近年來工業發展快速，導致大量含油廢水進入環境對生態產生嚴重威脅，因此薄膜油水分離技術日漸受到重視。本研究以濾紙為基材，使用三氯甲烷作為溶劑將兩性型樹枝狀高分子與聚醯亞胺(polyimide, PI)進行混摻形成鑄膜液，鑄膜液以液滴塗佈法(Drop Casting method)均勻塗佈於濾紙表面，再藉由Breath -Figure法在濾紙基材表面形成規則貫穿孔洞薄膜。薄膜表面上的azetidine-2,4-dione會與帶有一級胺官能基的化合物反應開環，藉由此反應可將聚乙烯亞胺(polyethyleneimine, PEI)接枝於薄膜表面，胺基被用於調控規則貫穿孔洞薄膜表面的親水性，規則貫穿孔洞薄膜表面的接枝程度會隨PEI的分子量及反應時間變化而改變進而形成不同親水性的薄膜，規則貫穿孔洞薄膜呈現優異的水包油乳化液分離效能。在PEI 10000改質時間6 hr的最佳條件下，改質後的均一貫穿孔洞膜具有親水性及水下超疏油特性，藉由其表面親水性，以抽氣過濾的方式分離水包油乳化液，乳化液通量可達49518.4 LMH/bar，截流率可達99.1%。

In recent years, industrial development has produced huge amount oil containing waste water so the oil-water separation has received more attention. In this work, commercial polyimide/amphiphilic dendron dissolved in chloroform as the casting solution to form regular through-pore layer on the surface of filter paper via Breath- figure method. Amine compounds with varied molecular weight graft on the dendron to control the hydrophilicity of the membrane. Azetidine-2,4-dione on the surface reacts with a compound with primary amine functional group with open ring reaction, and this reaction allows the grafting polyethyleneimine (polyethyleneimine, PEI) to the membrane. The molecular weight of PEI and the modified reaction time are related with the hydrophilicity. The optimal modification condition is PEI 10000 and 6 h reaction time. The modified membrane shown hydrophilicity and underwater super-oleophobic properties. Using the vacuum filtration to separate the oil in water emulsion, the flux can reach 49518.41 LMH/bar, and the rejection can reach 99.14%.

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