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研究生： 潘俞臻
Yu-Zhen Pan
論文名稱： thiol-ene反應製備之交聯聚苯并咪唑陰離子交換膜與其性質探討
Fabrication of Crosslinked Polybenzimidazole-based Anion exchange membranes via thiol-ene reaction and Properties characterization
指導教授： 陳志堅
Jyh-Chien Chen
口試委員: 王英靖
Ying-Jing Wang
游進陽
Chin-Yang Yu
學位類別： 碩士
Master
系所名稱： 工程學院 - 材料科學與工程系
Department of Materials Science and Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 中文
論文頁數： 63
中文關鍵詞： 聚苯并咪唑 、thiol-ene反應 、陰離子交換膜
外文關鍵詞： polybenzimidazole, thiol-ene reaction, anion exchange membrane
相關次數： 點閱：319  下載：1 
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  •  上一筆

    • 陰離子交換膜（AEM）作為陰離子交換膜燃料電池（AEMFC）的核心成分，人們期望它具有高離子電導率，低溶脹率，良好的機械和熱穩定性。本研究將自行合成mPBI，經過強路易士鹼KOH將PBI之咪唑去質子化，接著以具有陽離子的(5-bromopentyl)trimethylammonium bromide藉由改變劑量比調控PBI的接枝，獲得具有不同IEC之高分子。接著接枝具有乙烯基的allyl bromide後，再將高分子以1,3-propanedithiol作為交聯劑，最後在製備薄膜時一併進行thiol-ene反應，成功以溶液澆鑄法塗佈成可饒式的交聯薄膜xQyPr。xQyPr在250 oC之前皆沒有明顯的重量損失，顯示有良好的熱穩定性。尺寸安定性在室溫下之吸水率介於15.5至49.3 %，溶脹程度介於6.8至22.5%，且交聯程度皆在93%以上，顯示出交聯能有效地提升薄膜的尺寸安定性。而機械性質的部分，xQyPr之乾膜(cl- form)拉伸強度為24.56到31.50MPa，濕膜(OH- form)拉伸強度為14.00到20.50MPa之間，顯示出良好的機械性質。將1.6Q0.3Pr進行陰離子傳導率的測試，在60 oC下可達49.14 mS/cm，在80 oC下可達61.06 mS/cm。

    As the core component in anion exchange membrane fuel cell (AEMFC), anion exchange membranes (AEM) have been expected to possess high ionic conductivity, low swelling, excellent mechanical and thermal stabilities.
    In this study, mPBI, grafted with cationic long carbon chains was synthesized, and different IEC polymers were obtained by controling the PBI grafted with different dose ratio. Then the side group with vinyl group was grafted and the thiol-ene reaction was carried out at the same time when the film was prepared. The xQyPr. film was successfully coated by solution casting method.
    Then, the long side-chain (5-bromopentyl) trimethylammonium bromide) was grafted onto the mPBI with different IECs by controling the dose ratio. Then, the allyl bromide with vinyl group was grafted, and then the polymer was crosslinked with 1,3-propanedithiol. Finally, the thiol-ene reaction was carried out during the preparation of the film, and the xQyPr film was successfully coated by solution casting method. xQyPr no weight loss was detected before 250 oC and showed good thermal stability. The water uptake at room temperature ranged from 15.5 to 49.3%, the swelling degree ranged from 6.8 to 22.5%, and the crosslinking degree was above 93%, indicating that the cross-linking can effectively improve the dimensional stability of the films. In the mechanical propertie part, the tensile strength of the dry film (cl- form) is 24.56 to 31.50 MPa, and the tensile strength of the wet film (OH- form) is 14 and 20.50 MPa, showing a good mechanical property. The hydroxide ion conductivity of 1.6Q0.3Pr at 60 oC was 49.14 mS/cm, and was 61.06 mS/cm at 80 oC.

    中文摘要 1 Abstract 2 目錄 3 Figure 索引 5 Table 索引 7 Scheme 索引 8 第一章 緒論 10 1.1前言 10 1.2 燃料電池類型 11 1.3 AEMFC之發電原理與構造 12 1.4 質子交換膜之介紹 15 1.5 陰離子交換膜之介紹 17 1.6 聚苯并咪唑之介紹 19 1.6.1聚苯并咪唑之改質 21 1.6.2 聚苯并咪唑在燃料電池之應用 24 1.6.3 鹼性安定性與降解機制 27 1.7 交聯 35 1.8 研究目的與動機 39 第二章 實驗部分 40 2.1 實驗藥品 40 2.2 實驗儀器 41 2.3 mPBI之合成 42 2.4 高分子改質 43 2.5 薄膜製作 44 第三章 結果與討論 45 3.1 合成與性質表徵 45 3.2 熱性質 48 3.3 IEC、尺寸安定性與交聯程度 49 3.4 機械性質 51 3.5 陰離子傳導率 52 第四章 結論 55 參考文獻 56

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