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Facile development of microstructure-engineered, ligand-chelated SiO2–ZrO2 composite membranes for molecular separations
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-4-9 , DOI: 10.1039/d1me00011j Sulaiman O. Lawal 1, 2, 3, 4, 5 , Hiroki Nagasawa 1, 2, 3, 4, 5 , Toshinori Tsuru 1, 2, 3, 4, 5 , Masakoto Kanezashi 1, 2, 3, 4, 5
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-4-9 , DOI: 10.1039/d1me00011j Sulaiman O. Lawal 1, 2, 3, 4, 5 , Hiroki Nagasawa 1, 2, 3, 4, 5 , Toshinori Tsuru 1, 2, 3, 4, 5 , Masakoto Kanezashi 1, 2, 3, 4, 5
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In this study an easy template was devised for the fabrication and microstructural control of ligand-chelated, silica–zirconia-based composite membranes with a thickness of less than 400 nm. Hybrid materials with crosslinking between the organic moieties were successfully fabricated via the sol–gel co-condensation of 3-(trimethoxysilyl)propyl methacrylate and zirconium(IV) butoxide chelated via acetylacetone and allyl acetoacetate ligands using an azobisisobutyronitrile radical initiator as a crosslinking agent. Characterization of the films and gels via FTIR, XRD and thermogravimetry indicated that both the polymerization and hybridization of the networks was achieved. Gas permeation experiments showed that the organic crosslink-derived membranes possess molecular sieving properties (H2 permeance: ≈10−7 mol m−2 s−1 Pa−1; H2/N2 selectivity: ≈20–30) that are superior to those of non-crosslink-derived membranes (H2 permeance: ≈10−7 mol m−2 s−1 Pa−1; H2/N2 selectivity: ≈7–11). Quantitative analysis of the microstructures of the membranes based on the permeation behaviors of H2 and N2 revealed that organic crosslinking led to significant control of the microstructural characteristics of the membranes.
中文翻译：
微结构工程，配体螯合的SiO2-ZrO2复合膜用于分子分离的简便开发
在这项研究中，设计了一种简单的模板，用于配体螯合的二氧化硅-氧化锆基复合膜的制备和微结构控制，厚度小于400 nm。与有机基团之间的交联的混合材料被成功地制备通过3-（三甲氧基甲硅烷）的溶胶-凝胶共缩合丙基甲基丙烯酸酯和锆（IV螯合）丁醇通过使用偶氮二异丁腈自由基引发剂作为交联剂乙酰丙酮和乙酰乙酸烯丙酯的配体。通过膜表征膜和凝胶FTIR，XRD和热重分析表明，网络的聚合和杂交均实现。气体渗透实验表明，有机交联衍生的膜具有分子筛性能（H 2渗透性：≈10 -7摩尔米-2小号-1帕-1 ; H 2 / N 2选择性：≈20-30）具有优于那些非交联衍生的膜的（H 2渗透性：≈10 -7摩尔米-2小号-1帕-1 ; H 2 / N 2选择性：≈7-11）。基于H 2和N 2的渗透行为对膜的微结构进行定量分析表明，有机交联导致对膜的微结构特征的显着控制。
更新日期：2021-04-22
中文翻译：
微结构工程，配体螯合的SiO2-ZrO2复合膜用于分子分离的简便开发
在这项研究中，设计了一种简单的模板，用于配体螯合的二氧化硅-氧化锆基复合膜的制备和微结构控制，厚度小于400 nm。与有机基团之间的交联的混合材料被成功地制备通过3-（三甲氧基甲硅烷）的溶胶-凝胶共缩合丙基甲基丙烯酸酯和锆（IV螯合）丁醇通过使用偶氮二异丁腈自由基引发剂作为交联剂乙酰丙酮和乙酰乙酸烯丙酯的配体。通过膜表征膜和凝胶FTIR，XRD和热重分析表明，网络的聚合和杂交均实现。气体渗透实验表明，有机交联衍生的膜具有分子筛性能（H 2渗透性：≈10 -7摩尔米-2小号-1帕-1 ; H 2 / N 2选择性：≈20-30）具有优于那些非交联衍生的膜的（H 2渗透性：≈10 -7摩尔米-2小号-1帕-1 ; H 2 / N 2选择性：≈7-11）。基于H 2和N 2的渗透行为对膜的微结构进行定量分析表明，有机交联导致对膜的微结构特征的显着控制。
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