Properties and thermal behavior of natural deep eutectic solvents

Craveiro, Rita; Aroso, Ivo Manuel Ascensão; Flammia, V.; Carvalho, Tânia; Viciosa, María Teresa; Dionı́sio, Madalena; Barreiros, Susana; Reis, Rui L.; Duarte, Ana Rita C.; Paiva, Alexandre

doi:10.1016/j.molliq.2016.01.038

Cited by 294 publications

(161 citation statements)

References 22 publications

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“…It is clear that conductivity increases as viscosity decreases. Considering further the effect of temperature on conductivity, the increase in conductivity on heating is a result of two effects: i) lower viscosity (see above) and ii) increased ionic mobility at higher temperatures.…”

Section: Figurementioning

confidence: 99%

Self‐Assembled Gels Formed in Deep Eutectic Solvents: Supramolecular Eutectogels with High Ionic Conductivity

et al. 2019

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1,3:2,4‐Dibenzylidene‐d‐sorbitol (DBS), a simple, commercially relevant compound, was found to self‐assemble as a result of intermolecular noncovalent interactions into supramolecular gels in deep eutectic solvents (DESs) based on choline chloride combined with alcohols/ureas. DBS formed gels at a loading of 5 % w/v. Rheology confirmed the gel‐like nature of the materials, electron microscopy and X‐ray diffraction indicated underpinning nanofibrillar DBS networks, and differential scanning calorimetry showed the DES nature of the liquid‐like phase was retained. The ionic conductivities of the gels were similar to those of the unmodified DESs, thus proving the deep eutectic nature of the ionic liquid‐like phase. Gelation was tolerant of ionic additives Li+, Mg2+, and Ca2+; the resulting gels had similar conductivities to electrolyte dissolved in the native DES. The low‐molecular‐weight gelator DBS is thus a low‐cost additive that forms gels in DESs from readily available constituents, with conductivity levels suitable for practical applications.

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Section: Figurementioning

confidence: 99%

Self‐Assembled Gels Formed in Deep Eutectic Solvents: Supramolecular Eutectogels with High Ionic Conductivity

et al. 2019

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“…When it talks about “eutectic”, one may think about the mixture's melting point. However, along with some ILs and DESs, most EMLs (this work) just have glass transition temperature ( T g ) (Figure S4) . Interestingly, T g of 56 EMLs have the same rule with theirs T onse t and T peak (Figure b).…”

Section: Resultsmentioning

confidence: 70%

Eutectic Molecular Liquids Based on Hydrogen Bonding and π–π Interaction for Exfoliating Two‐dimensional Materials and Recycling Polymers

Mou

Zhao

et al. 2019

Chemistry An Asian Journal

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Eutectic molecular liquids (EMLs) based on hydrogen‐bonding interaction and π–π stacking were prepared. We found that the thermodynamic properties like initial decomposition temperature and glass transition temperature of EMLs are mainly dominated by the hydrogen bond donor, which is beneficial for designing and preparing new EMLs. These new liquid systems could be applied in the field of environmental and material science.

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“…Potassium carbonate has a freezing point at 891°C while glycerol is 17°C [11] and when the two components are mixed in a certain ratio, it will produce a mixture which have significantly lower melting point than each component singularly [10].…”

Section: Freezing Point Of Desmentioning

confidence: 99%

“…DES is produced by mixing two components in the amount of certain ratios to produce a mixture which has significantly lower melting points than each of the components singularly [10]. In 2013, potassium carbonate and glycerol were used in different molar ratio to synthesis a new DES system.…”

Section: Introductionmentioning

confidence: 99%

Vitamin E extraction from red palm biodiesel by using K2CO3 based deep eutectic solvent with glycerol as hydrogen bond donor

Manurung

Hutauruk

Arief

2018

AIP Conference Proceedings

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Abstract. Vitamin E has essential role in human body and it has high avalability in red palm biodiesel which encourages the development of separation technology to obtain this material. Deep Eutectic Solvent (DES) is the latest advancement in separation technology to extract vitamin E from it's source. in this research, Potassium carbonate (K2CO3) based DES with hydrogen bond donor (HBD) of glycerol was used to extract vitamin E from red palm biodiesel. The DES was synthesized at 80 o C for 1 hour at 300 rpm and K2CO3 to glycerol molar ratio was varied at 1:5, 1:6 and 1:7. Red palm biodiesel was synthesized by degumming CPO with 85% Posfat Acid followed by transesterification with etanol at 70 o C for 1.5 hours. Etanol to DPO molar ratio was fixed at 9:1 and catalyst concentration was 1.2%. The produced biodiesel was washed with aqudest. The liquid-liquid extraction was performed to extract vitamin E by mixing biphasic system between DES and CPO at stirring rate of 400 rpm for 3. Biodiesell : DES mass ratio was viaried at 1:2; 1:2.5, 1:3, 1:3.5, and 1:4. Recovery of vitamin E was performed by using water-hexan in ratio of 4:1 (v/v). The characterization of DES was performed by analyzing the form and measuring the freezing point, density and viscisity of DES. Vitamin E concentration was analyzed by using High Performance Liquid Chromatography (HPLC). Extraction using DES K2CO3 to glycerol molar ratio of 1:6 and biodiesel to DES mass ratio of 1:3 gave the highest vitamin E concentration at 801.23 ppm. The higher fraction in extracted vitamin E from red palm biodiesel is tocotrienol and especialy γ-Tocotrienol by using DES6 at biodiesel to DES ratio of 1:3. Tocotrienol is the vitamin E fraction which has highest anticancer activity.

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Properties and thermal behavior of natural deep eutectic solvents

Cited by 294 publications

References 22 publications

Self‐Assembled Gels Formed in Deep Eutectic Solvents: Supramolecular Eutectogels with High Ionic Conductivity

Self‐Assembled Gels Formed in Deep Eutectic Solvents: Supramolecular Eutectogels with High Ionic Conductivity

Eutectic Molecular Liquids Based on Hydrogen Bonding and π–π Interaction for Exfoliating Two‐dimensional Materials and Recycling Polymers

Vitamin E extraction from red palm biodiesel by using K2CO3 based deep eutectic solvent with glycerol as hydrogen bond donor

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