電場誘導磺酸聚氟碳化物薄膜的物理形態

Morphology of PFSA Membranes after Induced by Electric Field

韓方興(Fang-Hsing Han)

指導教授 ： 林秀麗

元智大學/工程學院/化學工程與材料科學學系/碩士(2005年)

摘要

本研究主要是將目前使用於燃料電池最普遍的全氟磺酸樹脂，與不同溶劑混合後，再於溫度介於樹脂的Tg及其結晶融點Tm之間揮發溶劑成膜，經過不同時間及方向的外加電場誘導後，來探討其物理性質，研究所得數據可供我們做為進一步製作燃料電池薄膜的參考。經電場與未經電場誘導之薄膜主要差異在於有無使薄膜內部微結構規則排列。由實驗數據顯示，與電極板平行之膜材，其導電度與甲醇滲透率均較與電極板垂直之膜材來得高一些；而由TEM則可看出膜材經電場誘導後之內部奈米結構排列情形。此外，由AFM觀測圖可看出，不論膜材如何放置於電場或無電場中加熱，其表面皆會隨時間的增加而縮短其排列。

關鍵字

全氟磺酸樹脂；電場；燃料電池

並列摘要

Nafion membrane is the most general membrane used in fuel cell at present. In this study, the Nafion membranes were prepared by Nafion-DMAc solution. The membranes were then annealed at 120℃ in an electric field. The conductivity, methanol crossover, and micro-structure morphology of Nafion-117 (obtained from Du Pont) and the membranes prepared in our lab, which were annealed at 120℃ in an electric field, were reported. The main difference between membranes annealing with and without an electric field is the micro-structure has regularity or not. From the experimental data we found that the conductivity and the methanol permeation of membranes parallel to the electrode are more larger than the membrane perpendicular to the electrode.

並列關鍵字

Nafion；Electric field；Fuel cell