Dielectric study of propylene carbonate/toluene mixtures and dipole moment of supercooled propylene carbonate

Jorat, L.; Noyel, G.; Huck, J.

doi:10.1109/14.83700

Cited by 19 publications

(12 citation statements)

References 10 publications

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“…Many of the simple component liquids show a Cole−Davidson (C−D) type (α = 0 in eq 1) of relaxation in the supercooled regime. ,,, Deviations from α = 0 in eq 1 are found in some organic liquids which have some contribution to the polarization from the intramolecular rotation. , Similarly in polymers, a nonzero α results from different segmental motions . A nonzero α is also found in binary liquids in the supercooled region. , Clear deviation from C−D type behavior is also seen in some aqueous solutions even at room temperature. , …”

Section: Discussionmentioning

confidence: 93%

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Phase Behavior of the Supercooled Aqueous Solutions of Dimethyl Sulfoxide, Ethylene Glycol, and Methanol As Seen by Dielectric Spectroscopy

Murthy

1997

J. Phys. Chem. B

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The dielectric behavior of the supercooled aqueous solutions of dimethyl sulfoxide (DMSO), ethylene glycol (EG), and methanol (MeOH) has been examined in the frequency range 106−10-3 Hz and in the x m range of 0.19−0.40, 0.25−0.85, and 0.50−0.85, respectively, where x m is the mole fraction of the second component. Differential scanning calorimetric measurements have also been carried out on the samples. At temperatures above the glass transition temperature (T g), it was found that the Hevriliak−Negami relaxation function is appropriate to describe the data. The “apparent” distribution in relaxation times increases with increasing water content and also on lowering the temperature. But at temperatures just above T g, an Arrhenius branch of considerable polarization and with an activation energy of ∼21.5 kJ/mol separates out to continue to the sub-T g region, which more or less disappears around x m = 0.33 in DMSO solutions and around x m = 0.50 in EG solutions. It is suggested that the complexes of 2:1 (in DMSO solutions) and 1:1 (in EG solutions) are present in the liquid that are thermolabile and exist in an undissociated state only near T g, and the sub-T g process is due to the relaxation of water molecules. No evidence of complex formation is found in MeOH solutions.

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Section: Discussionmentioning

confidence: 93%

“…45 A nonzero R is also found in binary liquids in the supercooled region. 29,46 Clear deviation from C-D type behavior is also seen in some aqueous solutions even at room temperature. 37,47 As shown in Figure 3a,b, in the solutions of DMSO and EG, large deviations from R ) 0 are noticed, which increase with increasing water content.…”

Section: Discussionmentioning

confidence: 98%

Phase Behavior of the Supercooled Aqueous Solutions of Dimethyl Sulfoxide, Ethylene Glycol, and Methanol As Seen by Dielectric Spectroscopy

Murthy

1997

J. Phys. Chem. B

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“…The excellent dispersion of GO in PC thus may not be caused by electrostatic repulsionOat least not as far as the zeta potential of the suspension is an indicator of such repulsion. The high dipole moment of PC, 5.0 D, 32 could play a role in dispersing graphene oxide platelets at pH 3; 14 the Hansen, and perhaps other, solubility parameters of PC may also be factors. 15 To evaluate the degree of exfoliation of the GO into graphene oxide platelets, a suspension with 0.05 mg/mL concentration (diluted from 1 mg/mL) was dropped onto Si substrates and mica substrates followed by drying and inspection with scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively.…”

Section: Resultsmentioning

confidence: 99%

Exfoliation of Graphite Oxide in Propylene Carbonate and Thermal Reduction of the Resulting Graphene Oxide Platelets

et al. 2010

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Graphite oxide was exfoliated and dispersed in propylene carbonate (PC) by bath sonication. Heating the graphene oxide suspensions at 150 degrees C significantly reduced the graphene oxide platelets; paper samples comprising such reduced graphene oxide platelets had an electrical conductivity of 5230 S/m. By adding tetraethylammonium tetrafluoroborate (TEA BF(4)) to the reduced graphene oxide/PC slurry and making a two-cell ultracapacitor, specific capacitance values of about 120 F/g were obtained.

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“…Introduction: Propylene carbonate (PC), which has been used as a dielectric in high-performance lithium batteries, shows appealing prospects in the compact pulsed power sources because of its large permittivity, high dielectric strength and broad operating temperature range [1][2][3]. Compared with the traditional polar liquids used in pulse forming line as an energy storage medium, such as deionised water and water/ethylene glycol mixtures [4][5][6][7][8][9], PC owns relatively high chemical stability and can keep the resistivity above 10 MΩ cm for more than six months in pulse forming line, which can be used for microsecond charging with less energy loss [10,11].…”

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confidence: 99%

Trapping and scattering effect of charge carriers on impulse breakdown characteristics of nano‐fluids

Zhang

Hou³

et al. 2018

Micro & Nano Letters

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Propylene carbonate (PC)-based nano-fluids (NFs), containing only 2 ppm TiO 2 nano-particles, exhibit more than 60% higher negative impulse breakdown voltage than that of base liquid. It is found that the resistance of the test gap containing PC remains basically invariable when subjected to high amplitude voltage before the development of electrical breakdown. However, for the NF case, the resistance increases by a factor. Moreover, compared with PC, the streamers in NFs are more complex branched. These experimental results indicate that the charge carriers in NFs can be effectively captured and scattered by nano-particles, which is verified by means of the thermally stimulated current method.

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Dielectric study of propylene carbonate/toluene mixtures and dipole moment of supercooled propylene carbonate

Cited by 19 publications

References 10 publications

Phase Behavior of the Supercooled Aqueous Solutions of Dimethyl Sulfoxide, Ethylene Glycol, and Methanol As Seen by Dielectric Spectroscopy

Phase Behavior of the Supercooled Aqueous Solutions of Dimethyl Sulfoxide, Ethylene Glycol, and Methanol As Seen by Dielectric Spectroscopy

Exfoliation of Graphite Oxide in Propylene Carbonate and Thermal Reduction of the Resulting Graphene Oxide Platelets

Trapping and scattering effect of charge carriers on impulse breakdown characteristics of nano‐fluids

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