Hydrophobic-functionalized ZIF-8 nanoparticles incorporated PDMS membranes for high-selective separation of propane/nitrogen

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• 作者：Jianwei Yuan ; Qianqian Li ; Jie Shen ; Kang Huang ; Gongping Liu ; Jing Zhao ; Jingui Duan and Wanqin Jin
• 刊名：Asia-Pacific Journal of Chemical Engineering
• 出版年：2017
• 出版时间：January/February 2017
• 年：2017
• 卷：12
• 期：1
• 页码：110-120
• 全文大小：633K
• ISSN：1932-2143

文摘

It is still a great challenge to prepare high performance mixed matrix membranes (MMMs) because of the difficulty in finely tuning the compatibility between filler and organic phases. In this work, ZIF-8 nanoparticles hydrophobically functionalized by 5, 6-dimethylbenzimidazole (DMBIM) via shell ligand exchange (SLE) reaction were incorporated into polydimethylsiloxane (PDMS) matrix to fabricate defect-free MMMs. Organic-–inorganic interface compatibility was realized because of more abundant organic ligands from DMBIM. The effects of different loadings on membrane microstructure and gas separation performance were investigated systematically. A significantly enhanced C₃H₈/N₂ separation performance with C₃H₈ permeability over 2.10 × 10⁴ Barrer (91 % higher than that of pure PDMS membrane) and C₃H₈/N₂ selectivity of 99.5 (116 % higher than that of pure PDMS membrane) were achieved. Additionally, the as-prepared membrane also exhibited excellent stability during long term operation.