具咪唑鹽之無規與雙連續高分子陰離子傳導膜的開發與製備

陳勝泓(Sheng-hong Chen)

指導教授 ： 陳銘洲

國立中央大學/理學院/化學系/碩士(2014年)

摘要

本實驗室開發出無規與雙連續共聚物兩系列陰離子交換膜。第一系列高分子以開環移位聚合反應 (ROMP, Ring-Opening Metathesis Polymerization) 進行聚合，將具親水性的 NB-Imidazole iodide 和具疏水性的 NB-Hex 在第二代 Grubbs 催化劑的催化下進行開環移位聚合反應，得到親疏水端隨機分佈的無規共聚物。調控反應中親疏水端的當量數比來得到不同親疏水端比例的高分子。此系列高分子薄膜在常溫去離子水中導電度最高可達 0.038 S/cm。第二系列高分子以原子轉移自由基聚合反應 (ATRP, Atom Transfer Radical Polymerization) 與開環移位聚合反應 (ROMP, Ring-Opening Metathesis Polymerization) 分兩階段聚合。利用 ATRP 聚合出第一段疏水端 PSBuNB，接著再以 ROMP 聚合第二段帶有咪唑鹽 (imidazolium group) 的 NB-Imidazole iodide 而得到雙連續相共聚物 PSBuNB-g-poly(NB-Im-I)。調控 PSBuNB 的比例而得到不同比例的親疏水端高分子。此系列高分子薄膜在常溫去離子水中導電度最高可達 0.041 S/cm，有望可應用在固態鹼性燃料電池當中。

關鍵字

咪唑鹽 ； 陰離子交換膜

並列摘要

In this study, I have prepared two kinds of anion exchange membranes through random and bicontinuous polymerization. First, random copolymer was prepared via ring-opening metathesis polymerization (ROMP) of hydrophilic NB-Imidazole iodide and hydrophobic NB-Hex by using second generation Grubbs catalyst. The ratio of hydrophilic and hydrophobic units in the random copolymer can be controlled by changing the reactant equivalents. This series of membranes exhibits the highest ionic conductivity of 0.038 S/cm in deionized water at room temperature. Second, a series of novel bicontinuous copolymer, PSBuNB-g-poly(NB-Im-I), was prepared via atom transfer radical polymerization (ATRP) and ring-opening metathesis polymerization (ROMP) for alkaline anion exchange membrane fuel cells (AEMFC). Firstly, atom transfer radical polymerization of hydrophobic PSBuNB fragment. Secondly, ring-opening metathesis polymerization of hydrophilic NB-Imidazole iodide fragment. The hydrophobic part in the polymer can be controlled with PSBuNB. The bicontinuous membrane exhibited the highest ion conductivity of 0.041 S/cm in deionized water at room temperature.

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