Performance of silicone rubber composites with SiO<sub>2</sub> micro/nano-filler under AC corona discharge

Nazir, M. Tariq; Phung, B.T.; Hoffman, Mark

doi:10.1109/tdei.2016.7736840

Cited by 82 publications

(34 citation statements)

References 43 publications

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“…41 The reason for the improved properties is the presence of the silanol groups present on the nano-SiO 2 particle, the main part to keep the polymer intact and thus resistant to extreme weathering. 42-43…”

Section: Discussionmentioning

confidence: 99%

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Rashid

Saleem

Amin

et al. 2020

Polymers and Polymer Composites

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Multiple environmental stresses produce complex phenomena of aging in polymeric insulators. The main aim of this research is to investigate the improved aging characteristics of silica (SiO2)/alumina trihydrate (ATH) hybrid samples (HSs) in high-temperature vulcanized rubber. For this purpose, three HSs comprising 20% micro-ATH with 2% nano-SiO2 (S2), 4% nano-SiO2 (S4), 6% nano-SiO2 (S6) along with sample-virgin (SV) are subjected to long-term accelerated aging of 9000 h. A special aging chamber is fabricated for the aging process of samples. The aging characteristics of these samples are investigated by measuring leakage current (LC) and hydrophobicity classification (HC) after every weathering cycle. Similarly, Fourier transform infrared (FTIR) spectroscopy is performed to observe the important structural changes over the entire aging time. The dielectric strength of AC is also performed after every 1000 h of aging. Tracking and erosion resistance and mechanical properties are also investigated before and after aging. From the critical investigation, it is observed that HSs possess improved results in all the conducted tests. S2 has the lowest LC and HC values throughout the aging time. Similarly, S6 described the highest breakdown strength at the end of the accelerated aging. In the case of FTIR, it is analyzed that the important wave numbers remain intact for all the HSs in the accelerated aging environment. The loss percentage in the wave number for SV is higher, compared to the HSs. After performing the tracking and erosion resistance test, HSs have superior performance. For some of the mechanical properties, HSs showed improved values. Thus, from the experimental analysis, it is deducted that the sample S2 offers the highest resistance to the aging conditions, compared to the SV and other HSs.

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Section: Discussionmentioning

confidence: 99%

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Rashid

Saleem

Amin

et al. 2020

Polymers and Polymer Composites

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“…The nano- fillers build a stronger UV shielding layer in the composites due to their large surface area, which reduces the extent of degradation. Table 4 Inter-filler spacing and total surface area of fillers in the samples [25] Composites Inter-filler spacing among micro-fillers, nm…”

Section: Discussionmentioning

confidence: 99%

“…Finally, part B was blended with the matrix at 10:1 ratio and poured into moulds after degassing. The curing was carried out according to the methodology described in [25][26][27][28][29] and samples of thin rectangular plate shape of dimension 100 × 100 × 3 mm 3 were casted for UV weathering testing. As shown in Table 1, four different types of samples were fabricated in this study and for ease of referencing; they were denoted as U-SR, M-SR, MN-SR, and N-SR. To improve the erosion performance, micron-sized particles were added by 40-60 wt% to SR [30].…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

Accelerated ultraviolet weathering investigation on micro‐/nano‐SiO ₂ filled silicone rubber composites

Nazir

Phung

2018

High Voltage

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This study attempts to elucidate whether the addition of micro and/or nano-silica (SiO 2) particles can enhance the resistance of pure polydimethylsiloxane against synergistic effects of UV, temperature and high-voltage stress. Four types of composites (U-SR, M-SR, MN-SR and N-SR) are fabricated by adding micro and/or nano-silica particles and then subjected to multi-stress degradation in a test chamber. Results show that there is an apparent surface discoloration in the form of yellowish pale tint and a significant resistance to hydrophobicity reduction is offered by N-SR and MN-SR followed by M-SR and U-SR. Scanning electron microscopy and surface roughness findings proclaimed that N-SR and MN-SR offer excellent resistance against filler exposure and an increase in surface roughness. There is a minor reduction in absorbance level of Si (CH 3) 2 and Si-O-Si functional groups of composites but interestingly, hydrophilic hydroxyl group absorbance level is found higher in the U-SR comparatively. Furthermore, dielectric response measurements indicate considerable sensitivity to weathering with N-SR and MN-SR giving the lowest dielectric loss. Results indicate that the addition of nano-silica to pure and micro-silica filled SR can enhance its UV weathering resistance considerably by building an effective UV shielding layer.

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“…As the insulator ages and the contamination level on the surface increases, PD activities increase [7]. The occurrence of PD at the insulation surface is one of the causes of polymer chain degradation, resulting in the ageing of the polymeric insulator [8, 9]. The influence of relative humidity, ageing and contamination level on PRPD patterns of PD activities on the polymeric insulator is discussed in [3].…”

Section: Introductionmentioning

confidence: 99%

Distinguishing polymeric insulators PD sources through RF PD measurement

Abedini-Livari

Firuzi

Vakilian

2020

IET Generation, Transmission & Distribution

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Performance of silicone rubber composites with SiO₂ micro/nano-filler under AC corona discharge

Cited by 82 publications

References 43 publications

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Accelerated ultraviolet weathering investigation on micro‐/nano‐SiO ₂ filled silicone rubber composites

Distinguishing polymeric insulators PD sources through RF PD measurement

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Performance of silicone rubber composites with SiO2 micro/nano-filler under AC corona discharge

Cited by 82 publications

References 43 publications

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Long-term aging characteristics of co-filled nano-silica and micro-ATH in HTV silicone rubber composite insulators

Accelerated ultraviolet weathering investigation on micro‐/nano‐SiO 2 filled silicone rubber composites

Distinguishing polymeric insulators PD sources through RF PD measurement

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Performance of silicone rubber composites with SiO₂ micro/nano-filler under AC corona discharge

Accelerated ultraviolet weathering investigation on micro‐/nano‐SiO ₂ filled silicone rubber composites