電紡奈米聚碸纖維/聚苯咪唑複合膜製備及性質研究

Fabrication And Characterization of Polybenzimidazole /Polysulfone Nanofiber by Electrospinning Composite Membranes

何恭毅(Kung-Yi Ho)

指導教授 ： 余子隆

元智大學/工程學院/化學工程與材料科學學系/碩士(2007年)

摘要

電紡技術為目前製備奈米纖維最為普遍的製程。本論文將聚碸(polysulfone，PSU)/DMAc溶液利用電紡技術（Electrospinning）抽絲成膜，再將電紡後PSU/DMAc薄膜磺酸化，製作不同磺酸化比例之電紡纖維膜，以磺酸化電紡纖維膜為基材，浸漬聚苯咪唑(polybenzimidazole，PBI)/DMAc/LiCl溶液製作複合膜，接著製作膜電極組(MEA)及質子交換膜燃料電池(PEMFC)高溫測試，但發現OCV約0.35，電流密度也偏低，由SEM發現膜材充滿孔洞。經過改進方法之s-PSU/PBI複合膜由SEM觀察其表面與截面，發現已成功解決複合膜孔洞之問題。利用改進方法之s-PSU/PBI複合膜製作MEA測試其單電池效能，發現OCV成功提高至0.7 V，但是電流密度仍然偏低。其原因可能為s-PSU/PBI 複合膜中PBI含量偏低所致。未來將控制s-PSU/PBI重量比及膜厚來提升電流密度。

關鍵字

聚苯咪唑(polybenzimidazole，PBI)、聚砜(Polysulfone,PSU)磺酸化、電紡（Electrospinning）

並列摘要

The electrospinning is a straightforward method to produce polymer fibers from polymer solutions with diameters in the range from nano- to micro- scale. In this study ,We fabricated polysulfone nanofiber membranes from polysulfone/N,N’-dimethyl acetamide solutions by electrospinning , then sulfonated polysulfone nanofiber membranes by sulfuric acid , so We get different degree of sulfonation polysulfone nanofiber membranes.Finally we fabrication PSU / PBI composite membrane and test the performance in high temperature. We find the result OCV is about 0.35 V and have lower current density. From SEM, many holes were observed in the membrane surface.We use new method to improve it, then OCV increases to 0.7 V, but still have lower current density. The reason maybe is the PBI weight ratio too low in PSU electrospum nanofiber / PBI composite membrane to cause.We will control the PSU electrospum nanofiber / PBI weight ratio to increase performance in the future.

並列關鍵字

polybenzimidazole(PBI)、Polysulfone(PSU)、Electrospinning

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