Deep eutectic solvents as an additive in modification of membranefor nano- and ultrafiltration: physic-chemistry characteristics, ftir study and electrochemical behavior
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Дата
2021
Автори
Науковий керівник
Назва журналу
Номер ISSN
Назва тому
Видавець
КПІ ім. Ігоря Сікорського; ТОВ «Українська водна спілка»
Анотація
Deep eutectic solvents (DESs) are a new class of solvents that can offset some of the primary
drawbacks of typical solvents and ionic liquids. They are synthesized by simply mixing the
components that interact with each other through hydrogen bonds, and form a eutectic mixture with
a melting point much lower than each component individually. Deep eutectic solvents is usually
liquid at temperatures below 100 C. Thanks to these great advantages, deep eutectic solvents is
attracting more and more attention in many areas of research. Very recently, great attention has
been paid to new pioneering attempts aiming at deep eutectic solvents into the field of chemical
engineering, including membrane science and technology. Even if just a same works have been
currently reported in applying deep eutectic solvents in membranes, the consideration on this new
type of solvents is continuously growing. New deep eutectic solvents based on choline chloride
(ChCl)–lactic acid (1:2 M ratio) was obtained and its electrochemical characteristics was studied.
The synthesis of deep eutectic solvents was confirmed by FA nuclear magnetic resonance (NMR)
spectrometry method. FTIR study provided further details into hydrogen bonding upon mixing.
FTIR results confirmed that H-bonds, occurring between two components in deep eutectic solvents,
were the main force leading to the eutectic formation. The frequency at 3221 cm−1 can be attributed
to the oscillations of the O-H bond in the formation of OH-Cl-ChCl. The main physicochemical
characteristics of deep eutectic solutions (density, pH) are determined. The electrochemical
behavior was investigated of choline chloride (ChCl)–lactic acid deep eutectic solvent (DES) by
cyclic voltammetry. The method of cyclic voltammetry found that the oxidation of deep eutectic
solvents is fixed at a potential of Ea1 = 0.54 V
Опис
Ключові слова
choline chloride (ChCl)–lactic acid, deep eutectic solvents, ionic liquids, хлорид холіну - молочна кислота, глибоко евтектичні розчинники, іонні рідини
Бібліографічний опис
Vorobyova, V. Deep eutectic solvents as an additive in modification of membranefor nano- and ultrafiltration: physic-chemistry characteristics, ftir study and electrochemical behavior / V. Vorobyova, M. Skiba // Вода і водоочисні технології. Науково-технічні вісті. – 2021. – № 3(31). – С. 12-18.