用于有机溶剂分离的含铜（I/II）金属有机框架的纳滤膜

Cu(I/II) Metal-Organic Frameworks Incorporated Nanofiltration Membranes for Organic Solvent Separation.

作者信息

Upadhyaya Lakshmeesha, Chiao Yu-Hsuan, Wickramasinghe S Ranil, Qian Xianghong

机构信息

Department of Biomedical Engineering, University of Arkansas, Fayetteville, AR 72701, USA.

King Abdullah University of Science and Technology (KAUST), Biological and Environmental Science and Engineering Division (BESE), Advanced Membranes and Porous Materials Center (AMPM), Thuwal 23955-6900, Saudi Arabia.

出版信息

Membranes (Basel). 2020 Oct 29;10(11):313. doi: 10.3390/membranes10110313.

DOI:10.3390/membranes10110313

PMID:33138087

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7692870/

Abstract

Copper-based metal-organic frameworks (MOFs) with different oxidation states and near-uniform particle sizes have been successfully synthesized. Mixed-matrix polyimide membranes incorporating 0.1-7 wt% of Cu(II) benzene-1,2,5-tricarboxylic acid (Cu(II)BTC), Cu(I/II)BTC and Cu(I) 1,2-ethanedisulfonic acid (EDS) (Cu(I)EDS) MOFs were fabricated via non-solvent-induced phase inversion process. These membranes are found to be solvent resistant and mechanically stable. Liquid phase nanofiltration experiments were performed to separate toluene from n-heptane at room temperature. These membranes demonstrate preferential adsorption and permeation of the aromatic toluene over aliphatic n-heptane. The amount of MOF particles incorporated, the oxidation state of the Cu ion and membrane, and barrier layer thickness have a significant impact on the separation factor. Toluene/heptane separation factor at 1.47, 1.67 and 1.79 can be obtained for membranes incorporating 7 wt% Cu(II)BTC, Cu(I/II)BTC and Cu(I)EDS respectively at room temperature.

摘要

已成功合成出具有不同氧化态和近乎均匀粒径的铜基金属有机框架材料（MOF）。通过非溶剂诱导相转化过程制备了包含0.1 - 7 wt%的Cu(II)苯-1,2,5-三羧酸（Cu(II)BTC）、Cu(I/II)BTC和Cu(I) 1,2-乙二磺酸（EDS）（Cu(I)EDS）MOF的混合基质聚酰亚胺膜。发现这些膜具有耐溶剂性和机械稳定性。在室温下进行了液相纳滤实验以分离甲苯和正庚烷。这些膜表现出对芳香族甲苯相对于脂肪族正庚烷的优先吸附和渗透。掺入的MOF颗粒数量、Cu离子和膜的氧化态以及阻挡层厚度对分离因子有显著影响。在室温下，分别掺入7 wt% Cu(II)BTC、Cu(I/II)BTC和Cu(I)EDS的膜的甲苯/庚烷分离因子可达到1.47、1.67和1.79。