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標題: 嵌段共聚物於三維侷限空間下之自組裝行為
Block Copolymer Self-Assemblies in A 3D Confinement
作者: 戴宗成
Tsung-Chen Tai
關鍵字: 嵌段共聚物;自組裝;侷限空間;微觀相分離;界面性質;block copolymer;self-assembly;hard confinement;3D;hierarchical structure
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嵌段共聚物(block copolymer)在特定的條件控制下會進行自組裝(self-assemble)形成不同的奈米微結構,如圓球、圓 柱、網狀與層板結構,且在空間侷限下其形態會變得更為複雜。本研究結合嵌段共聚物自組裝行為與三維侷限空間效應,探討嵌段共聚物在侷限空間下的自組裝行為改變。首先利用無乳化劑乳化聚合方式製備高分子蛋白石微球 (opal),再製成反蛋白石結構,以之為模板填入聚苯乙烯-b-聚乳酸嵌段共聚物(PS-b-PLA),探討不同控制參數: 如模板的親疏水性、粒徑、嵌段共聚物的體積分率等影響,以穿透式電子顯微鏡(TEM)觀察其自組裝型態變化。由於聚乳酸鏈段可輕易地被鹼液水解移除,而得到多層次(hierarchical)的孔洞結構,具有作為過濾與催化元件的應用潛力。

Block copolymers (BCP) can self-assemble to form ordered morphologies at nanometer scales, making them ideal materials for various applications. The self-assembly of BCPs is mainly controlled by the monomer–monomer interactions, block compositions and molecular architectures. Also, placing BCPs under confinement attracts people's attention because of their diversity of self-assembled morphologies. Here we use cylinder-forming PS-PLLA BCPs as a model system to study their self-assembly behaviors in a 3D confinement. Polymeric and ceramic inverse opals are served as templates for the 3D confinement. PUA and SiO2 inverse opals are used for the polymeric and ceramic 3D confinement structure, respectively. A variety of factors including hydrophilic property of template, intrinsic template property, and confinement size are performed. After hydrolysis of PLLA block, the hierarchical structure with high surface area should have great potential for filter application.
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