A comprehensive review on the rheological behavior of imidazolium based ionic liquids and natural deep eutectic solvents

Elhamarnah, Yousef; Nasser, Mustafa S.; Qiblawey, Hazim; Benamor, Abdelbaki; Atilhan, Mert; Aparicio, Santigo

doi:10.1016/j.molliq.2019.01.002

Cited by 81 publications

(48 citation statements)

References 89 publications

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“…Figure 11 illustrates the variation of dynamic viscosity of pure IL+water solutions and its nanofluids for different concentrations of Ti 3 C 2 nanosheet in the temperature range from 25 °C to 60 °C. The viscosity of the pure IL+ water is lower than that of pure IL as less viscous water is added to IL [ 79 ]. It is obvious from the graph that the dynamic viscosity of the IL+ water solution increases from 2.694 mPa.s to 2.986 mPa.s when Ti 3 C 2 nanosheets are added by 0.05 wt % while for 0.10 wt % and 0.20 wt % nanofluids, the viscosity further increases to 3.011 mPa.s and 3.066 mPa.s respectively.…”

Section: Resultsmentioning

confidence: 99%

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

et al. 2020

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In recent years, solar energy technologies have developed an emerging edge. The incessant research to develop a power source alternative to fossil fuel because of its scarcity and detrimental effects on the environment is the main driving force. In addition, nanofluids have gained immense interest as superior heat transfer fluid in solar technologies for the last decades. In this research, a binary solution of ionic liquid (IL) + water based ionanofluids is formulated successfully with two dimensional MXene (Ti3C2) nano additives at three distinct concentrations of 0.05, 0.10, and 0.20 wt % and the optimum concentration is used to check the performance of a hybrid solar PV/T system. The layered structure of MXene and high absorbance of prepared nanofluids have been perceived by SEM and UV–vis respectively. Rheometer and DSC are used to assess the viscosity and heat capacity respectively while transient hot wire technique is engaged for thermal conductivity measurement. A maximum improvement of 47% in thermal conductivity is observed for 0.20 wt % loading of MXene. Furthermore, the viscosity is found to rise insignificantly with addition of Ti3C2 by different concentrations. Conversely, viscosity decreases substantially as the temperature increases from 20 °C to 60 °C. However, based on their thermophysical properties, 0.20 wt % is found to be the optimum concentration. A comparative analysis in terms of heat transfer performance with three different nanofluids in PV/T system shows that, IL+ water/MXene ionanofluid exhibits highest thermal, electrical, and overall heat transfer efficiency compared to water/alumina, palm oil/MXene, and water alone. Maximum electrical efficiency and thermal efficiency are recorded as 13.95% and 81.15% respectively using IL + water/MXene, besides that, heat transfer coefficients are also noticed to increase by 12.6% and 2% when compared to water/alumina and palm oil/MXene respectively. In conclusion, it can be demonstrated that MXene dispersed ionanofluid might be great a prospect in the field of heat transfer applications since they can augment the heat transfer rate considerably which improves system efficiency.

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Section: Resultsmentioning

confidence: 99%

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

et al. 2020

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“…Shear flow behavior of NADES Flowability of NADES under varied shear rates depend on the apparent viscosity indicating their expected field of application and uses (Elhamarnah et al 2019). The flow behavior of NADES at room temperature has advantages over traditional solvents, so that they can be more easily used and operated in different industrial conditions (Troter et al 2016;Paiva, Matias, and Duarte 2018).…”

Section: Rheological Behavior Of Nadesmentioning

confidence: 99%

“…Some of the authors reported NADES as non-Newtonian liquids, exhibiting sheer-thickening or sheer-thinning behavior depending on the imposed shear rate (Altamash et al 2017;. However, NADES may behave as Newtonian fluids as well, independently of shear rate (Elhamarnah et al 2019;R€ uther et al 2013;Cao et al 2016;Aroso et al 2017). Troter et al (2016) reported a shear-thinning behavior of citric acid:glucose and choline chloride:citric acid at 1:1 molar ratios in the temperature range of 293.15-363.15 K at atmospheric pressure within the shear rate of 0.1-1000 s À1 .…”

Section: Rheological Behavior Of Nadesmentioning

confidence: 99%

The perspectives of natural deep eutectic solvents in agri-food sector

Mišan

Nađpal

Stupar

et al. 2019

Critical Reviews in Food Science and Nutrition

198

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The principles of 'green chemistry' are gaining importance in agri-food sector due to the need to reduce pollution from toxic chemicals, make industrial processes safer and more sustainable, and to offer 'clean-labeled products' required by the consumers. The application of natural deep eutectic solvents (NADES)natural product-based green liquids is considered the promising alternative to conventional organic solvents. This review is intended to summarize and discuss recent advances related to physicochemical properties of NADES, their applications, compatibility with analytic techniques and toxicological profile, pointing out the challenges and necessary improvements for their wider utilization in agri-food sector. NADES allow extraction of wide range of food compounds and they are proven to be convenient for food-related applications. However, their potential for industrial scale-up utilization is not completely investigated. Examined NADES are readily biodegradable, but only preliminary studies on NADES toxicity which include limited number of NADES molecules are available. Apart from fundamental research dealing with NADES formation and the nature of the interactions and structure underpinning the liquid phase formation, the question of purity of NADES obtained by different synthetic methodologies need to be addressed in the future. Data on physicochemical properties of synthetized NADES are still needed as they are relevant for industrial applications.

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“…DES have recently been reflected as alternatives to IL that maintain most of their advantages (e.g. task-purpose tenability) and on the top of that avoid some of the major issues of IL such as economic and environmental concerns [31,32,33,34,35,36]. The synthesis of DES via low-cost sources including natural HBA and HBD, predictable and almost null toxicity and total biodegradability have made both industry and academia consider DES as alternative solvents for gas capture and separation processes in within the green chemistry framework.…”

Section: Introductionmentioning

confidence: 99%

Quantum Chemistry Insight into the Interactions Between Deep Eutectic Solvents and SO2

Altamash

Aparício

2019

Molecules

Self Cite

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A systematic research work on the rational design of task specific Deep Eutectic Solvents (DES) has been carried out via density functional theory (DFT) in order to increase knowledge on the key interaction parameters related to efficient SO2 capture by DES at a molecular level. A total of 11 different DES structures, for which high SO2 affinity and solubility is expected, have been selected in this work. SO2 interactions in selected DES were investigated in detail through DFT simulations and this work has generated a valuable set of information about required factors at the molecular level to provide high SO2 solubility in DES, which is crucial for enhancing the current efficiency of the SO2 capture process and replacing the current state of the art with environmentally friendly solvents and eventually implementing these materials in the chemical industry. Results that were obtained from DFT calculations were used to deduce the details of the type and the intensity of the interaction between DES and SO2 molecules at various interaction sites as well as to quantify short-range interactions by using various methods such as quantum theory of atoms in a molecule (QTAIM), electrostatic potentials (ESP) and reduced density gradients (RDG). Systematic research on the molecular interaction characterization between DES structures and SO2 molecule increases our knowledge on the rational design of task-specific DES.

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A comprehensive review on the rheological behavior of imidazolium based ionic liquids and natural deep eutectic solvents

Cited by 81 publications

References 89 publications

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

Improved Thermophysical Properties and Energy Efficiency of Aqueous Ionic Liquid/MXene Nanofluid in a Hybrid PV/T Solar System

The perspectives of natural deep eutectic solvents in agri-food sector

Quantum Chemistry Insight into the Interactions Between Deep Eutectic Solvents and SO2

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