高濃度均勻混摻沸⽯咪唑酯⾻架- 8奈米粒⼦之新穎高效有機無機複合薄膜在乙醇/⽔滲透蒸發上的應⽤

A Novel and Efficient Mixed Matrix Membrane (MMM) for Pervaporation of Ethanol/Water Mixtures owing to High and Homogeneous Loading of Zeolitic Imidazolate Frameworks-8 (ZIF-8) Nanoparticles

鄧有衡(Yu-Heng Deng)

指導教授 ： 吳嘉文

國立臺灣大學/工學院/化學工程學研究所/碩士(2015年)

https://doi.org/10.6342/NTU.2015.02051

摘要

為了克服有機無機複合薄膜製備上產生的兩大問題：無機粒子與有機相間相分離的現象和高混摻無機粒子下的不良表現性，我們成功利用水相合成的ZIF-8奈米粒子混摻PVA高分子，製備出新穎且有效的有機無機複合薄膜。此製備過程無須將ZIF-8粒子乾燥，合成出的粒子直接加入高分子中形成PVA/ZIF-8 有機無機複合薄膜。添加ZIF-8奈米粒子增加了薄膜在滲透蒸發上乙醇除水的通量和分離因數，若進一步用戊二醛交聯高分子，此表現性可再被改善。結果顯示薄膜經交聯後，在滲透蒸發上乙醇除水的表現性大幅增加。ZIF-8混摻量在39%時有最好的通量和分離因數，分別為0.486 kg/m2h 和4725。此外，穿透性（permeability）為原膜的三倍，分離因數則為原膜的九倍。此優異的表現性亦可歸因於ZIF-8奈米粒子的分子篩效應。

關鍵字

滲透蒸發 ； 沸⽯咪唑酯骨架 ； 聚乙烯醇 ； 有機無機複合薄膜 ； 交聯劑

並列摘要

To overcome the problems of phase separation between polymer and fillers and low separation performance of a membrane at high filler loading, we have synthesized a novel and efficient mixed matrix membrane (MMM) by incorporating water-based synthesis of ZIF-8 nanoparticles into polyvinyl alcohol (PVA) membranes. The ZIF-8 nanoparticles without drying is preferred for the fabrication of PVA/ZFI-8 MMMs. The incorporation of ZIF-8 nanoparticles does increase both of the flux and separation factor of a PVA membrane. However, both of the pervaporation performances of PVA/ZIF-8 MMMs could be further improved by crosslinking with glutaraldehyde (GA). The result shows that PVA/ZIF-8 MMMs with GA have superb performances on pervaporation separation of ethanol dehydration. The best flux and separation factor of PVA/ZIF-8 MMMs with GA are 0.486 kg/m2h and 4725 respectively when the doped amount of ZIF-8 nanoparticles is 39.0 wt%. The permeability is three times as much as that of pristine PVA with GA crosslinked and the separation factor is nearly 9 times as much as that of the pristine PVA with GA crosslinked.

並列關鍵字

pervaporation ； ZIF-8 ； PVA ； MMMs ； crosslinker

參考文獻

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