具咪唑鹽之離子交換膜之開發與製備

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題名:	具咪唑鹽之離子交換膜之開發與製備
作者:	羅子杰;Lo, Tzu-Chieh
貢獻者:	化學學系
關鍵詞:	高分子;polymer
日期:	2019-07-23
上傳時間:	2019-09-03 14:28:16 (UTC+8)
出版者:	國立中央大學
摘要:	本論文以開發含有親水端之聚合新單體，用以製備三系列具親水端之離子高分子。第一系列為中溫燃料電池離子交換膜 PNBC 的開發。首先製備出親水端單體 NB-CIm-4 單體與疏水端單體 NB-Hex，然後將兩者以不同比例進行 ROMP 聚合，製備出 PNBC，之後將此高分子浸泡於磷酸溶液內，得到磷酸化的 PNBC 高分子，模材製備優化中。第二系列為鹼性燃料電池離子交換膜 PSCN 的開發。首先製備疏水端單體 VB-O8 及交聯試劑 DVB-O5，之後利用 RAFT 進行聚合，先聚疏水端單體 VB-O8 及交聯試劑 DVB-O5，再加入4-氯甲基苯乙烯共聚，合成高分子主幹後，最後再加入N-甲基咪唑進行高分子的離子化反應。之後將此高分子浸泡於 KOH 溶液內，得到鹼化的 PS 高分子。為改善薄膜的柔軟度，我們更近一步製備出具長碳鏈之疏水端單體 styrene，並進行此一共聚之優化。目前 PS-C5-NIm-50 在室溫下薄膜導電度最高可達 0.022 S/cm。第三系列為鹼性燃料電池離子交換膜 PNBCN 的開發。首先以新戊基作為離子基團之橋梁，開發出新的親水端單體 BIm 單體，未來能再以 ROMP 進行其聚合，製備出 PNBCN，可將此高分子浸泡於 KOH 溶液內，得到鹼化的 PNBCN 高分子，此一新開發之高分子具較高的離子基團，預期能有較高之 OH- 導電度。第四系列為中溫燃料電池離子交換膜 PBImNB 的開發。將第三系列的新 NB-BIm 單體 (10%) 與 BIm (40%)及具雙溴之烷基 (50%) 共聚，製備出一新的高分子 PBImNB，因高分子具備 NB 單元，此新型高分子可藉由 AIBN 或 ROMP 進行二次的交聯聚合。成膜後可將此高分子浸泡於 KOH 溶液內，先得鹼化的 PBImNB 高分子，然後將其與磷酸進行反應，可得磷酸化之 PBImNB 高分子，可為中溫燃料電池離子交換膜之模材，成膜製程優化中。 ;In this study, three series of hydrophilic monomers for preparation of ionic polymer for ion exchange membranes were developed. In the first series, PNBC for medium temperature fuel cell exchange membrane was developed. First, new monomer NB-CIm-4 and NB-Hex were synthesized, and then the polymer PNBC was prepared via ring-opening metathesis polymerization (ROMP) with different ratio of these two monomers. The phosphoric acid-doped polymer PNBC was prepared by immersing the polymeric film into phosphoric acid solution. The membrane preparation of this new ionic polymer is under optimization. In the second series, ionic polymer PSCN for alkaline fuel cell exchange membrane was developed. First, monomer VB-O8 and cross-linker DVB-O5 were synthesized and then the polymerization was carried out by reversible addition-fragmentation transfer polymerization (RAFT). The hydrophobic VB-O8 and cross-linker DVB-O5 were first polymerized, and then 4-vinylbenzyl chloride was introduced for co-polymerization. The new PS backbone was then imidazolized by methylimidazole to give the final ionic polymer. Then, alkalized PSCN polymer was obtained by immersing the polymeric film into KOH solution. To further improve the film softness, the hydrophobic styrene monomer with a longer branched alkyl chain (b-C8H17). Presently, PSCN-50 film exhibits conductivity up to 0.022 S/cm at room temperature. In the third series, PNBCN for alkaline fuel cell exchange membrane was developed. First, new monomer BIm was synthesized by using neopentyl group as bridge between two imidazole units. Next, the new polymer NB-BIm was developed. Via ring-opening metathesis polymerization (ROMP) with different ratio of these three NB monomers, the new polymer PNBCN was developed. The alkalized PNBCN can be obtained by immersing the obtained polymeric film into KOH solution. The membrane preparation of this new polymer is under optimization. In the fourth series, PBImNB for medium temperature fuel cell exchange membrane was developed. First, the previous series monomer NBIm (10%), BIm(40%) and dibromoalkane (50%) were first polymerized to give the new ionic polymer PBImNB. With the 10% NB unit, the new ionic polymer could be carried out second polymerization by ROMP or RAFT polymerization. The alkalized PBImNB ionic film was obtained by immersing the film into KOH solution. The phosphoric acid doped PBImNB film was obtained by immersing the obtained film into H3PO4 solution. The PBImNB membrane preparation for medium temperature fuel cell exchange membrane is under optimization.
顯示於類別:	[化學研究所] 博碩士論文

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