規則貫穿孔洞薄膜具有極高產能及分離能力，此類薄膜開發可解決目前薄膜應用在微小粒子分離時產能與分離效能不足的問題，由過去研究得知在固體基材表面單獨使用高分子難以實現製作貫穿規則孔洞的薄膜。本研究利用兩性型dendron作為界面活性劑，兩性型dendron能集中官能基並加強分子間弱鍵結作用力，因此能提升分子的兩性行為，且由於dendron的生長方向，隨著分子量的提高不會造成分子鏈的糾纏，有利於自組裝行為的發生。兩性型dendron與商用級聚醯亞胺(polyimide, PI)進行混摻，利用三氯甲烷作為溶劑，製膜溶液均勻塗佈於濾紙表面，再利用Breath Figures法，在溶劑和水氣的交換過程，使水氣凝結在高分子表面且慢慢沉降，冷凝的水受dendron影響，排列成規則陣列，等溶劑揮發完後，濾紙基材表面塗佈層形成規則貫穿孔洞的薄膜。由SEM觀察，規則貫穿孔洞的高分子薄膜僅在濾紙表面形成，濾紙內纖維之間無Breath Figures孔洞結構，可以簡單地得到上層規則貫穿孔洞，下層為多孔基材的複合薄膜，本研究使用的方法無須將薄膜轉移至基材表面，減少了一道製膜程序。對dendron濃度5mg/ml的鑄膜液所製備複合薄膜進行純水通量和酵母水溶液過濾量測，純水通量高達1.18x105 LMH/bar，酵母水溶液過濾測試通量達1.74x104 LMH/bar，截留率可達92.85%以上，另外進行泥巴水過濾時，也成功將黃色混濁的泥巴水溶液變成乾淨澄清的水。規則貫穿孔洞薄膜亦呈現極佳的antifouling性能。

Regular through-pore membranes have extremely high productivity and separation capabilities. The development of such membranes can solve the current problems of insufficient productivity and separation efficiency in particulate separation. Previous studies have shown that the use of polymer alone on solid substrates surface cannot form the perforated membrane. In this study, amphiphilic dendron is used as surfactant to concentrate functional groups and strengthen the weak bonding force between molecules, which is conducive to form regular and penetrating pores in the membrane. Amphiphlic dendron is mixed with commercial-grade polyimide (PI) with chloroform as the solvent, and then the solution is evenly coated on the surface of the filter paper substrate. Using breath figure method, the exchange process between water and solvent causes the water vapor to condense on the surface of the polymer solution slowly and arranged in a regular array. After the solvent had been evaporated, the coating layer on the surface of the filter paper will form a membrane with regular through-pores. The membrane was observed by SEM and revealed the regular through-pores only formed on the surface of the substrate. The preparation process used in this work eliminates the need of transferring the very thin and weak membrane to the substrate surface, which simplified the membrane-making process. For the composite membrane prepared with a 5mg/ml Dendron solution, pure water flux and yeast solution filtration tests were carried out. A pure water flux of 118826 LMH/bar was obtained, the yeast solution flux and rejection is 17410 LMH/bar and 92.85% respectively. The yellow turbid muddy water was also successfully turned into clear water. The antifouling performance of Regular through-pore membranes is also good.

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