A Comparative Study on Electrical Tree Growth in Silicone Rubber Containing Nanoalumina and Halloysite Nanoclay

Hafiz, M.; Fairus, M.; Mariatti, M.; Jamil, Mohamad Kamarol Mohd

doi:10.1109/access.2019.2899607

Cited by 9 publications

(7 citation statements)

References 30 publications

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“…Considering the advantages of nanocomposite dielectrics, however, attention still needs to be paid to the degradation of material properties in practical applications. One of the most noticeable problems is the aging The associate editor coordinating the review of this manuscript and approving it for publication was Xiao-Sheng Si . under the comprehensive effect of multiple factors [9]- [11], which will affect the service lifespan of power equipment and may bring additional operation and maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nano-Clay Filler on the Thermal Breakdown Mechanism and Lifespan of Polypropylene Film Under AC Fields

et al. 2020

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The wide application of nanocomposites in the insulation system has greatly contributed to the performance improvement of power equipment. However, nano fillers are not omnipotent for improving the properties of composite dielectrics. In some situations, nano-modified materials are in fact a compromise of improving some performance features while sacrificing others. In this work, the breakdown characteristics and time-to-failure of polypropylene film with nano-clay fillers have been evaluated under combined thermal stress and AC electric fields. Experiments on plain polypropylene (PP) samples have also been carried out under the same test conditions as control. Test results indicated that the time-to-failure of the samples with nano-clay filler was shorter than those without nano filler, which is different from the previous experience. SEM and EDS analyses were conducted to study how the failure mechanism had taken place in both plain polypropylene and the nano-clay filled polypropylene. The failure phenomenon in these materials can be explained by molecular thermodynamics. The main reason for the premature thermal breakdown of PP nanocomposite is essentially due to the weak coupling between nano-clay filler and polymer matrix. Finally, suggestions are proposed for nano modification methods and lifespan prediction models of composite dielectrics. INDEX TERMS Electrical insulation, thermal breakdown, polypropylene film, nanocomposites, dielectrics, time-to-failure, aging.

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Section: Introductionmentioning

confidence: 99%

Effect of Nano-Clay Filler on the Thermal Breakdown Mechanism and Lifespan of Polypropylene Film Under AC Fields

et al. 2020

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“…On the other hand, in the field of dielectric polymers, most of the existing studies have focused on improving breakdown strength and thermal stability, [4] modulating dielectric constant, [52] reducing dielectric loss [1,53] and exploring other functionalities. [18,54,55] Research on electrical tree damage has been limited to improving the tree inception voltage and restraining the tree propagation by adding voltage stabilizers, [56,57] degradation inhibitors, [58] nano-/micro-scale fillers, [59,60] etc., rather than healing the damage or recovering the insulating property. After a long period of time's exploration and development, recently, self-healing of electrical tree damage and complete restoration of insulating properties in bulk dielectric polymers were attained.…”

Section: Introductionmentioning

confidence: 99%

Self‐Healing of Electrical Damage in Polymers

Yang

Dang

et al. 2020

Advanced Science

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Polymers are widely used as dielectric components and electrical insulations in modern electronic devices and power systems in the industrial sector, transportation, and large appliances, among others, where electrical damage of the materials is one of the major factors threatening the reliability and service lifetime. Self‐healing dielectric polymers, an emerging category of materials capable of recovering dielectric and insulating properties after electrical damage, are of promise to address this issue. This paper aims at summarizing the recent progress in the design and synthesis of self‐healing dielectric polymers. The current understanding to the process of electrical degradation and damage in dielectric polymers is first introduced and the critical requirements in the self‐healing of electrical damage are proposed. Then the feasibility of using self‐healing strategies designed for repairing mechanical damage in the healing of electrical damage is evaluated, based on which the challenges and bottleneck issues are pointed out. The emerging self‐healing methods specifically designed for healing electrical damage are highlighted and some useful mechanisms for developing novel self‐healing dielectric polymers are proposed. It is concluded by providing a brief outlook and some potential directions in the future development toward practical applications in electronics and the electric power industry.

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“…Nanodielectrics with filler contents of several wt % have been proven to have a high electrical tree-inhibiting ability [11,12,13,14]. Traditional inorganic nanoparticles have also been used to improve the tree resistance of SIR, including silica (SiO 2 ) and alumina (Al 2 O 3 ) [15,16,17]. With a high enough content (lower than 10 wt %) of nanoparticles, trees are considerably inhibited [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…Traditional inorganic nanoparticles have also been used to improve the tree resistance of SIR, including silica (SiO 2 ) and alumina (Al 2 O 3 ) [15,16,17]. With a high enough content (lower than 10 wt %) of nanoparticles, trees are considerably inhibited [15,16,17]. The multi-core model proposed by Tanaka et al explained the inhibition effect of nanoparticles on electrical trees [18].…”

Section: Introductionmentioning

confidence: 99%

Inhibition Effect of Graphene Nanoplatelets on Electrical Degradation in Silicone Rubber

Han

et al. 2019

Polymers

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Silicone rubber (SIR) is widely used as an insulation material in high voltage cable accessories. Electrical tree is a typical electrical degradation and is easily initiated because of the distorted electric field. In this study, graphene nanoplatelets at contents of 0.001–0.010 wt % (0.00044–0.00436 vol %) were added into SIR to improve the electrical tree inhibiting ability. Scanning electron microscopy, conductivity and surface potential decay tests were conducted to analyze the characteristics of graphene/SIR nanocomposites. The typical electrical treeing experiment was employed to observe the electrical tree inhibition of graphene in SIR. The results show that graphene nanoplatelets were well dispersed in SIR. The conductivity was higher after the addition of graphene nanoplatelets, and the trap distribution was affected by graphene nanoplatelets. The tree was changed from a bush-branch structure to a bush structure after the addition of graphene. Tree inception voltage improved and reached the highest mean value at 0.003 wt %. The tree length was inhibited at 0.001 to 0.007 wt % and the lowest tree length occurred at 0.005 wt %.

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A Comparative Study on Electrical Tree Growth in Silicone Rubber Containing Nanoalumina and Halloysite Nanoclay

Cited by 9 publications

References 30 publications

Effect of Nano-Clay Filler on the Thermal Breakdown Mechanism and Lifespan of Polypropylene Film Under AC Fields

Effect of Nano-Clay Filler on the Thermal Breakdown Mechanism and Lifespan of Polypropylene Film Under AC Fields

Self‐Healing of Electrical Damage in Polymers

Inhibition Effect of Graphene Nanoplatelets on Electrical Degradation in Silicone Rubber

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