A great deal of fossil fuel is consumed due to enormous industrial and domestic activities. Meanwhile, massive emissions of CO₂ have led to global warming. Replacing coal with natural gas will greatly decrease CO₂ emissions. However, this requires cutting‐edge technologies to purify CH₄. Polymeric membranes with both high permeability and high selectivity are preferred but there exists a trade‐off between them. To solve the problem, we incorporated the UiO‐66 and UiO‐66‐NH₂ metal organic frameworks (MOFs) nanoparticles into a Tröger's base polymer, dimethylbiphenyl Tröger's base polymer (DMBPTB). The CO₂ permeability of the UiO‐66/DMBPTB nanocomposite membranes increased by 13 folds with a marginal decrease in selectivity. Moreover, the composite membranes with amine‐functionalized UiO‐66 nanoparticles showed higher permeability and selectivity to the CO₂/CH₄ gas pair. The best gas separation performance was obtained for the composite membrane having 30 wt% UiO‐66‐NH₂ nanoparticle, where the selectivity of CO₂/CH₄ was 18.0, and the CO₂ permeability was 744 Barrer.

中文翻译：

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制备具有增强的CO2 / CH4选择性的UiO-66 / DMBPTB和UiO-66-NH2 / DMBPTB纳米复合膜，用于气体分离

由于大量的工业和家庭活动，消耗了大量的化石燃料。同时，大量的CO ₂排放导致了全球变暖。用天然气代替煤炭将大大减少CO ₂排放。但是，这需要尖端技术来纯化CH ₄。具有高渗透性和高选择性的聚合物膜是优选的，但它们之间需要权衡。为了解决该问题，我们将UiO-66和UiO-66-NH ₂金属有机骨架（MOF）纳米粒子掺入了Tröger的基础聚合物，二甲基联苯Tröger的基础聚合物（DMBPTB）中。一氧化碳₂UiO-66 / DMBPTB纳米复合膜的通透性增加了13倍，选择性略有降低。此外，具有胺官能化UiO-66纳米颗粒的复合膜对CO ₂ / CH ₄气体对表现出更高的渗透性和选择性。具有30 wt％UiO-66-NH ₂纳米颗粒的复合膜获得了最佳的气体分离性能，其中CO ₂ / CH ₄的选择性为18.0，CO _2的渗透率为744 Barrer。