Effects of TiO<sub>2</sub>particles on surface charge of epoxy nanocomposites

Du, B. X.; Zhang, J. W.; Gao, Yu

doi:10.1109/tdei.2012.6215077

Cited by 81 publications

(18 citation statements)

References 32 publications

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“…Du et al studied the effect of TiO 2 nanoparticles on the surface charge decay of epoxy and concluded that charge decay characteristics are highly dependent on the local surface states, that get altered on addition of nanoparticles. They also observed that surface potential decay faster in positive DC voltage as compared to negative DC voltage and also increases with the increase in the wt% of TiO 2 nanofiller [15]. Similar characteristics was observed in the present study.…”

Section: Laser Induced Breakdown Spectroscopysupporting

confidence: 91%

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Neelmani

Suematsu

Sarathi

2020

Mater. Res. Express

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Epoxy nanocomposites with different wt% of alumina was prepared by use of high-speed shear mixer and high-frequency sonicator process, and the electrical and mechanical properties of the materials were investigated. Surface potential variation and trap distribution analysis were carried out with epoxy nanocomposites. Space charge analysis was carried out through Pulsed Electro Acoustic (PEA) technique. The dielectric constant and tan (δ) values of epoxy alumina nanocomposites were measured at different frequencies and temperatures. Contact angle and corona inception voltage caused by a water droplet showed a direct correlation. The viscoelastic properties of the epoxy nanocomposite material were examined through DMA studies. It was concluded that an increase in the supply frequency increases the storage modulus and loss modulus of the epoxy alumina nanocomposites. Glass transition temperature and activation energy increase with an increase in wt% of alumina content in epoxy resin. LIBS analysis indicates that the plasma temperature calculated increases with an increase in the wt% of alumina content in epoxy resin. Also, the measured plasma temperature and hardness of the material showed a direct correlation.

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Section: Laser Induced Breakdown Spectroscopysupporting

confidence: 91%

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Neelmani

Suematsu

Sarathi

2020

Mater. Res. Express

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“…It has been studied in many papers that the amplitude of the charging voltage and charging time by using DC power are two important factors affecting the accumulation and decay of the surface charge [16][17][18]. Considering the repetitive pulse power used in this experiment, different charging time corresponds to different pulse corona discharging times.…”

Section: Effect Of Fluorinationmentioning

confidence: 99%

Effect of direct fluorination on surface charge of polyimide films using repetitive pulsed power

Liu

Guo

2015

IEEE Trans. Dielect. Electr. Insul.

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As one of the basic insulating materials, polyimide films have been widely used in turn to turn insulation and turn to ground insulation in wind turbine generators. However, the pulse voltage from the converter often causes overvoltage and localized high electrical field in the insulation system. Surface charge could affect the dielectric property and cause the breakdown of insulation. Direct fluorination is a method to modify the surface layer of the polymers without changing the bulk properties. As a result of the fluorination, hydrogen atoms are replaced by the fluorine atoms and the component of the polymer surface is changed, which can influence the surface charge accumulation and affect the electrical properties. The experiment in this paper was focused on the effect of direct fluorination on surface charge of polyimide films under pulse voltage. The polyimide films with the fluorination time of 15, 30, 45 and 60 min were prepared, together with the unfluorinated one as a comparison. Surface charging was performed by corona discharging using repetitive pulse power at the temperature of 25 °C with the relative humidity of ~45%. The rising time of the pulse was 25 μs and the frequency was set at 200, 400, 600 and 1000 Hz, respectively. The surface charge decay was measured using a specific probe coupled with an electrostatic voltmeter. The results showed that the surface charge behavior was affected by the fluorination, corona discharging time, pulse voltage amplitude and frequency. Index Terms -Polyimide film, direct fluorination, repetitive pulse, corona discharge, surface charge, trap. Boxue Du (M'00-SM'04) received the M.E. degree in electrical engineering from Ibaraki University and the Ph.D. degree from Tokyo University of A&T.

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“…Du et al reported the effect of nanofiller concentration on the surface charge accumulation and decay of epoxy/TiO 2 , epoxy/BN and polyimide/Al 2 O 3 nanocomposites. Charge dynamics were found to depend on localized surface states, the characteristics of which were altered by the nanoparticles [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface

Liu¹,

Li²,

Du³

2016

Journal of Electrical Engineering and Technology

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-The accumulation and decay of surface charge on silicone rubber (SiR)/SiO 2 nanocomposites under a unipolar corona discharge field was investigated. The effect of the weight ratio of SiO 2 nanoparticles from 0.1 to 0.7 wt.% was studied. Attenuated total reflection infrared spectra of the SiR/SiO 2 nanocomposites indicated that the SiO 2 nanoparticles chemically and physically interacted with the SiR matrix. This facilitated the SiR chains in restricting the injection of surface charge into the bulk nanocomposite. SiR composites containing SiO 2 nanoparticles (especially that containing 0.1 wt.% SiO 2 ) exhibited significantly reduced surface discharge. This approach may have application in outdoor SiR electrical insulators.

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Effects of TiO₂particles on surface charge of epoxy nanocomposites

Cited by 81 publications

References 32 publications

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Effect of direct fluorination on surface charge of polyimide films using repetitive pulsed power

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface

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Effects of TiO2particles on surface charge of epoxy nanocomposites

Cited by 81 publications

References 32 publications

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Investigation on space charge dynamics and mechanical properties of Epoxy Alumina nanocomposites

Effect of direct fluorination on surface charge of polyimide films using repetitive pulsed power

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO2Nanocomposite Surface

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Effects of TiO₂particles on surface charge of epoxy nanocomposites

Kinetics of Charge Accumulation and Decay on Silicone Rubber/SiO₂Nanocomposite Surface