Investigation on the electrical, thermal and mechanical properties of silicone rubber nanocomposites

Vinod, Pabbati; Desai, Belaguppa Manjunath Ashwin; Sarathi, R.; Kornhuber, Stefan

doi:10.1109/tdei.2019.008205

Cited by 16 publications

(9 citation statements)

References 21 publications

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“…The decay rate is the crucial indicator of surface resistivity and hence the decay rate, as listed out in Tables 4 and 5, of all the samples, were compared. [18] The surface potential of the UnF aged specimen was found to decay faster as compared to UnF unaged specimen under all test conditions. So, it was concluded that aging made the surface of the sample partially conductive.…”

Section: Surface Potential Decay Analysismentioning

confidence: 82%

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Performance evaluation of room temperature vulcanized silicone rubber nanocomposites aged in strong aqueous solutions

Mishra

Paul

Vinod

et al. 2022

Polymer Engineering & Sci

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In the present study moisture absorption behavior of titania (TiO 2 ) and silica (SiO 2 ) doped room temperature vulcanized (RTV) silicone rubber (SR) nanocomposites immersed in deionized water, aqueous sodium chloride (NaCl) and nitric acid (HNO 3 ) solution was investigated. It is realized that the diffusion coefficient of the material is high with nanocomposites compared to virgin RTV SR material. To understand the surface condition of the material and characteristic variation in material properties water droplet-initiated corona inception voltage measurements, atomic force microscopy study, surface potential variation studies, Fourier transform infrared spectroscopy and thermogravimetric analysis was carried out with the virgin and aqueous solution aged specimens. The discharge resistance of the material was analyzed using corona discharge studies. The level of hydrophobicity variations was analyzed through contact angle measurements. The experimental results confirmed that the performance of TiO 2 doped RTV SR nanocomposites is superior to the SiO 2 doped and virgin RTV SR material.

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Section: Surface Potential Decay Analysismentioning

confidence: 82%

“…The decay rate is the crucial indicator of surface resistivity and hence the decay rate, as listed out in Tables 4 and 5, of all the samples, were compared. [ 18 ]…”

Section: Resultsmentioning

confidence: 99%

Performance evaluation of room temperature vulcanized silicone rubber nanocomposites aged in strong aqueous solutions

Mishra

Paul

Vinod

et al. 2022

Polymer Engineering & Sci

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“…Increasing the fumed silica contents is reported to reduce the speed of hydrophobicity recovery of silicone rubber [47]. In another work [48], silicone rubber filled with nano-sized alumina at 1 wt.%, 2.5 wt.%, and 5 wt.% showed a slightly slower recovery rate than unfilled silicone rubber.…”

Section: Effect Of Fillersmentioning

confidence: 99%

Self-Healing Silicones for Outdoor High Voltage Insulation: Mechanism, Applications and Measurements

et al. 2022

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This paper discusses the state of the art in the application of self-healing silicone-based materials for outdoor high-voltage insulation. Both the dynamic behavior of the dimethyl side groups of silicone rubber and the diffusion of a bulk siloxane to maintain low surface energy are respectively reported as intrinsic mechanisms responsible for the self-healing of silicone rubber. Localization, temporality, mobility, and the type of synthesis are the aspects defining the efficiency of the self-healing ability of silicone rubber. In addition, the deterioration of the self-healing ability with filler loaded into silicone rubber insulation housing composites is discussed. Taking the self-healing property into consideration among the other properties of silicone rubber insulators, such as tracking and erosion resistance, can be a useful design practice at the material development stage. Hydrophobicity retention, recovery, and transfer measurements are discussed as useful indicators of the self-healing ability of silicone rubber. Nevertheless, there remains a need to standardize them as design tests at the material development stage. The paper is intended to shed the light on the hydrophobicity recovery, a key material design parameter in the development of silicone rubber outdoor insulating composites, similar to the tracking and erosion resistance.

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“…Furthermore, the polymer matrix is segmented by the addition of nanofillers, and activated oxygen atoms or emitted gases from discharges fail to diffuse into the polymer matrix, which decreases the erosion area [54]. Vinod et al [55] investigated the electrical, thermal, and mechanical nature of SiR nanocomposites filled with nano-Al 2 O 3 and found a significant improvement in corona ageing resistance under both DC and AC voltages. Owing to the corona ageing of the samples, hydrophobicity recovery was reduced a bit, and damage due to water droplet discharges were found to be severe under positive DC compared with that of negative DC and AC voltages.…”

Section: Impact Of Nanodielectrics On Partial Discharge Resistancementioning

confidence: 99%

“…Vinod et al. [55] investigated the electrical, thermal, and mechanical nature of SiR nanocomposites filled with nano‐Al 2 O 3 and found a significant improvement in corona ageing resistance under both DC and AC voltages. Owing to the corona ageing of the samples, hydrophobicity recovery was reduced a bit, and damage due to water droplet discharges were found to be severe under positive DC compared with that of negative DC and AC voltages.…”

Section: Impact Of Nanodielectrics On Partial Discharge Resistancementioning

confidence: 99%

Electrical discharge resistance of polymeric nanocomposites

Banerjee

Saini

2021

IET Nanodielectrics

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The trend of choosing insulating materials has changed in the past few decades, and a considerable shift has occurred from conventional ceramic to non-ceramic insulating materials. The addition of inorganic fillers has greatly improved the thermal conductivity, discharge resistance, hydrophobicity recovery, and vandalism-resistance properties of polymeric insulating materials. Since the beginning of the present century, the field of nanomaterial research has gained much attention. Several studies have been conducted to investigate and analyze polymer nanocomposites by adding nanoparticles of varying size and concentration as fillers. The aim is to improve the characteristics and reformation of thermal, electrical, and mechanical properties of existing polymeric insulation materials. However, certain inconsistencies are prevalent with results obtained for polymer nanocomposites. A comprehensive review is presented based on available literature focussing on the advancement from polymeric insulating materials to polymeric nanocomposites and its impact on partial discharge resistance, surface charging, and tracking and erosion resistance. It is observed that the weight percent and dispersion of nano-or micro-sized particles into the base polymer matrix governs the performance of polymer composites. At higher filler loading, resistance to partial discharge and tracking and erosion decreases as a result of the agglomeration of fillers, whereas resistance to surface charge accumulation increases at higher filler loading because the formation of shallow traps increases the charge decay rate. It is suggested that when both micro-and nanofillers are mixed in proper proportion, micro-nano hybrid composites provide better performance than composites filled with only nano-or microfillers.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Investigation on the electrical, thermal and mechanical properties of silicone rubber nanocomposites

Cited by 16 publications

References 21 publications

Performance evaluation of room temperature vulcanized silicone rubber nanocomposites aged in strong aqueous solutions

Performance evaluation of room temperature vulcanized silicone rubber nanocomposites aged in strong aqueous solutions

Self-Healing Silicones for Outdoor High Voltage Insulation: Mechanism, Applications and Measurements

Electrical discharge resistance of polymeric nanocomposites

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