Correlating the breakdown strength with electric field analysis for polyethylene/silica nanocomposites

Lau, Kwan Yiew; Piah, M. A. M.; Ching, Kuan Yong

doi:10.1016/j.elstat.2016.12.021

Cited by 13 publications

(6 citation statements)

References 43 publications

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“…This result agreed with the work of K.Y.Lau [8] which clarified that higher permittivity values within interphase result in more distorted electric field distribution and negatively affect the breakdown strength of the nanocomposites. As less filler loading is added to the HDPE, the separation distance between the particles increases and further away from each other which results in a less distorted electric field in the HDPE-NR biocomposites.…”

Section: Discussionsupporting

confidence: 92%

Analysis of Electric Field for HDPE-NR Biocomposite using Finite Element Method

Tong

Jamail

Kandar

et al. 2020

Periodicals of Evolution in Electrical and Electronic Engineering 2020/1

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In developing future electrical networks, it is crucial to develop new alternatives insulating materials which can improve the performance of the next generation high voltage cables. The high electric field reduces the resistance of solid insulation and causes partial discharge occurs through the impurities in a dielectric where this phenomenon causes ageing to the dielectric and ultimately leads to breakdown. Thus, this paper seeks to analyse the electric field intensity of High Density Polyethylene (HDPE) when added with 10%, 20% and 30% of different types of bio-filler such as coconut coir fibre, pineapple leaves fibre, and oil palm empty fruit bunch. This can be achieved by creating a two-dimensional (2D) axisymmetric electrostatic model by using the Finite Element Method Magnetics (FEMM) 4.2 software. The results showed that the inclusion of bio-filler in HDPE increased the maximum electric field intensity when compared with unfilled HDPE. The electric field intensity also varied with the different percentages loading of biocomposite and their permittivity. As a result, the maximum electric field intensity was much lower for HDPE added with a 10% loading of the oil palm empty fruit bunch. Hence, oil palm empty fruit bunch was the best composition as it tends to improve the dielectric properties since it has a lower electric field intensity at the top sphere electrode as compared to other compositions.

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Section: Discussionsupporting

confidence: 92%

Analysis of Electric Field for HDPE-NR Biocomposite using Finite Element Method

Tong

Jamail

Kandar

et al. 2020

Periodicals of Evolution in Electrical and Electronic Engineering 2020/1

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“…The incorporation of nanosilica is widely reported to decrease the AC and DC breakdown strength of polymers [73][74][75][76][77][78][79][80]. However, there are some reports indicating no change [81,82] or even improvement on the breakdown strength [83][84][85].…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Electrical Breakdown Properties of Clay-Based LDPE Blends and Nanocomposites

Eesaee

David

Demarquette

et al. 2018

Journal of Nanomaterials

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Microstructure and electrical breakdown properties of blends and nanocomposites based on low-density polyethylene (LDPE) have been discussed. A series of LDPE nanocomposites containing different amount of organomodified montmorillonite (clay) with and without compatibilizer have been prepared by means of melt compounding. Two sets of blends of LDPE with two grades of Styrene-Ethylene-Butylene-Styrene block copolymers have been prepared to form cocontinuous structure and host the nanoreinforcement. A high degree of dispersion of oriented clay was observed through X-ray diffraction, scanning, and transmission electron microscopy. This was confirmed by the solid-like behavior of storage modulus in low frequencies in rheological measurement results. An alteration in the morphology of blends was witnessed upon addition of clay where the transportation phenomenon to the copolymer phase resulted in a downsizing on the domain size of the constituents of the immiscible blends. The AC breakdown strength of nanocomposites significantly increased when clay was incorporated. The partially exfoliated and intercalated clay platelets are believed to distribute the electric stress and prolong the breakdown time by creating a tortuous path for charge carriers. However, the incorporation of clay has been shown to diminish the DC breakdown strength of nanocomposites, mostly due to the thermal instability brought by clay.

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“…Due to the unique bonding between the nanoparticle and polymer chain within the interphase, the interphase can therefore have permittivity values different from that of the nanoparticle and the polymer [6]. For example, the increase in the interphase permittivity can resemble the presence of water within the interphase of nanodielectrics which would otherwise reduce the breakdown strength of nanodielectrics [15]. Meanwhile, the decrease in the interphase permittivity can be as a consequence of nanoparticle surface modification that subsequently restricts polymer molecular chain movement which, if properly engineered, could lead to desirable dielectric properties [4].…”

Section: Discussionmentioning

confidence: 99%

“…The authors concluded that the volume of stressed region and enhancement in field mainly depended on the filler permittivity, and that the enhancement in field at the interphase would reduce the breakdown strength of nanodielectrics. Meanwhile, Cai et al [14] Modelling of nanodielectrics based on polyethylene (polymer) and nanosilica (nanoparticle) has also been carried out previously by Lau et al [15,16] using Finite Element Method Magnetics (FEMM) 4.2 software. From the analysis, the presence of nanoparticle with higher permittivity than that of a polymer was found to distort the electric field intensity surrounding the nanoparticle.…”

Section: Introductionmentioning

confidence: 99%

“…Modelling of nanodielectrics based on polyethylene (polymer) and nanosilica (nanoparticle) has also been carried out previously by Lau et al [15, 16] using Finite Element Method Magnetics (FEMM) 4.2 software. From the analysis, the presence of nanoparticle with higher permittivity than that of a polymer was found to distort the electric field intensity surrounding the nanoparticle.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of nanodielectrics: nanoparticle and interphase effects on electric field distributions

Hashim

Lau

Tan

et al. 2020

IET Nanodielectrics

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Nanodielectrics have been regarded as a class of material system that can provide significantly improved chemical, mechanical and dielectric properties over conventional microcomposites. This is due to the presence of a high volume fraction of the interphase between nanoparticles and polymers. However, precise effects of nanodielectrics are not well understood, leading to difficulties in interpreting the dielectric behaviours of nanodielectrics. In the current work, effects of nanoparticle distributions, interparticle distances, nanoparticle sizes, interphase permittivities and interphase thicknesses on the possible electric field variations within a nanodielectric model have been simulated using Finite Element Method Magnetics (FEMM) 4.2. The results demonstrate that different nanoparticle and interphase configurations lead to different effects on the electric field intensity within the nanodielectric model. Mechanisms leading to changes in dielectric properties based on the observed electric field variations are discussed.

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Correlating the breakdown strength with electric field analysis for polyethylene/silica nanocomposites

Cited by 13 publications

References 43 publications

Analysis of Electric Field for HDPE-NR Biocomposite using Finite Element Method

Analysis of Electric Field for HDPE-NR Biocomposite using Finite Element Method

Electrical Breakdown Properties of Clay-Based LDPE Blends and Nanocomposites

Simulation of nanodielectrics: nanoparticle and interphase effects on electric field distributions

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