Densities, viscosities, and refractive indices of the binary systems (PEG200+1,2-propanediol, +1,3-propanediol) and (PEG400+1,2-propanediol, +1,3-propanediol) at (288.15 to 333.15)K and atmospheric pressure: Measurements and modeling

Bajić, Divna M.; Ivaniš, Gorica R.; Višak, Zoran P.; Živković, Emila M.; Šerbanović, Slobodan P.

doi:10.1016/j.jct.2012.07.024

Cited by 91 publications

(60 citation statements)

References 53 publications

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“…Values obtained for PEG 400 present a good agreement with viscosity data reported for poly(ethylene glycols) with mass-average molecular masses ranging from 365 to 400 g·mol −1 [ 55 , 62 , 63 , 68 ]. An average deviation of 1.9% is obtained.…”

Section: Resultssupporting

confidence: 85%

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

et al. 2017

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This study presents new Nano-enhanced Phase Change Materials, NePCMs, formulated as dispersions of functionalized graphene nanoplatelets in a poly(ethylene glycol) with a mass-average molecular mass of 400 g·mol−1 for possible use in Thermal Energy Storage. Morphology, functionalization, purity, molecular mass and thermal stability of the graphene nanomaterial and/or the poly(ethylene glycol) were characterized. Design parameters of NePCMs were defined on the basis of a temporal stability study of nanoplatelet dispersions using dynamic light scattering. Influence of graphene loading on solid-liquid phase change transition temperature, latent heat of fusion, isobaric heat capacity, thermal conductivity, density, isobaric thermal expansivity, thermal diffusivity and dynamic viscosity were also investigated for designed dispersions. Graphene nanoplatelet loading leads to thermal conductivity enhancements up to 23% while the crystallization temperature reduces up to in 4 K. Finally, the heat storage capacities of base fluid and new designed NePCMs were examined by means of the thermophysical properties through Stefan and Rayleigh numbers. Functionalized graphene nanoplatelets leads to a slight increase in the Stefan number.

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Section: Resultssupporting

confidence: 85%

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

et al. 2017

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“…The only set of measurements, with a reported water content (< 0.02 wt%), where we observe larger deviations, is that of Mjalli and Ahmed 69 . Their values are 13-21% lower than our values in the temperature range 293-333 K. 54 (solid, red, up triangle), Sun et al 55 (solid, red, down triangle), Carvalho et al 56 (solid, red diamond), Quijada et al 57 (solid, red, right-pointing triangle); (ii) 1,3-propanediol by Živković and co-workers 49,58,59 (solid, blue pentagon), Moosavi et al 51 (solid, blue square); (iii) 1,4-butanediol by Nain et al 68 (solid, green circle), Moosavi et al 51 (solid, green square), Saleh et al 70…”

Section: Density and Viscosity Measurementscontrasting

confidence: 54%

“…of (a) glycols and (b) DES. Literature data was reported for: (i) ethylene glycol by Zhao et al 54 (solid, red, up triangle), Sun et al 55 (solid, red, down triangle), Carvalho et al 56 (solid, red diamond), and Quijada et al 57 (solid, red, left-pointing triangle); (ii) 1,3propanediol by Živković and co-workers 49,58,59 (solid, blue pentagon), and Moosavi et al 51 (solid, blue square); (iii) 1,4-butanediol by Grineva and Zhuravlev 60 (green bar), Moosavi et al 51 (solid, green square), Czechowski et al 52 (solid, green hexagon), and Yang et al 50 53 (open, red diamond), Shahbaz and coworkers 64,65 (open, red, right-pointing triangle), Abbott et al 66 (open, red pentagon), Ozturk et al 20 (open, red star), and Gajardo-Parra et al 13 (red bubbled circle); (v) DES-A2 by Ozturk et al 20 (open, blue star), and Abbott et al 66 Viscosity data obtained in this work were compared with literature for ethylene glycol, 1,3propanediol, and 1,4-butanediol, as shown in Figure 4(a), and with DES-A, DES-B, and DES-D in Figure 4(b). The agreement with glycol literature data, see Figure 4(a), is on average within 4%, with only 4 data points showing larger deviations of up to -5.6%.…”

Section: Density and Viscosity Measurementsmentioning

confidence: 99%

Viscosity of Choline Chloride-Based Deep Eutectic Solvents: Experiments and Modeling

et al. 2020

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Deep eutectic solvents (DES) have emerged as promising 'green' solvents, but their successful industrial application requires relatively low viscosity. DES prepared from choline chloride and glycols offer such possibility. Viscosity and density are reported for a number of DES obtained by mixing choline chloride and a glycol (ethylene glycol, 1,2-propanediol, 1,3-propanediol, and 1,4-butanediol). The measurements were performed at 101.3 kPa, at temperatures between 293.15 K and 333.15 K, and for different mole ratios of the glycol and choline chloride. The viscosity was measured with a capillary viscometer, while the density was measured by means of a vibrating U-tube densimeter. The density and viscosity data have expanded relative uncertainties of 0.2% and 2.0%, respectively, with a coverage factor of 2. The viscosity of pure glycols was modeled using the extended hard-sphere (EHS) model that has its basis in kinetic theory and the molecular description of the fluid. Each DES was treated as a binary mixture, and the EHS model was used, with a mole average mixing rule, to calculate its viscosity. The measured DES viscosity data were represented with the average absolute deviation of 1.4% and a maximum deviation of 7%.

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“…In determination of g k values, we used the static permittivity (ε s ) and high frequency limiting permittivity (ε ∞ = n D 2 ) values measured in the present study, whereas dipole moment μ = 3.28 D [12], and temperature dependent density values were taken from literature [32]. The g k values of neat PEG200 are found significantly higher than unity (Table 1), which show that there is a parallel dipolar ordering (hydrogen bonded multimers) in the molecular structure of PEG200.…”

Section: Resultsmentioning

confidence: 99%

Effect of ionic contaminants on dielectric dispersion and relaxation processes over static permittivity frequency region in neat liquid poly(ethylene glycol)

Sengwa

Choudhary

Dhatarwal

2016

Journal of Molecular Liquids

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Densities, viscosities, and refractive indices of the binary systems (PEG200+1,2-propanediol, +1,3-propanediol) and (PEG400+1,2-propanediol, +1,3-propanediol) at (288.15 to 333.15)K and atmospheric pressure: Measurements and modeling

Cited by 91 publications

References 53 publications

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

Viscosity of Choline Chloride-Based Deep Eutectic Solvents: Experiments and Modeling

Effect of ionic contaminants on dielectric dispersion and relaxation processes over static permittivity frequency region in neat liquid poly(ethylene glycol)

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