In the present study, robust organic/inorganic dual-network membranes were designed by combining the advantages of polysesquioxane with superior thermal and structural stabilities, and polyether with outstanding CO-philic and film-forming abilities. Specifically, a typical polysesquioxane precursor, bis(triethoxysilyl)ethane (BTESE), was selected to generate the inorganic-based amorphous network via a hydrolysis and condensation process, during which polyethylene glycol (PEG) was introduced to form the organic network. The Si-O-Si network derived from BTESE could provide excellent mechanical stability, while the repeat polar ethylene oxide units contained in PEG were expected to furnish a strong affinity toward CO through dipolar-dipolar interactions. In comparison to individual membranes, the dual-network membranes presented both attractive CO/N separation performance and improved structural stability. These dual-network membranes proposed in this work hold great potential in industrial flue gas carbon capture and the strategies for designing such inorganic–organic dual-network membranes could be extended to other robust inorganic–organic hybrid films/materials.

中文翻译：

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开发用于烟气碳捕获的坚固的聚倍半氧烷/聚合物双网络杂化膜


在本研究中，结合具有优异的热稳定性和结构稳定性的聚倍半氧烷和具有出色的亲CO和成膜能力的聚醚的优点，设计了坚固的有机/无机双网络膜。具体来说，选择典型的聚倍半氧烷前体双（三乙氧基甲硅烷基）乙烷（BTESE）通过水解和缩合过程生成无机基无定形网络，在此过程中引入聚乙二醇（PEG）形成有机网络。来自 BTESE 的 Si-O-Si 网络可以提供优异的机械稳定性，而 PEG 中包含的重复极性环氧乙烷单元有望通过偶极-偶极相互作用提供对 CO 的强亲和力。与单个膜相比，双网络膜既具有有吸引力的CO/N分离性能，又具有改进的结构稳定性。这项工作中提出的这些双网络膜在工业烟气碳捕获方面具有巨大的潜力，设计这种无机-有机双网络膜的策略可以扩展到其他坚固的无机-有机杂化薄膜/材料。