高強度聚乙烯醇物理共熔凝膠：聚合物分子量、DES 組成和熱處理的影響

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莊瑞民(Ruei-Min Chuang) 查詢紙本館藏

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化學工程與材料工程學系

論文名稱

高強度聚乙烯醇物理共熔凝膠：聚合物分子量、DES 組成和熱處理的影響
(High-strength Poly(vinyl alcohol) Physical Eutectogels: Effects of polymer molecular weight, DES composition, and heat treatment)

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至系統瀏覽論文 (2029-6-30以後開放)

摘要(中)

使用一步製造製程來製造可拉伸的物理共熔凝膠。將聚乙烯醇（PVA）與作為氫鍵受體的氯化膽鹼以及作為氫鍵供體的乙二醇或甘油（Gly）直接混合。此過程在低共熔溶劑（DES）中形成大量PVA微晶域，這些微晶域充當共熔凝膠中的物理交聯點。研究系統地研究了PVA分子量、DES組成和各種熱處理對共熔凝膠機械性能的影響。應力-應變曲線表明，較高的PVA分子量、在DES中添加Gly以及重複凍融循環可以增強PVA物理共析凝膠的機械性能。最後，使用掃描電子顯微鏡和 X 射線衍射來檢查和分析聚合物網絡和微晶域的孔徑、結晶度和微晶域尺寸。

摘要(英)

A one-step manufacturing process is employed to fabricate stretchable physical eutectogels. It involves directly mixing polyvinyl alcohol (PVA) with choline chloride as a hydrogen bond acceptor and either ethylene glycol or glycerol (Gly) as a hydrogen bond donor. This process results in the formation of numerous crystallite domains of PVA within the deep eutectic solvent (DES), which act as physical crosslinking points in the eutectogel. The study systematically investigates the effects of PVA molecular weight, DES composition, and various heat treatments on the mechanical properties of eutectogels. The stress-strain curves demonstrate that a higher PVA molecular weight, the addition of Gly to the DES, and repeated freeze-thaw cycles can enhance the mechanical properties of the PVA physical eutectogel. Finally, scanning electron microscopy and X-ray diffraction are used to examine and analyze the polymer networks and crystallite domains in terms of pore size, crystallinity, and crystallite domain size.

關鍵字(中)

★ 聚乙烯醇
★ 深共熔溶劑
★ 物理共熔凝膠
★ 結晶度
★ 機械性質

關鍵字(英)

★ polyvinyl alcohol
★ deep eutectic solvent
★ physical eutectogel
★ crystallinity
★ mechanical properties

論文目次

摘要 i
ABSTRACT ii
LIST OF CONTENTS iii
LIST OF FIGURES iv
LIST OF TABLE v
CHAPTER 1 INTRODUCTION 1
CHAPTER 2 EXPERIMENTS 4
2-1 Materials 4
2-2 One-step fabrication of PVA physical eutectogels 4
2-3 Mechanical Test 4
2-4 Conductivity Measurement 5
2-5 Characterization and analysis of eutectogels 5
CHAPTER 3 RESULTS AND DISCUSSIONS 7
3-1 Effect of PVA molecular weight on eutectogel performances 7
3-2 Effect of the DES composition on eutectogel performances 13
3-3 Effect of heat treatment on PVA eutectogel performances 19
CHAPTER 4 CONCLUSION 24
REFERENCES 26

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指導教授

曹恆光(Heng-Kwong Tsao)

審核日期

2024-6-21

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