含四嗪之鋯金屬有機骨架與應用於噴灑式粉體以製備油水分離薄膜之研究
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2022
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本論文主要使用金屬有機骨架(Metal Organic Framework,MOF)與疏水材料複合進行油水分離相關的研究。論文第一部分首先強調在於ZrT z-68與配位基H2TZDB的合成，會選擇Zr-MOF的主要原因是它具有工業應用所需的韌性，分解溫度高於500°C，並且耐大多數的化學品，是符合應用於工業用途的標準。但是ZrTz-68隸屬於UiO-68的一環，有著合成與活化時間長的缺點，本篇會利用雙溶劑置換與加熱抽真空來完成快速合成以克服這項問題。論文的第二部分會談到用於油水分離的薄膜如何製備與其中MOF所帶來的效益與原理。膜過濾是分離油水的重要技術。過去，通常添加不同的顆粒來改變膜的表面形貌，以改變膜的潤濕性，調節分離效率。本研究以主要以中孔為主的多孔ZrTz-68 MOF為添加劑，形成用於油水分離的Graphene@ZrTz-68複合膜。 ZrTz-68 MOF中的四嗪與石墨烯中的雙鍵之間直接進行簡單的點擊反應生成了複合膜。負載ZrTz-68 MOF修飾了薄膜的表面形貌。由於高度多孔的 ZrTz-68 帶來的高截留空氣分數，使得液氣接觸面大大提升、液固接觸面減少，促使薄膜下疏液性的空氣幫助大大提高了複合材料的整體疏水性。本案例中的新策略開闢了用於油水分離之薄膜製備的前景，附載上去的ZrTz-68不在像以往只是純粹的摻雜，而是以共價鍵固定上去的形式使得效能更佳的穩定：不只環保、操作簡單，更重要的是，高分離效率之外還擁有前所未有的高通量。
Membrane filtration is an important technology for separating oil and water. In the past, different particles were usually added to change the surface morphology of the membrane to enhance the wettability of the membrane and adjust the separation efficiency. In this study, a porous ZrTz-68 (UiO-68 type) MOF was used as the additive and form Graphene@ZrTz-68 composite membrane for oil/water separation. The facile and direct click reaction between the tetrazine in ZrTz-68 MOF and the double bond in the graphene generate the composite membrane. The surface morphology modified by the loading of ZrTz-68 MOF. The overall hydrophobicity of the composite is greatly improved due to the high trapped air fraction brought by the highly porous ZrTz-68. The new ZrTz-68@Graphene composite membrane displays high separation performance and recovery rate compared with the membranes published in the literatures. The new strategy in this case opens up the prospect of membrane preparation that being environmentally friendly and simpler, and more importantly, high separation efficiency and the unbelievable high flux throughput never seen before.
Membrane filtration is an important technology for separating oil and water. In the past, different particles were usually added to change the surface morphology of the membrane to enhance the wettability of the membrane and adjust the separation efficiency. In this study, a porous ZrTz-68 (UiO-68 type) MOF was used as the additive and form Graphene@ZrTz-68 composite membrane for oil/water separation. The facile and direct click reaction between the tetrazine in ZrTz-68 MOF and the double bond in the graphene generate the composite membrane. The surface morphology modified by the loading of ZrTz-68 MOF. The overall hydrophobicity of the composite is greatly improved due to the high trapped air fraction brought by the highly porous ZrTz-68. The new ZrTz-68@Graphene composite membrane displays high separation performance and recovery rate compared with the membranes published in the literatures. The new strategy in this case opens up the prospect of membrane preparation that being environmentally friendly and simpler, and more importantly, high separation efficiency and the unbelievable high flux throughput never seen before.
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金屬有機框架, 油水分離, 薄膜, metal-orgnic framework, emulsion, membrane