聚偏氟乙烯
膜
热稳定性
化学工程
材料科学
成核
化学稳定性
金属有机骨架
氟化物
复合数
纳米复合材料
高分子化学
化学
无机化学
有机化学
复合材料
吸附
工程类
生物化学
作者
Wanbin Li,Qin Meng,Congyang Zhang,Guoliang Zhang
标识
DOI:10.1002/chem.201500007
摘要
Abstract Herein we report a new ammoniation‐based chemical modification strategy for synthesis of continuous and uniform metal–organic framework (MOF)/polyvinylidene fluoride (PVDF) membranes with attractive performance. Ammoniation can promote the support PVDF membrane to produce amino groups, form a nanoparticle structure, and be well cross‐linked; therefore, the high‐density heterogeneous nucleation sites for MOFs growth were provided and the thermal stability and chemical resistance of composite membranes can be greatly improved. The high‐quality layers of representative Cu‐BTC and ZIF‐8 were synthesized on the chemically modified PVDF membranes. By ammoniation, ZIF‐7 can even be grown under harsh synthetic conditions such as in DMF precursor solutions at 403 K. The fabricated MOF/PVDF composite membranes with excellent hollow fiber structures and enhanced structural stability exhibited high H 2 permselectivities for H 2 /CO 2 and H 2 /N 2 .
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