DBS奈米細纖維添加於多孔性高分子疏水薄膜之製備、物性及在薄膜蒸餾上之應用

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Title:	DBS奈米細纖維添加於多孔性高分子疏水薄膜之製備、物性及在薄膜蒸餾上之應用
Other Titles:	The Effect of Dbs Nanofibrils on the Preparation and Characterization of Porous Hydrophobic Membranes and Their Application in Membrane Distillation Process
Authors:	賴偉淇
Contributors:	淡江大學化學工程與材料工程學系
Keywords:	聚偏二氟乙烯;聚丙烯;二苯亞甲基山梨醇;乾/濕混合相轉換法;熱誘導相分離法;薄膜蒸餾
Date:	2011
Issue Date:	2012-05-02 09:34:28 (UTC+8)
Abstract:	本研究主要研發疏水性聚偏二氟乙烯(poly(vinyldiene foluride), PVDF)與聚丙烯(polypropylene, PP)之多孔型薄膜，並希望結合之前研究的經驗與結果，將自組裝(self-assembled)的二苯亞甲基山梨醇(1,3:2,4-dibenzylidene sorbitol, DBS)奈米細纖維應用在疏水性高分子薄膜。首先，將以乾/濕混合相轉換法(dry/wet process)及熱誘導相分離法(thermally induced phase separation method)等二方式分別製備PVDF與PP高分子薄膜，並找出最佳製膜條件。再以最佳製膜條件分別加入不同含量添加劑(DBS)於PVDF及PP高分子成膜系統中，探討加入添加劑(DBS)及利用乙醇除去DBS後，對薄膜孔隙結構、孔洞大小、機械性質與薄膜蒸餾效益的影響，並且利用掃描式電子顯微鏡(SEM) 觀察其孔隙結構，以瞭解胞孔、緻密皮層、顆粒等結構特性與薄膜成型參數的關係。此外亦將使用微差掃描熱卡計(DSC)與X光繞射儀(WAXD)等方法測量薄膜之結晶度、熔點及熔解熱等性質，以瞭解成膜時高分子之結晶行為，並利用萬能拉力試驗機測量，以瞭解其薄膜之抗張強度，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，並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。 In this research, we will investigate the membrane-formation characteristics of porous poly (vinylidene fluoride) (PVDF) and polypropylene (PP) and their applications in membrane distillation processes. Based on results of our previous research, we study the effect of adding self-assembled 1,3:2,4-dibenzylidene sorbitol (DBS) nanofibrils to PVDF and PP membranes. First of all, the dry/wet process and thermally induced phase separation method 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. In addition, we will also compare the differences of the porous membrane structures and mechanical properties by the addition of DBS (with DBS) and washed by ethanol (without DBS). Then, SEM, DSC, and XRD measurements 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 for commercial use.
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Research Paper

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