本研究主要研發聚偏二氟乙烯(PVDF)及聚丙烯(PP)之多孔型薄膜，以提供其他子計畫在薄膜蒸餾程序研究之所需。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)及聚丙烯(PP)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；另一方面，也利用導入添加劑(黏土或無機鹽類)於PVDF與PP成膜系統中的方式，造成分相行為的變化，來製備不同孔隙結構之高分子薄膜。其次，以SEM、DSC、XRD、Contact Angle等來作膜材物性與結構分析，找出成膜條件與薄膜物性的關係，希望對成膜機構有所瞭解。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。 表 In this research, we will focus on the investigations of porous poly(vinylidene fluoride) (PVDF) and polypropylene (PP) membranes formation, and their applications in membrane distillation processes. First of all, both immersion-precipitation and thermally induced phase separation methods will be employed to prepare PVDF and PP 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. On the other hand, we will also change the porous membrane structures by the addition of clay or inorganic salt. Then, SEM, DSC, XRD, and Contact Angle measurement will be used to characterize the formed membranes. 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.
