本研究主要探討聚偏二氟乙烯(PVDF)及聚醯胺(Nylon)多孔型薄膜之製備及其在微過濾與薄膜蒸餾程序的應用。首先利用浸漬沈澱法及熱誘導相分離法製備聚偏二氟乙烯(PVDF)及聚醯胺(Nylon)薄膜，探討以此二法製備薄膜時影響薄膜孔隙結構之參數，並製作出一系列不同孔隙結構之薄膜，以SEM、DSC、XRD、Contact Angle等來作膜材物性分析。其次，將其應用於微過濾之實驗，以瞭解薄膜之孔隙結構、孔洞大小及親疏水性對微粒的截留效益有何影響。最後亦將所製備之薄膜應用於直接接觸式薄膜蒸餾實驗，探討孔隙結構及孔洞大小的效應。期望藉此開發出具有商業化價值的薄膜材料。 In this research, we will focus on the investigations of porous poly(vinylidene fluoride) (PVDF) and nylon membranes formation, and their applications in micro-filtration and membrane distillation processes. First of all, both immersion-precipitation and thermally induced phase separation methods will be employed to prepare PVDF and nylon membranes. The preparation parameters that affect the porous structures of the membranes will be studied, and a series of membranes with different porous structures will be produced. SEM, DSC, XRD, and Contact Angle measurement will be used to characterize the formed membranes. Then, the membranes will be applied to micro-filtration operations to understand the effects of porous structure, pore size, and hydrophilicity/ hydrophobicity on the filtration performance. Finally, membranes will also be employed in direct-contact membrane distillation experiments to see the effects of porous structure and pore size on the efficiency of this separation process. It is hoped that this research will provide useful results for the development of porous membranes of commercial value.
