Biomaterials, Biodegradables and Biomimetics Research Group

Papers in Scientific Journals

Properties and thermal behavior of natural deep eutectic solvents

Abstract

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.

Journal
Journal Of Molecular Liquids
Volume
215
Pagination
534-540
Publisher
Elsevier
ISSN
0167-7322
URL
http://www.sciencedirect.com/science/article/pii/S0167732215303019
Keywords
Cholinr chloride, conductivity, Deep eutectic eolvents, Physical properties, Thermal analysis
Rights
Restricted Access
Peer Reviewed
Yes
Status
published
This website uses cookies. By using this website you consent to our use of these cookies. For more information visit our Policy Page.