Physical properties of ethylene glycol-based deep eutectic solvents

Ibrahim, Rusul Khaleel; Hayyan, Maan; AlSaadi, Mohammed Abdulhakim; Ibrahim, Shaliza; Hayyan, Adeeb; Hashim, Mohd Ali

doi:10.1016/j.molliq.2018.12.032

Cited by 200 publications

(112 citation statements)

References 48 publications

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“…However, due to the high density and viscosity of several DESs with TEOA at room temperature, it is advisable to apply these DESs in the technological processes at temperatures higher than 313.15 K. TEOA:G has less electrical conductivity compared to the literature values for the ChCl:G (1:2). 18,24 The same case is for the TEOA:EG, which electrical conductivity is lower than those reported for ChCl:EG in the molar ratios of 1:1 13 and 1:2 20 but higher than that of the ChCl:triethylene glycol (1:3) DES. 21 The electrical conductivity of TEOA:PEG is lower than that of ChCl:PEG (1:2).…”

Section: O N L I N E F I R S Tmentioning

confidence: 50%

“…TEOA:G has a higher density than N,N-diethylethanol ammonium chloride:G (1:2), 16 tetrapropylammonium bromide:glycerol (1:3), 17 choline chloride:G (1:2) 18 because TEOA has the highest number of -OH groups and makes the stronger intermolecular H-bonds network than the other DESs with glycerol. 19 For the same reason the density of TEOA:EG is higher than the density of the N,N-diethylethanol ammonium chloride:EG DES 16 and ChCl:EG in the molar ratios of 1:1 and 1:2 13,18,20 but lower than the density of the ChCl:triethylene glycol DES in the 1:3 molar ratio 21 and the density of TEOA:OA is higher than that of ChCl:OA (1:1) 12,13 and N,N-diethylethanol ammonium chloride:OA (3:2). 22 Although TEOA has a higher number of -OH groups than ChCl, the density of TEOA:PEG is lower than the density for ChCl:PEG (1:2) 18 .…”

Section: Effect Of Temperature On Density Of Dessmentioning

confidence: 98%

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The physicochemical properties of the deep eutectic solvents with triethanolamine as a major component

et al. 2020

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Different deep eutectic solvents (DESs) of triethanolamine (TEOA) and oxalic acid (OA), glacial acetic acid (AA), L-(+)-lactic acid (LA), oleic acid (OLA), glycerol (G), ethylene glycol (EG), propylene glycol (PEG), choline chloride (ChCl) or 1,3-dimethylurea (DMU) were prepared and characterized re-garding their physicochemical (density, viscosity, electrical conductivity, refract-tive index, coefficient of volume expansion, molecular volume, lattice energy, and heat capacity) properties over the temperature range of 293.15-363.15 K at 101.325 kPa. For all tested DESs, the density, viscosity and refractive index decreased with increasing the temperature while the electrical conductivity increased. Those temperature dependence for viscosity and electrical conducti-vity are described by the Vogel-Tamman-Fulcher equations. The viscosity and molar conductivity, which exhibited a linear behavior, were correlated by the fractional Walden rule. Besides, the Fourier transform infrared spectroscopy (FTIR) was used to study the functional groups of these DESs while thermogra-vimetric analysis (TGA) and differential scanning calorimetry (DSC) provided the information about their stability. The tested DESs of TEOA possess desirable properties for use in various industrial processes, such as extractions, separations, chemical technology and biotechnology. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 45001, Grant no. 451-03-68/2020-14/200133]

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Section: O N L I N E F I R S Tmentioning

confidence: 50%

Section: Effect Of Temperature On Density Of Dessmentioning

confidence: 98%

The physicochemical properties of the deep eutectic solvents with triethanolamine as a major component

et al. 2020

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“…The DES used in this work is composed of an HBD, polyethylene glycol (PEG200) or propylene glycol (PG), and the quaternary ammonium salt choline chloride (ChCl) in a 5 HBD: 1 ChCl molar ratio 35,36 . The HBDs PEG200 and PG were selected over the commonly used HBD ethylene glycol 37 due to their nontoxic nature and GRAS (generally recognized as safe) classifications by the U.S. Food and Drug Administration 38,39 , and choline chloride is a biocompatible, mass-produced salt primarily used in animal feed 40 . In this work, we show that the surface functional group on the fumed silica particles drastically influences the DES/silica mixture rheology, and we report a class of shear-thinning organogels composed of a conductive DES and fumed silica particles with the functional group 3-trimethoxysilylpropylmethacrylate.…”

