氯化胆碱
共晶体系
结晶度
表征(材料科学)
化学工程
热稳定性
热导率
材料科学
化学
有机化学
微观结构
纳米技术
结晶学
复合材料
工程类
作者
Rita Craveiro,Ivo Manuel Ascensão Aroso,V. Flammia,Tânia Carvalho,María Teresa Viciosa,Madalena Dionı́sio,Susana Barreiros,Rui L. Reis,Ana Rita C. Duarte,Alexandre Paiva
标识
DOI:10.1016/j.molliq.2016.01.038
摘要
Natural deep eutectic solvents (NADES) have shown to be promising sustainable media for a wide range of applications. Nonetheless, very limited data is available on the properties of these solvents. A more comprehensive body of data on NADES is required for a deeper understanding of these solvents at molecular level, which will undoubtedly foster the development of new applications. NADES based on choline chloride, organic acids, amino acids and sugars were prepared, and their density, thermal behavior, conductivity and polarity were assessed, for different NADES compositions. The NADES studied can be stable up to 170 °C, depending on their composition. The thermal characterization revealed that all the NADES are glass formers and some, after water removal, exhibit crystallinity. The morphological characterization of the crystallizable materials was performed using polarized optical microscopy which also provided evidence of homogeneity/phase separation. The conductivity of the NADES was also assessed from 0 to 40 °C. The more polar, organic acid-based NADES presented the highest conductivities. The conductivity dependence on temperature was well described by the Vogel–Fulcher–Tammann equation for some of the NADES studied.
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