溶劑品質對聚(苯乙烯-b-環氧乙烷)在四氫呋喃/醇類共溶劑中的鏈聚集、自組裝、微胞化的影響

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黃冠銘(Kuan-Ming Huang) 查詢紙本館藏

畢業系所

化學工程與材料工程學系

論文名稱

溶劑品質對聚(苯乙烯-b-環氧乙烷)在四氫呋喃/醇類共溶劑中的鏈聚集、自組裝、微胞化的影響
(Effects of Solvent Quality on Chain Clustering, Self-Assembly, and Micellization for Polystyrene-block-Poly(ethylene Oxide) in Binary THF/Alcohol Cosolvents)

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至系統瀏覽論文 (2026-7-25以後開放)

摘要(中)

我們透過小角度X射線散射(Small-Angle X-ray Scattering, SAXS)定量地研究了醇類含量對聚(苯乙烯-b-環氧乙烷)(Poly(styrene-block-ethylene oxide), PS-b-PEO)嵌段共聚物在四氫呋喃(THF)與醇類(甲醇、乙醇、正丙醇、異丙醇及正丁醇)的共溶劑中的自組裝行為的影響。在純THF的稀釋濃度下，PS-b-PEO傾向形成聚集體。當少量的水添加到THF中時，PS-b-PEO會形成具有相關非均勻性的有序結構，通過相分離生成。然而，當PS-b-PEO溶解在THF/醇類(甲醇、乙醇、正丙醇、異丙醇及正丁醇)共溶劑中時，這些凝膠結構是不存在的。當甲醇添加到溶液後，溶劑的品質會降低。我們通過計算臨界微胞濃度(Critical Micelle Concentration, CMC)和溶解度參數(Solubility Parameter)，討論了PS-b-PEO在不同比例的共溶劑與不同類型的醇類的結構演變。隨著THF/甲醇共溶劑中，甲醇含量的增加，溶液從聚集體轉變為具有核殼結構的分散微胞。

摘要(英)

We have quantitatively investigated the effect of the alcohols(methanol, ethanol, 1-propanol, 2-proapnol, and 1-butanol) of various contents on the self-assembly behavior of polystyrene-block-poly(ethylene oxide)(PS-b-PEO) in cosolvents of tetrahydrofuran with alcohols(methanol, ethanol, 1-propanol, 2-proapnol, and 1-butanol) by small-angle X-ray scattering(SAXS). At a dilute polymer concentration in neat tetrahydrofuran(THF), PS-b-PEO preferentially forms clusters. However, when a small amount of water is added into THF, PS-b-PEO forms an ordered structure with correlated inhomogeneities generated through mesophase separation. Nevertheless, these gels are absent when PS-b-PEO is dissolved in THF/alcohols(methanol, ethanol, 1-propanol, 2-proapnol, and 1-butanol) cosolvents. After adding methanol to THF, the solvent quality would be reduced. We discuss the structural evolution of PS-b-PEO in different ratios of cosolvents and different types of alcohols(methanol, ethanol, 1-propanol, 2-proapnol, and 1-butanol) by calculating critical micelle concentration(CMC) and solubility parameters. As the content of methanol in THF/methanol cosolvents increases, the solutions transform from clusters to dispersed micelles with a core-shell conformation.

關鍵字(中)

★ 自組裝
★ 鏈聚集
★ 溶劑品質
★ 微胞化

關鍵字(英)

論文目次

摘要 ii
Abstract iii
目錄 iv
圖目錄 vi
表目錄 x
第1章簡介 1
1.1 前言 1
1.1.1 奈米藥物[2] 2
1.1.2 分級多孔材料[3] 3
1.1.3 鋰離子電池之奈米結構聚合物電解質[4] 4
1.1.4 分離膜[5] 5
1.2 溶液之兩親性嵌段共聚物 6
1.2.1 微胞之生成 6
1.2.2 嵌段共聚物 7
1.2.3 嵌段共聚物在溶液中的自組裝行為 8
1.2.4 影響自組裝嵌段共聚物形態之因素 10
1.2.5 凝膠 ( Gel ) 17
1.3 研究動機 18
第2章實驗方法 19
2.1 實驗藥品 19
2.2 樣品製備 22
2.2.1 嵌段共聚物在純THF中 22
2.2.2 濃度固定-嵌段共聚物THF/Alcohol之共溶劑系統 23
2.2.3 濃度改變-嵌段共聚物THF/Alcohol之共溶劑系統 24
2.3 實驗儀器 25
2.4 嵌段共聚物的溶液分析 27
2.5 擬合軟體 28
2.5.1 Correlation_Length 模型 29
2.5.2 Two_Lorentzian模型 29
2.5.3 Teubner_Strey模型 30
2.5.4 Broad_Peak 模型 31
2.5.5 Lorentz 模型 31
第3章實驗結果與討論 32
3.1 嵌段共聚物在中性溶劑THF中 32
3.1.1 高濃度嵌段共聚物在中性溶劑THF中 33
3.1.2 低濃度嵌段共聚物在中性溶劑THF中 36
3.2 嵌段共聚物在共溶劑THF/Alcohol中 38
3.2.1 巨觀溶液與SAXS結果 39
3.2.2 嵌段共聚物共溶劑系統之討論 52
第4章結論 60
參考文獻 61
附錄 68

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指導教授

黃俊仁孫亞賢(Chun-Jen Huang Ya-Sen Sun)

審核日期

2023-7-26

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