Section: Introductionmentioning

confidence: 99%

Sensorized tissue analogues enabled by a 3D-printed conductive organogel

et al. 2021

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State-of-the-art tissue analogues used in high-fidelity, hands-on medical simulation modules can deliver lifelike appearance and feel but lack the capability to provide quantified, real-time assessment of practitioner performance. The monolithic fabrication of hybrid printed/textile piezoresistive strain sensors in a realistic Y/V plasty suture training pad is demonstrated. A class of 3D-printable organogels comprised of inexpensive and nonhazardous feedstocks is used as the sensing medium, and conductive composite threads are used as the electrodes. These organogels are comprised of a glycol-based deep-eutectic solvent (DES) serving as the ionic conductor and 3-trimethoxysilylmethacrylate-capped fumed silica particles serving as the gelating agent. Rheology measurements reveal the influence of fumed silica particle capping group on the mixture rheology. Freestanding strain sensors demonstrate a maximum strain amplitude of 300%, negligible signal drift, a monotonic sensor response, a low degree of hysteresis, and excellent cyclic stability. The increased contact resistance of the conductive thread electrodes used in place of wire electrodes do not make a significant impact on sensor performance. This work showcases the potential of these organogels utilized in sensorized tissue analogues and freestanding strain sensors for widespread applications in medical simulation and education.

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“…Recently, multiple ethylene glycol (EG)-based eutectic solvents were synthesized for electrochemical applications [ 7 ]. The physical properties of these DES such as density, viscosity, conductivity, and surface tension are greatly influenced by the ratio of the EG (HBD) and the nature and concentration of the HBA [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Nanocomposite Platform, Based on Carbon Nanotubes and Poly(Methylene Blue) Redox Polymer Synthesized in Ethaline Deep Eutectic Solvent for Electrochemical Determination of 5-Aminosalicylic Acid

Hosu

Bârsan

Săndulescu

et al. 2021

Sensors

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A novel hybrid composite of conductive poly(methylene blue) (PMB) and carbon nanotubes (CNT) was prepared for the detection of 5-aminosalicylic acid (5-ASA). Electrosynthesis of PMB with glassy carbon electrode (GCE) or with carbon nanotube modified GCE was done in ethaline deep eutectic solvent of choline chloride mixed with ethylene glycol and a 10% v/v aqueous solution. Different sensor architectures were evaluated in a broad range of pH values in a Britton-Robinson (BR) buffer using electrochemical techniques, chronoamperometry (CA), and differential pulse voltammetry (DPV), to determine the optimum sensor configuration for 5-ASA sensing. Under optimal conditions, the best analytical performance was obtained with CNT/PMBDES/GCE in 0.04 M BR buffer pH 7.0 in the range 5–100 µM 5-ASA using the DPV method, with an excellent sensitivity of 9.84 μA cm−2 μM−1 (4.9 % RSD, n = 5) and a detection limit (LOD) (3σ/slope) of 7.7 nM, outclassing most similar sensors found in the literature. The sensitivity of the same sensor obtained in CA (1.33 μA cm−2 μM−1) under optimal conditions (pH 7.0, Eapp = +0.40 V) was lower than that obtained by DPV. Simultaneous detection of 5-ASA and its analogue, acetaminophen (APAP), was successfully realized, showing a catalytic effect towards the electro-oxidation of both analytes, lowering their oxidation overpotential, and enhancing the oxidation peak currents and peak-to-peak separation as compared with the unmodified electrode. The proposed method is simple, sensitive, easy to apply, and economical for routine analysis.

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Physical properties of ethylene glycol-based deep eutectic solvents

Cited by 200 publications

References 48 publications

The physicochemical properties of the deep eutectic solvents with triethanolamine as a major component

The physicochemical properties of the deep eutectic solvents with triethanolamine as a major component

Sensorized tissue analogues enabled by a 3D-printed conductive organogel

Hybrid Nanocomposite Platform, Based on Carbon Nanotubes and Poly(Methylene Blue) Redox Polymer Synthesized in Ethaline Deep Eutectic Solvent for Electrochemical Determination of 5-Aminosalicylic Acid

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