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Mixed-Matrix Membrane Hollow Fibers of Cu 3 (BTC) 2 MOF and Polyimide for Gas Separation and Adsorption

2010; American Chemical Society; Volume: 49; Issue: 24 Linguagem: Inglês

10.1021/ie1014958

1520-5045

Jun Hu, Hongpei Cai, Huiqing Ren, Yongming Wei, Zhengliang Xu, Honglai Liu, Ying Hu,

Covalent Organic Framework Applications

Metal−organic framework (MOF) crystals of Cu3(BTC)2 with a high surface area (1396 m2·g−1) were synthesized and mixed with polyimide (PI) to prepare mixed-matrix membranes (MMMs) for gas separations. The PI−Cu3(BTC)2 blend was successfully spun into MMM hollow fiber by the dry/wet-spinning method. SEM images of the fiber cross sections revealed significant plastic deformation of the polymer matrix owing to the strong affinity between Cu3(BTC)2 and PI. The H2 permeance and the selectivity of H2 with respect to other gases such as N2, CO2, O2, and CH4 both increased markedly with increased Cu3(BTC)2 loading. At a loading of 6 wt % Cu3(BTC)2, the permeance of H2 increased by 45%, and the ideal selectivity increased by a factor of 2−3 compared to the corresponding values for pure PI.