Effective modulation of surface conductivity of epoxy resin insulators by direct fluorination

Liu, Yaqiang; An, Zhenlian; Yin, Qianqian; Zheng, Feihu; Zhang, Yewen

doi:10.1109/icsd.2013.6619675

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…During the surface decay, the charges seems to decay in series of small pulses, and not through a steady-state decay [146,147]. However, this observation is not seen in the work done by Liu et al [113] for the surface potential decay on the surfacefluorinated epoxy resin. This is possibly due to the high sampling rate (every five seconds) used in this experimental setup.…”

Section: Resultscontrasting

confidence: 47%

“…From the cross-section image in Figure 4-3, as well as the top-view images from [113] in Figure 4-4 (the same direct-fluorination treatment from Tongji University were performed on these samples), structural changes in the form of small cracks and bumps can obviously be seen on the surface as the direct-fluorination level increases, as an outcome from the surface roughening process. Surface roughening appears and intensifies with the increase in fluorination level.…”

Section: Parts By Weight Parts By Volumementioning

confidence: 99%

“…It is important to note that this equation is derived from the direct-fluorination treatment prepared using pure fluorine gas at room temperature, slightly different from the treatment conditions being applied in this research. Nevertheless, it is appropriate to say that the Images on surface roughening effect from surface-fluorination treatment on epoxy resin taken from [113]. The appearance of surface cracking appears at higher fluorination temperatures can be due to a rapid increase in molecular volume.…”

Section: Parts By Weight Parts By Volumementioning

confidence: 99%

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Surface fluorinated epoxy resin for high voltage DC application

Mohamad

Chen

Zhang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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Charge build up under high voltage DC is a significant concern in the transmission system as its presence may distort the local electric field. By chemically treat polymeric insulation via directfluorination, and plasma enhanced fluorination process, the charge transport characteristics of the material can be modified. In doing so, excellent surface properties similar to those of fluoropolymers can be attained without compromising the bulk properties of the original polymeric insulation. The change in chemical components at the surface of polymeric insulation should lead to a corresponding change in dielectric properties at the surface and consequently may suppress the occurrences of charge build up. In this research, epoxy resin samples with various surface fluorinating conditions were formulated and treated. The samples then were characterised by SEM and EDX analysis, Raman spectroscopy, and DC surface conductivity measurements. To further explain the effects of fluorination treatment, modelling of the electric field and current density distribution had been carried out. Surface potential decay tests from corona discharge, as well as PEA measurements, show that there is a significant change in decay characteristics with the introduction of surface fluorinated layer. The decay mechanisms responsible for the observed

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Section: Resultscontrasting

confidence: 47%

Section: Parts By Weight Parts By Volumementioning

confidence: 99%

Section: Parts By Weight Parts By Volumementioning

confidence: 99%

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