Mechanochemically synthesized ZIF-8 nanoparticles blended into 6FDA-TrMPD membranes for C3H6/C3H8 separation |
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| Authors: | Yongsheng Liu Hidetoshi Kita Kazuhiro Tanaka Kota Imawaka Shunsuke Tanaka Takahiko Takewaki |
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| Affiliation: | 1. Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, Japan;2. Faculty of Environmental and Urban Engineering, Kansai University, Osaka, Japan;3. Yokohama Research Center, Mitsubishi Chemical Corporation, Yokohama, Japan |
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| Abstract: | The mixed matrix membranes (MMMs) consisting zeolitic-imidazolate framework-8 (ZIF-8) nanoparticles in a polymer have been of considerable interest in separation applications. The fillers used are mostly synthesized using the solvothermal method. In this study, the ZIF-8 nanoparticles were synthesized using a solvent-less and salt-free mechanochemical method and were added to 6FDA-TrMPD polyimide to prepare MMMs. The single gas permeation of C3H6 and C3H8 through the MMMs was investigated. The C3H6 permeability and C3H6/C3H8 ideal selectivity of a 20 wt% mechano-synthesized ZIF-8/6FDA-TrMPD MMM were 70% and 32% higher than those of the neat polymer membrane at 0.1 MPa and 308 K, respectively. The C3H6/C3H8 separation performance of the mechano-synthesized ZIF-8 MMM was similar to that of the conventional solvothermal-synthesized ZIF-8 MMM. This separation performance was in good agreement with the Maxwell model. Temperature and pressure dependence analyses confirmed that the mechano-synthesized ZIF-8 nanoparticles acted as molecular sieves in the MMMs for the C3H6 and C3H8 permeation. |
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| Keywords: | C3H6/C3H8 separation mechano-synthesized ZIF-8 mixed matrix membranes polyimide |
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