Morozova Sofia M, Lozinskaya Elena I, Sardon Haritz, Suárez-García Fabian, Vlasov Petr S, Vaudemont Régis, Vygodskii Yakov S, Shaplov Alexander S
A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences (INEOS RAS), Vavilov Str. 28, 119991 Moscow, Russia.
Laboratory of Solution Chemistry of Advanced Materials and Technologies, ITMO University, Lomonosova str. 9, 191002 St. Petersburg, Russia.
Membranes (Basel). 2020 Sep 18;10(9):240. doi: 10.3390/membranes10090240.
The growing concern for climate change and global warming has given rise to investigations in various research fields, including one particular area dedicated to the creation of solid sorbents for efficient CO capture. In this work, a new family of poly(ionic liquid)s (PILs) comprising cationic polyureas (PURs) with tetrafluoroborate (BF) anions has been synthesized. Condensation of various diisocyanates with novel ionic diamines and subsequent ion metathesis reaction resulted in high molar mass ionic PURs (M = 12 ÷ 173 × 10 g/mol) with high thermal stability (up to 260 °C), glass transition temperatures in the range of 153-286 °C and remarkable CO capture (10.5-24.8 mg/g at 0 °C and 1 bar). The CO sorption was found to be dependent on the nature of the cation and structure of the diisocyanate. The highest sorption was demonstrated by tetrafluoroborate PUR based on 4,4'-methylene-bis(cyclohexyl isocyanate) diisocyanate and aromatic diamine bearing quinuclidinium cation (24.8 mg/g at 0 °C and 1 bar). It is hoped that the present study will inspire novel design strategies for improving the sorption properties of PILs and the creation of novel effective CO sorbents.
对气候变化和全球变暖日益增长的关注引发了各个研究领域的调查，包括一个专门致力于制备用于高效捕获二氧化碳的固体吸附剂的特定领域。在这项工作中，合成了一个新的聚离子液体（PILs）家族，其由带有四氟硼酸根（BF）阴离子的阳离子聚脲（PURs）组成。各种二异氰酸酯与新型离子二胺的缩合以及随后的离子复分解反应产生了具有高热稳定性（高达260℃）、玻璃化转变温度在153 - 286℃范围内且具有显著二氧化碳捕获量（在0℃和1巴下为10.5 - 24.8毫克/克）的高摩尔质量离子型聚脲（M = 12÷173×10克/摩尔）。发现二氧化碳吸附取决于阳离子的性质和二异氰酸酯的结构。基于4,4'-亚甲基双（环己基异氰酸酯）二异氰酸酯和带有喹核铵阳离子的芳族二胺的四氟硼酸根聚脲表现出最高的吸附量（在0℃和1巴下为24.8毫克/克）。希望本研究将激发用于改善聚离子液体吸附性能的新设计策略以及新型有效二氧化碳吸附剂的创造。
