Thermophysical properties of aqueous solutions of tetraalkylphosphonium based ionic liquids at different temperatures and atmospheric pressure

Warke, Ila J.; Patil, Kesharsingh J.; Terdale, Santosh S.

doi:10.1016/j.jct.2015.09.029

Cited by 17 publications

(4 citation statements)

References 42 publications

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“…The gravimetric energy density of 1 ⊃AB 1.0 is 28.4 J g –1 , and the volumetric energy density based on the unit cell parameters of the tetragonal np phase equates to 33 MJ m –3 . Both of these values are comparable to some organometallic layered perovskite SS-PCMs − but are lower than organic polymer-based SS-PCMs, which can exhibit phase transition enthalpies in excess of 100 J g –1 . The phase transition temperature of 162 °C for the higher loaded samples is higher than transition temperatures for organometallic layered perovskite SS-PCMs − but significantly lower than fully inorganic metal-based SS-PCMs .…”

Section: Results and Discussionmentioning

confidence: 63%

Long-Term Solar Energy Storage under Ambient Conditions in a MOF-Based Solid–Solid Phase-Change Material

2020

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This paper demonstrates a metal–organic framework (MOF) containing photoswitches within the pores as a hybrid solar thermal fuel (STF) and solid–solid phase-change material (ss-PCM). A series of azobenzene-loaded MOFs were synthesized with the general formula Zn2(BDC)2(DABCO)(AB) x (BDC = 1,4-benzenedicarboxylate, DABCO = 1,4-diazabicyclo[2.2.2]octane, AB = azobenzene, where x = 1.0, 0.9, 0.5, 0.3), herein named 1⊃AB1.0, 1⊃AB0.9, 1⊃AB0.5, and 1⊃AB0.3 respectively. X-ray powder diffraction, solid-state NMR, and density functional theory calculations were used to explore in detail the structural changes of the host framework that take place upon loading with the AB guest molecules. Differential scanning calorimetry measurements reveal a reversible phase change, which is absent from the evacuated framework. Upon irradiation with 365 nm light, 40% of the AB guests converted from the trans to the higher-energy cis isomeric form in 1⊃AB1.0. The energy stored within the metastable cis isomers is released upon heating and balances the endotherm associated with the phase transition. However, the exotherm associated with the phase transition is retained upon cooling, resulting in a net energy release over a full heating–cooling cycle. The maximum energy density is observed for the fully loaded composite 1⊃AB1.0, which releases 28.9 J g–1. In addition, the cis-AB guests in this composite showed negligible thermal reconversion during 4 months at ambient temperature, with an estimated energy storage half-life of 4.5 years. Further development of MOF-based STF-ss-PCMs could lead to applications for solar energy conversion and storage, and thermal management.

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Section: Results and Discussionmentioning

confidence: 63%

Long-Term Solar Energy Storage under Ambient Conditions in a MOF-Based Solid–Solid Phase-Change Material

2020

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“…17 Some other reports have just been published regarding the IL surfactant applications. 18,19 Different measurement technologies were used to obtain the needed surface activities and thermodynamics functions, such as a small-angle neutron scattering (SANS), 13,20 dynamic light scattering (DLS) and viscosity measurements, 17 conductivity, 12,21,22 surface tension measurements, 23 as well different analytical methods, FT-IR, 3 UV-visible spectrum, 22,24 uorescence spectroscopy, 4,22,25,26 isothermal titration calorimeter 25 and NMR technology. 27,28 Apart from the self-assemblies and applications of ILs surfactants in various elds, the aggregation behavior of 1-alkyl-3-methylimidazolium (C n mim + ) in water has been presented by many research groups.…”

Section: Introductionmentioning

confidence: 99%

Surface adsorption and thermodynamic properties of mixed system of ionic liquid surfactants with cetyltrimethyl ammonium bromide

Wang

2017

RSC Adv.

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“…The use of ILs as a supplementary electrolyte or reaction fluid in electrochemical processes has influenced research in recent decades [16].For the iontransportation in polymers, three parameters, such as ionic mobility, carrier density, and diffusion coefficient were found important [17]. The present study employed the Trukhan model to analyse the ion transport parameters of polyvinyl formal (PVFM), ionic liquid 1 ethyl-3methyl imidazolium tyslate (EMImT) as filler.…”

Section: Introductionmentioning

confidence: 99%

Estimation of ion transport parameters in PVFM-based solid polymer electrolyte using Trukhan model

Pandey,

Dwivedi,

Sanjay

et al. 2024

Ionics

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Biosynthetic route for the synthesis of nanoparticles involving fossil extract is a modest eco-friendly process, the study focused on a relatively new class of functional materials known as polymerized ionic liquids The synthesized nanoparticles were then characterized through UV-Visible, FTIR and X-ray diffractionspectroscopy.Nanoparticles incorporated in polymers providing an exciting base for newer technology for the development of cost effective electrochemical and devices. Poly (vinyl alcohol) (PVAM) is one of the eco-friendly semi-crystalline polymers which has inter-and intra-molecular hydrogen bonds, whose degree is greatly dependent on the texture of the polymer. We have fabricated a naturally plasticized nanopolymer electrolyte membrane with high ionic conductivity using nano MMT incorporated in PVAM. Randomly interwoven nano-fibrous structures are generally preferred for electrolyte systems due to their continuous structure. The use of nano-composites provided a better polymer interface as well as the high free volume size, through which molecules transport occurs in nano-composite membrane matrix. The advantage of a surface comprised of ultra-fine, continuous nano fibres naturally becomes highly porous. Nano composite membrane due to its high porosity becomes a major responsive factor to enhance the ionic conductivity. We have considered a comparative study of these fabricated nano-composites. The structural behaviour of the polymer nano-composite membrane was investigated by XRD, FTIR, optical microscopy and scanning electron microscopic technique. XRD curve revealed the amorphous nature of membrane, which is favourable for the better conduction and sensing behaviour, as the conductivity-frequency plots showed the Universal power law. The asymmetric shape of the Dielectric relaxation plots given a strong evidence of low frequency dispersion and deviation from the pure Debye behaviour.

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Thermophysical properties of aqueous solutions of tetraalkylphosphonium based ionic liquids at different temperatures and atmospheric pressure

Cited by 17 publications

References 42 publications

Long-Term Solar Energy Storage under Ambient Conditions in a MOF-Based Solid–Solid Phase-Change Material

Long-Term Solar Energy Storage under Ambient Conditions in a MOF-Based Solid–Solid Phase-Change Material

Surface adsorption and thermodynamic properties of mixed system of ionic liquid surfactants with cetyltrimethyl ammonium bromide

Estimation of ion transport parameters in PVFM-based solid polymer electrolyte using Trukhan model

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