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Interactive Thermal Effects on Metal-Organic Framework Polymer Composite Membranes

机译:金属有机骨架聚合物复合膜的相互作用热效应

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摘要

Polymeric membranes are important tools for intensifying separation processes in chemical industries, concerning strategic tasks such as CO2 sequestration, H-2 production, and water supply and disposal. Mixed-matrix and supported membranes have been widely developed; recently many of them have been based on metal-organic frameworks (MOFs). However, most of the impacts MOFs have within the polymer matrix have yet to be determined. The effects related to thermal behavior arising from the combination of MOF ZIF-8 and polysulfone have now been quantified. The catalyzed oxidation of the polymer is strongly affected by the MOF crystal size and distribution inside the membrane. A 16 wt% 140 nm-sized ZIF-8 loading causes a 40% decrease in the observed activation energy of the polysulfone oxidation that takes place at a temperature (545 degrees C) 80 degrees C lower than in the raw polymer (625 degrees C).
机译:聚合物膜是加强化学工业分离过程的重要工具,涉及诸如二氧化碳封存,H-2生产以及供水和处置等战略任务。混合基质膜和支撑膜已经得到了广泛的发展。最近,其中许多基于金属有机框架(MOF)。但是,MOF对聚合物基体的大部分影响尚待确定。现在已经量化了由MOF ZIF-8和聚砜的组合产生的与热行为有关的影响。聚合物的催化氧化强烈受MOF晶体尺寸和膜内分布的影响。 140 nm大小的16 wt%ZIF-8负载导致聚砜氧化的观察到的活化能降低40%,该活化能在温度(545摄氏度)比原料聚合物(625摄氏度)低80摄氏度时发生)。

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