PBI/PTFE 及PBI/PBI-BS/PTFE複合膜的製備及性能研究

Preparations and Performance Studies of PBI/PTFE andPBI/PBI-BS/PTFE Composite Membranes

謝依珊(Yi-Shan Hsieh)

指導教授 ： 林秀麗

共同指導教授 ： 余子隆(Tzyy-Lung Yu)

元智大學/工程學院/化學工程與材料科學學系/碩士(2009年)

摘要

本論文合成Polybenzimidazole (PBI)及PBI衍生物Butyl sulfonated Polybutylimidazole (PBI-BS)。利用具有微孔洞的Poly tetra fluoro ethylene (PTFE)膜為支撐物，補強PBI及PBI/PBI-BS (8/2 g/g)摻合物，製備PBI/PTFE複合膜及PBI/PBI-BS/PTFE複合膜。我們利用SEM (Scanning Electron Microscope)觀察膜材表面以及截面的結構、TGA (Thermogravimetric analysis)分析膜材熱穩定性。並將PBI/PTFE及PBI/PBI-BS/PTFE此兩種複合膜材製作成膜電極組 (MEA)，分別在160 ℃及定電流i = 200 mA/cm2進行H2/O2單電池的400小時及100小時的長時間測試。在長時間的操作過程中，每12小時分別測定單電池的i-V曲線及以AC-impedance來測試膜材和觸媒的阻抗值。最後以FE-SEM觀察長時間操作實驗前及實驗後MEA之形態差異。

關鍵字

PBI/PTFE複合膜 ； PBI/PBI-BS/PTFE複合膜 ； 長時間測試

並列摘要

In this study, we synthesized polybenzimidazole (PBI) and its derivative butyl sulfonated polybenzimidazle (PBI-BS).The porous poly tetra fluoro ethylene (PTFE) was used as supporting membranes to reinforce PBI and PBI/PBI-BS (8/2 g/g) blend to prepare PBI/PTFE and PBI/PBI-BS/PTFE composite membranes. These two composite membranes were used to prepare membrane electrode assemblies (MEA). We performed 400 hr H2/O2 life test on PBI/PTFE MEA and 100 hr test on PBI/PBI-BS/PTFE MEA at 160 ℃ with a current density
i = 200 mA/cm2. During long time life test, the i-V curve and AC-impedance measurements of MEAs were performed every 12 hr.

並列關鍵字

PBI/PTFE composite membrane ； PBI/PBI-BS/PTFE ； Composite membranes

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