Aligned Metal–Organic Framework Nanoplates in Mixed‐Matrix Membranes for Highly Selective CO ₂ /CH ₄ Separation

2D metal–organic frameworks are attractive filler in mixed matrix membranes (MMMs) due to the high aspect ratio and contact opportunity at filler–polymer interface. However, their alignment polymer remains a challenge fully play functions. Herein, our best knowledge, for first time, facile synthesis of KAUST-7-NH2 (KAUST, King University Science Technology) nanoplate is reported with 1D channels an greater than 30. The nanoplates incorporated aligned 4,4′-(hexafluoroisopropylidene) diphthalic anhydride-2,4-diaminomesitylene (6FDA-DAM) under shear force loading up 50 wt%. large difference adsorption abilities between CO2 CH4 from (001)-oriented nanoplate-based MMMs favorable interaction interface contribute excellent CO2/CH4 separation performance. resultant show selectivity 66.2% enhancement (surpassed 2008 Robeson upper bound), antiplasticization 17 bar, long-term stability 240 h indicating its good potential natural gas treatment.