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首页> 美国卫生研究院文献>Membranes >Influence of Anion Structure on Thermal Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate Iongels
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Influence of Anion Structure on Thermal Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate Iongels

机译：阴离子结构对UV交联聚乙二醇二丙烯酸酯单体的热机械和CO2溶解度性能的影响

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Iongel-based CO separation membranes were prepared by fast (< 1 min) UV-initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) in the presence of different ionic liquids (ILs) with the [C mim] cation and anions such as [TFSI] , [FSI] , [C(CN) ] and [B(CN) ] . The four ILs were completely miscible with the non-ionic PEGDA network. Transparent and free-standing iongels containing between 60 and 90 %wt of IL were obtained and characterized by diverse techniques (FTIR, TGA, DSC, DMTA, SEM, CO solubility and pure gas permeability). The thermal and mechanical stability of the iongels, as well as CO solubility, were found to be strictly dependent on the IL content and the anion’s nature. The TGA results indicated that the iongels mostly follow the thermal profile of the respective neat ILs. The DMTA analysis revealed that the iongels based on fluorinated anions have higher storage modulus than those of cyano-functionalized anions. Conversely, the PEGDA–C(CN) iongels presented the highest CO solubility values ranging from 72 to 80 mmol/g. Single CO permeabilities of 583 ± 29 Barrer and ideal CO /N selectivities of 66 ± 3 were obtained with the PEGDA–70 C(CN) iongel membrane. This work demonstrates that the combination of PEGDA with high contents of the best performing ILs is a promising and simple strategy, opening up new possibilities in the design of high-performance iongel membranes for CO separation.
机译：在具有[C mim]阳离子和阴离子的不同离子液体（ILs）存在下，通过聚乙二醇二丙烯酸酯（PEGDA）的快速（<1分钟）紫外线引发的聚合反应制备基于Iongel的CO分离膜。 [TFSI]，[FSI]，[C（CN）]和[B（CN）]。四个IL与非离子PEGDA网络完全混溶。获得了包含60％至90％wt IL的透明且独立的离子凝胶，并通过多种技术（FTIR，TGA，DSC，DMTA，SEM，CO溶解度和纯气体渗透性）进行了表征。发现离子凝胶的热和机械稳定性以及一氧化碳的溶解度严格取决于IL含量和阴离子的性质。 TGA结果表明，离子凝胶主要遵循各自纯净IL的热曲线。 DMTA分析表明，基于氟化阴离子的离子凝胶具有比氰基官能化阴离子更高的储能模量。相反，PEGDA-C（CN）离子凝胶的最高CO溶解度值介于72至80 mmol / g之间。用PEGDA–70 C（CN）离子凝胶膜可获得583±29 Barrer的单个CO渗透率和66±3的理想CO / N选择性。这项工作表明，PEGDA与高含量，性能最佳的IL的结合是一种有前途的简单策略，为设计用于CO分离的高性能离子凝胶膜开辟了新的可能性。

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