Influence of environmental factor on hydrophobicity transfer of silicone rubber used for outdoor insulation

Zhu, Yong; Zhang, Xiaorong; Fang, Jiang

doi:10.23919/iseim.2017.8088683

Cited by 4 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From hydrophobicity pattern, it is elaborated that HSs maintain their hydrophobicity for a long time, whereas the SV sample losses its hydrophobicity more quickly or completely if exposed to the environmental conditions for longer period of time. The long term and permanent loss of hydrophobicity in silicone rubber was observed by Du et al 33 and Zhu et al 34 when exposed to the corona stress for a long period of time. However, in our case, the HSs are unable to lose their hydrophobicity after subjecting to long-term laboratory aging thus making them superior.…”

Section: Discussionmentioning

confidence: 80%

“…These stresses affect the insulation at chemical level by breaking the bond and degrading the macromolecular chain to low weight molecules (LWMs). 34 The production of ozone will degrade the insulation by initiating a chain of reactions forming stronger polar groups, such as –OH, –C=O and C-O, pore and tree structures, and cross-linking of molecular structures. The reaction mechanism is given Figure 14.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 80%

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

View full text Add to dashboard Cite

show abstract

“…In another study, the LMW chains diffusion in the contamination layer also increases with exposure to thermal stress, thus resulting in a quick recovery [77]. Applying UV stress on silicone rubber in combination with high temperature can further accelerate the LMW diffusion [78]. In a more recent work [79], silicone rubber composites' hydrophobicity recovery improved with accelerated temperature and high humidity.…”

Section: Effect Of Electrical and Environmental Stresses On Self-heal...mentioning

confidence: 88%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

“…They characterized SiR insulators using Scanning electron microscopy (SEM), Energy dispersive X-ray analysis (EDAX), and Fourier transform infrared analysis (FTIR) and found that the RP technique might be utilized to analyze aged materials. Multiple stressors resulted in the decline in hydrophobicity of the samples were observed which were due to the multiple stresses [ 23 ]. Similarly, the review paper [ 1 ] discusses the impact of different stresses on the performance of SiR insulators.…”

Section: Introductionmentioning

confidence: 99%

Lifetime Estimation and Orientation Effect Based on Long-Term Degradation Analysis of Thermoset and Thermoplastic Insulators

Ullah

Amin

et al. 2022

Polymers

View full text Add to dashboard Cite

Polymeric insulators have replaced ceramic insulators due to their obvious properties like low surface energy, which exhibits good hydrophobic performance, low weight, etc. However, electric utilities have concerns about their long-term performance. In that context, the long-term performance of two different types of polymeric insulators are investigated in this study: thermoset Silicone rubber (SiR) and thermoplastic elastomeric (TPE). Multi-stress aging was performed in the different orientations of both types of polymeric insulators. During multi-stress aging, insulators are exposed to varied loads in both vertical and horizontal orientations, simulating actual service environmental conditions. Experiments were done in a chamber where different types of stresses were simulated, which resembles the weathering conditions of Hattar, Pakistan, which is one of the most polluted industrial zones. Both insulators were stressed in a chamber under the designed weathering conditions for two years and six months at different orientations. Polymeric insulators made of SiR perform better in the vertical position than that in the horizontal position. Furthermore, the experimental results show that both materials are capable in a variety of situations. SiR, on the other hand, performed well due to its high hydrophobicity, which means it is less impacted by contaminants and hence has a longer life and higher service performance than TPE.

show abstract

Influence of environmental factor on hydrophobicity transfer of silicone rubber used for outdoor insulation

Cited by 4 publications

References 5 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

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

Lifetime Estimation and Orientation Effect Based on Long-Term Degradation Analysis of Thermoset and Thermoplastic Insulators

Contact Info

Product

Resources

About