【摘要】 研究了尿素-氯化胆碱低共熔溶剂DES的制备方法。通过监控制备过程中折光率、电导率和密度等性质指标的变化，考察了尿素-氯化胆碱DES合成规律及影响因素。采用红外光谱表征了所合成DES的分子结构。使用AMS软件中COSMO-RS模块对DES其中的尿素和氯化胆碱分子中的表面电荷密度分布进行了模拟，剖析了氢键作用机制。比较了干法和湿法制备DES对所得产物性质的影响。针对湿法制备的实验结果表明，在氯化胆碱与尿素摩尔比1∶2,第一阶段温度控制在80℃脱水，第二阶段温度控制在120℃深度脱水，所得DES与干法制备的DES主要性质指标相近。此外，湿法制备的DES不会出现干法放大制备时产物时常出现凝固的现象，为尿素-氯化胆碱低共熔绿色溶剂的工业化放大生产提供了一个新的思路。同时，以尿素-氯化胆碱DES为溶剂制备了铜锰金属氧化物前体，经煅烧后得到CuMn₂O₄,且结晶度较好。更多还原

【Abstract】 A preparation of choline chloride-urea deep eutectic solvent was studied.By monitoring the change of such properties as refractive index, conductivity and density etc.in the preparation, the DES synthesis and factors of affecting their properties was investigated, respectively.Using COSMO-RS module in AMS software, the surface charge density distribution of DES and its urea and choline chloride molecules was simulated, and the hydrogen bonding mechanism was analyzed.The possible chemical structure of DES was analyzed by infrared spectrum and was compared with dry DES.The experimental results showed that when the molar ratio of choline chloride to urea was 1∶2,first temperature stage was controlled at 80°C for vacuum evaporation and second at 120°C for deep removing of water in the DES,the property index of the obtained DES was similar to that of dry preparation.In addition, it was found that the DES from wet preparation would not exhibit a solidification like the dry one.At the same time, Cu and Mn metal oxide precursors were prepared by using urea choline chloride des as solvent.CuMn₂O₄ was obtained after calcination, and the crystallinity was good.更多还原