------40
4-1.1 傅立葉轉換顯微紅外線光譜儀-------------------40
4-1.2 溶解性質測試(Swelling test)------------------41
4-2 微結構分析-------------------------------------45
4-2.1 X 光薄膜繞射(X-ray)--------------------------45
4-2.2 調幅式微差掃描分析儀(Modulated Differential
Scanning Calorimeter, MDSC)------------------------48
4-2.3動態機械分析儀(Dynamic Mechanical Analyzer, DMA)
---------------------------------------------------50
4-2.4 掃描式電子顯微鏡(Scanning Electron Microscope,SEM)
----------------------------------------------------54
4-2.5 密度測量儀------------------------------------56
4-3 熱性質分析--------------------------------------58
4-3.1調幅式熱重損失分析儀(Modulated Thermogravimetric Analyzer,TGA)---------------------------------------58
4-4 機械性質分析------------------------------------63
4-4.1動態機械分析儀(Dynamic Mechanical Analyzer, DMA)
----------------------------------------------------63
4-4.2 薄膜萬能拉力機--------------------------------66
4-5 滲透蒸發----------------------------------------69
4-5.1 膨潤度測試(Swelling test)---------------------69
4-5.2 滲透蒸發效能----------------------------------73
4-5.2-1 分離濃度為51wt%乙醇時之分離效能-------------73
4-5.2-2 分離濃度為90wt%乙醇時之分離效能-------------76
第五章 結論----------------------------------------79
第六章 參考文獻-----------------------------------80
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