Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2017.06.011
Title: Ultrathin mixed matrix membranes containing two-dimensional metal-organic framework nanosheets for efficient CO2/CH4 separation
Authors: Cheng, Youdong 
Wang, Xuerui 
Jia, Chuankun 
Wang, Yuxiang 
Zhai, Linzhi
Wang, Qing 
Zhao, Dan 
Keywords: Science & Technology
Technology
Physical Sciences
Engineering, Chemical
Polymer Science
Engineering
Mixed matrix membranes
Metal-organic frameworks
Two dimensional fillers
Spin coating
CO2/CH4 separation
INTRINSIC MICROPOROSITY PIM-1
GAS PERMEATION PARAMETERS
GRAPHENE OXIDE MEMBRANES
CO2 CAPTURE
POLYIMIDE MEMBRANES
BLEND MEMBRANES
POLYMER
PERFORMANCE
TRANSPORT
FILLERS
Issue Date: 1-Oct-2017
Publisher: ELSEVIER SCIENCE BV
Citation: Cheng, Youdong, Wang, Xuerui, Jia, Chuankun, Wang, Yuxiang, Zhai, Linzhi, Wang, Qing, Zhao, Dan (2017-10-01). Ultrathin mixed matrix membranes containing two-dimensional metal-organic framework nanosheets for efficient CO2/CH4 separation. JOURNAL OF MEMBRANE SCIENCE 539 : 213-223. ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2017.06.011
Abstract: © 2017 Elsevier B.V. Ultrathin mixed matrix membranes (MMMs) containing two-dimensional (2D) fillers are highly sought recently due to their good performance in gas separations. Here we report the preparation of PIM-1 based ultrathin MMMs containing 2D metal-organic framework (MOF) nanosheets using spin coating method. The lamellar structure of the 2D layered MOF filler (copper 1,4-benzenedicarboxylate nanosheets, CuBDC-ns) enlarges the contacting area between fillers and the polymer matrix, leading to the formation of dense MMMs. The centrifugal force generated during the spin coating process helps to horizontally align these CuBDC-ns, increasing the gas diffusion resistance across the membrane. The influence of membrane thickness and filler content on the separation performance of CO2/CH4 mixture is examined and discussed. Optimizing membrane thickness and filler content results in a 660 nm thick ultrathin MMM comprising 10 wt% CuBDC-ns, which exhibits a CO2/CH4 selectivity of 15.6 and CO2 permeance as high as 407 GPU, surpassing other PIM-1 based membranes. Besides, the long term stability test shows that the prepared ultrathin MMMs are stable up to 100 h. These results demonstrate that the ultrathin MMMs reported in this study are excellent candidates for CO2/CH4 separation, with potential applications in natural gas purification and biogas upgrading.
Source Title: JOURNAL OF MEMBRANE SCIENCE
URI: https://scholarbank.nus.edu.sg/handle/10635/170188
ISSN: 03767388
18733123
DOI: 10.1016/j.memsci.2017.06.011
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