Recently, hollow filler as an emerging concept is attracting more attention in preparation of mixed matrix membranes (MMMs). Herein, poly(ethylene glycol) microcapsules (PMC) are synthesized via distillation precipitation polymerization and embedded into the polyetherimide (Ultem®1000) matrix to fabricate MMMs for CO₂ capture. The PMC exhibits a preferential hollow structure within the Ultem matrix to furnish highways within membrane, and thus achieve high gas permeability. Meanwhile, the favorable affinity of poly(ethylene glycol) (PEG) microcapsule with ether oxygen group (EO) towards CO₂ enhances the CO₂ solubility selectivity. Such integration of physical and chemical microenvironments in the as-designed PEG microcapsule affords highly enhanced CO₂ separation performance. Compared to pristine Ultem®1000, the membrane with 2.5 wt% PMC loading exhibits 310% increment in CO₂ permeability and 22% increment in CO₂/N₂ selectivity, which shows the promising prospects of designing PEG-containing microcapsules as the filler of MMMs for CO₂ capture.

近年来，作为一种新兴概念的中空填料在制备混合基质膜（MMM）中引起了更多的关注。本文中，聚（乙二醇）微囊（PMC）是通过蒸馏沉淀聚合法合成的，并嵌入到聚醚酰亚胺（Ultem®1000）基质中以制造用于CO ₂捕获的MMM 。PMC在Ultem基质中表现出优先的中空结构，以在膜内提供高速公路，从而实现高透气性。同时，聚乙二醇（PEG）微囊与醚氧基团（EO）对CO ₂的有利亲和力增强了CO ₂溶解度选择性。物理和化学微环境在设计的PEG微胶囊中的这种整合提供了高度增强的CO ₂分离性能。与原始Ultem®1000相比，PMC负载量为2.5 wt％的膜的CO ₂渗透率增加310％，CO ₂ / N ₂选择性增加22％，这表明设计含PEG的微胶囊作为填充剂的前景广阔。用于捕获CO _2的MMM 。