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首页> 外文期刊>ACS applied materials & interfaces >Enhanced Interfacial Interaction and CO2 Separation Performance of Mixed Matrix Membrane by Incorporating PolyethylenimineDecorated Metal-Organic Frameworks
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Enhanced Interfacial Interaction and CO2 Separation Performance of Mixed Matrix Membrane by Incorporating PolyethylenimineDecorated Metal-Organic Frameworks

机译：引入聚乙烯亚胺修饰的金属-有机骨架，增强混合基质膜的界面相互作用和CO2分离性能

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Polyethylenimine (PEI) was immobilized by MIL-101(Cr) (similar to 550 nm) via a facile vacuum-assisted method, and the obtained PEI@MIL-101(Cr) was then incorporated into sulfonated poly(ether ether ketone) (SPEEK) to fabricate mixed matrix membranes (MMMs). High loading and uniform dispersion of PEI in MIL-101(Cr) were achieved as demonstrated by ICP, FT-IR, XPS, and EDS-mapping. The PEI both in the pore channels and on the surface of MIL-101(Cr) improved the fillerpolymer interface compatibility due to the electrostatic interaction and hydrogen bond between sulfonic acid group and PEI, and simultaneously rendered abundant amine carriers to facilitate the transport of CO2 through reversible reaction. MMMs were evaluated in terms of gas separation performance, thermal stability, and mechanical property. The as-prepared SPEEK/PEI@MIL-101(Cr) MMMs showed increased gas permeability and selectivity, and the highest ideal selectivities for CO2/CH4 and CO2/N-2 were 71.8 and 80.0 (at a CO2 permeability of 2490 Barrer), respectively. Compared with the membranes doped with unfilled MIL-101(Cr), the ideal selectivities of CO2/CH4 and CO2/N-2 for PEI@MIL-101(Cr)-doped membranes were increased by 128.1 and 102.4%, respectively, at 40 wt % filler loading, surpassing the 2008 Robeson upper bound line. Moreover, the mechanical property and thermal stability of SPEEK/PEI@MIL-101(Cr) were enhanced.
机译：通过简便的真空辅助方法将MIL-101（Cr）（类似于550 nm）固定化聚乙烯亚胺（PEI），然后将获得的PEI @ MIL-101（Cr）掺入磺化聚醚醚酮（ SPEEK）以制造混合基质膜（MMM）。通过ICP，FT-IR，XPS和EDS映射证明，PEI在MIL-101（Cr）中具有高负载量和均匀分散性。由于磺酸基团和PEI之间的静电相互作用和氢键，MIL-101（Cr）的孔道和表面的PEI均改善了填料聚合物界面的相容性，并同时提供了丰富的胺载体以促进CO2的运输通过可逆反应。根据气体分离性能，热稳定性和机械性能对MMM进行了评估。所制备的SPEEK / PEI @ MIL-101（Cr）MMMs显示出更高的气体渗透性和选择性，并且CO2 / CH4和CO2 / N-2的最高理想选择性为71.8和80.0（在2490 Barrer的CO2渗透率下） ， 分别。与未填充的MIL-101（Cr）掺杂的膜相比，PEI @ MIL-101（Cr）掺杂的膜的理想CO2 / CH4和CO2 / N-2选择性分别提高了128.1％和102.4％。 40％的填料装载量，超过了2008年Robeson上限。此外，还提高了SPEEK / PEI @ MIL-101（Cr）的机械性能和热稳定性。

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