Improvement of insulation effectiveness of natural rubber by adding hydroxyl-functionalized barium titanate nanoparticles

González, Neudys; Riba, Jordi-Roger; Custal, Maria dels Angels; Armelín, Elaine

doi:10.1109/tdei.2017.006176

Cited by 10 publications

(8 citation statements)

References 45 publications

(55 reference statements)

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“…As verified in the experiments and reported in the literature, inorganic nano-particles are more suitable than homogeneous inorganic micro-particles for introduction into the polymer matrix to restrain the initiation and propagation of electrical trees in the corona condition [30]. Based on the initiation and propagation mechanisms of electrical trees presented in this paper, the corresponding reasons can be precisely clarified.…”

Section: Resultssupporting

confidence: 63%

Investigation of the Propagation of Electrical Trees in a Polymer Matrix in the Corona Condition

2018

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In a corona environment, the initiation and propagation of electrical trees in a polymer matrix originate from the field enhancement effect. Driven by the macroscopic alternating electric field, a weak alternating current (AC) was passed through the decomposition channel of an electrical tree, and a small amount of alternating electric quantity was present on the tip of the electrical tree, resulting in an enhanced local electric field around the tip of the electrical tree. The emissions of electrons accelerated in the enhanced local electric field resulted in the decomposition of the polymer material, stimulating the propagation of the electrical tree. When inorganic nano-particles with high corona resistibility were introduced into the polymer matrix, the nano-particles were aggregately deposited as the polymer material decomposed. The decomposition channel of the electrical tree was blocked and the current passing through the decomposition channel was shut off, eliminating the enhanced local electric field. As a result, the propagation of electrical trees was restrained and an improved corona resistibility was achieved for the polymer/nano-particles composite material.

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Section: Resultssupporting

confidence: 63%

Investigation of the Propagation of Electrical Trees in a Polymer Matrix in the Corona Condition

2018

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“…The perovskite functionalization with hydrogen peroxide (H2O2) was followed by FTIR and the effectiveness of the hydroxylation reaction was previously reported on our recent work. [37] The presence of BaTiO3-OH nanoparticles on the structure of NR films was also evaluated by FTIR spectroscopy (Figure 1). The main absorption bands correspond to the polymer matrix (NR), which are at 3045 cm −1 (=CH stretching), 2963 cm −1 (C−H stretching of CH3), 2856 cm −1 (C−H stretching of CH2 and CH3), 1664 cm −1 (C=C stretching), 1449 cm −1 (C−H bending of CH2), 1376 cm −1 (C−H bending of CH3), and 837 cm −1 (C=CH wagging) (Figure 1a).…”

Section: Evaluation Of the Presence Of Batio 3 -Oh On Nr Filmsmentioning

confidence: 99%

“…In Figure 1b, it was also observed that the absorption bands at 1447 cm -1 and 1000 cm -1 increased with the high content of filler load, since they are related to the residual barium carbonate (BaCO3) compound usually observed in BaTiO3 NPs, [38,28] and the -OH bending vibrations of functionalized BaTiO3 particles, respectively. [37] Additionally to FTIR analysis, XRD has been demonstrated that perovskite ceramic particles were successfully incorporated to the polymer matrix (Figure 2). The diffraction model shows that BaTiO3-OH functionalized has very sharp peaks, thus indicating a crystalline structure, whereas unmodified NR has a broad peak between 10º and 30º, indicating mostly amorphous phase.…”

Section: Evaluation Of the Presence Of Batio 3 -Oh On Nr Filmsmentioning

confidence: 99%

“…Therefore, the NR/BaTiO3 composites with pristine perovskite nanoparticles seem to exhibit the enhanced electrical properties for manufacturing insulating devices over the hydroxylated-BaTiO3 system. The electrical behavior of NR/BaTiO3-OH in dc polarization tests (positive and negative polarity) is reported elsewhere [37].…”

Section: Comparison Of Electric Breakdown Strength Between Functionalized and Nonfunctionalized Batio 3 Content Inside Vulcanized Nrmentioning

confidence: 99%

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Dielectric response of vulcanized natural rubber containing BaTiO3 filler: The role of particle functionalization

González

Custal²,

Tomara

et al. 2017

European Polymer Journal

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Natural rubber (NR) nanocomposites have been prepared with hydroxylated barium titanate filler (BaTiO3-OH), employing emulsion polymerization followed by vulcanization process. The addition of barium titanate, a compound with high dielectric permittivity, was envisaged to increase the insulating properties of NR films, thereby reducing the electrical stress and the possibility of undesired arcing on their surfaces. The content of perovskite particles greatly affected both, the mechanical and the electrical properties, of the vulcanized films. It was observed that the optimum functionalized nanoparticle concentration is around 0.25-0.50 phr, range in which the elongation of break was maintained between 874-935 % and the tensile strength was between 4.40-4.80 MPa; whereas the dielectric permittivity (ε') is slightly lower than the pristine NR or the NR compounded with high content of BaTiO3 nanoparticles. The dielectric study revealed the presence of two dielectric relaxation modes: (i) glass to rubber transition (α-relaxation) and (ii) interfacial polarization (IP), known as Maxwell−Wagner−Sillars (MWS) polarization. The comparison between small concentrations of non-functionalized and functionalized BaTiO3 inside NR polymeric films lead to the conclusion that the dielectric breakdown strength is high for non-functionalized fillers, supposedly due to less IP polarization phenomena.

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“…After each test, the sample was mixed to average the concentration of the admixture in the sample. However, the formation of such aggregations during the measurement is likely to reduce the electrical strength of the liquid as suggested in article [24,25] with research in solid dielectrics doped with nanoparticles. In this situation, the nanoparticles tend to be in contact with each other, thus forming a continuous assembly.…”

Section: Resultsmentioning

confidence: 99%

Electrical Strength of Natural Esters Doped by Iron Nanopowder in a Hydrophobic Carbon Shell

Nagi¹,

Płużek²

2020

Materials

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The paper presents the results of measurements of electrical strength of Midel 1204 natural ester doped with iron nanopowder in a hydrophobic carbon shell. The research was conducted for different concentrations of the dopant. The samples were prepared in the High Voltage Technique Laboratory. After mixing, they were tightly closed, and the first measurements were taken after 5 weeks of dissolution of the dopant in liquid. The tests were repeated after another 2 weeks and 3 weeks of dissolution of nanoparticles. An increase in both mean and maximum breakdown voltage was shown for the tested liquid mixtures. The concentration for which the value of electrical strength begins to decrease was indicated. It was also shown that a longer time of dissolution of nanoparticles causes an increase in the electric strength value for the tested samples.

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Improvement of insulation effectiveness of natural rubber by adding hydroxyl-functionalized barium titanate nanoparticles

Cited by 10 publications

References 45 publications

Investigation of the Propagation of Electrical Trees in a Polymer Matrix in the Corona Condition

Investigation of the Propagation of Electrical Trees in a Polymer Matrix in the Corona Condition

Dielectric response of vulcanized natural rubber containing BaTiO3 filler: The role of particle functionalization

Electrical Strength of Natural Esters Doped by Iron Nanopowder in a Hydrophobic Carbon Shell

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