Improved space charge suppression in PP/SEBS nanocomposites by controlling MgO nanoparticles with abundant surface defects

Cheng, Qi; Zha, Jun‐Wei; Zhai, Jin-Tao; Zhang, Dongli; Bian, Xingming; Chen, George; Dang, Zhi‐Min

doi:10.1063/1.5123208

Cited by 17 publications

(9 citation statements)

References 24 publications

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“…Specially, the tensile strength and elongation at break of PP/SEBS blends are also improved by loading 0.5 phr flower‐MgO, showing potential for the optimisation of power cable insulation. They also synthesised MgO nanoparticles with abundant surface defects (C‐MgO) containing a highly effective interface by surface carbonisation, which can realise the enhancement of electrical and mechanical properties with about 0.2 phr doping content [126]. Moreover, multi‐dimensional zinc oxide composite fillers (co‐ZnO) is also used to achieve the suppression of space charge accumulation and the enhancing of breakdown strength [127].…”

Section: Research Status Of Polypropylene Modification Based On Struc...mentioning

confidence: 99%

Eco‐friendly polypropylene power cable insulation: Present status and perspective

Yang

et al. 2023

IET Nanodielectrics

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Environmental protection is the future trend of power equipment development, and is also a research hotspot in the field of power cable insulation in recent years. Due to the excellent electrical properties and recyclability, polypropylene (PP) based composites are regarded as promising insulating materials for eco‐friendly next‐generation power cables. However, the high modulus and hardness of pure PP make it difficult to be directly employed as cable insulations, which needs to be further optimised. General methods of mechanical performance regulation often result in the deterioration of electrical performance, such as breakdown strength, space charge and so on. Therefore, it is recognised that the major challenge impeding practical applications of PP power cable insulation arises from the synergetic regulation of multi‐performances. The multi‐level structures influencing the multi‐performances of PP are introduced by the authors and the researches on the performance enhancement of PP through nanoscale structure regulation in recent years are reviewed in detail. Seven kinds of modification methods including nano‐doping, chemical grafting, in‐suit copolymerisation, heat treatment, nucleating agent, voltage stabiliser and elastomer blending are paid special attention. Based on the full understanding of the research status, the challenges and issues of future research are put forward for eco‐friendly PP power cable insulation.

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Section: Research Status Of Polypropylene Modification Based On Struc...mentioning

confidence: 99%

Eco‐friendly polypropylene power cable insulation: Present status and perspective

Yang

et al. 2023

IET Nanodielectrics

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“…[10][11][12] At present, the modification methods for PP can be divided into two categories: chemical [13][14][15][16] and physical modification. [17][18][19][20][21] Commonly used chemical modifications are copolymerization 13,14 and grafting modification, 15,16 and so on. Huang et al compared the mechanical and electrical properties of six kinds of propylene copolymers and found that the comprehensive performance of ethylene-propylene copolymers are the best.…”

Section: Introductionmentioning

confidence: 99%

The influence and mechanism of elastomer types on electrical and mechanical properties of polypropylene insulation materials for high voltage cables

Li,

Chen,

Liu

et al. 2023

J of Applied Polymer Sci

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Polypropylene (PP) becomes a superior candidate material for new environmentally friendly cable main insulation with its excellent heat resistance, electrical properties, and degradability. However, in practical application, PP material is aging and vulnerable and its toughness is poor. The mechanical properties of PP material can be improved by elastomer modification, but the effects of different elastomers on the comprehensive properties of composite specimens are quite different. In this paper, the electrical and mechanical properties of different types of elastomer‐modified PP composites are compared and analyzed by combining experimental and molecular simulation (MS) methods. The experimental results show that the SEBS/PP composite material has the lowest trap energy levels among all kinds of composite materials, its space charge accumulation is 1.96 × 10−9C, and the mechanical and rheological properties improvement of the composite is the most remarkable. Meanwhile, the volume resistivity is reduced by two orders of magnitude compared with pure PP. However, the breakdown strength of all kinds of composite materials decreases by different degrees after the modification. The solubility parameters (δ) and the free volume are further investigated by the molecular simulation, which shows that the δ of SEBS is similar to that of PP, which represents the best compatibility. Moreover, the SEBS/PP composite material has the strongest inter‐molecular force and the most excellent toughness improvement for PP. This work provides a theoretical basis for elastomer selection in PP modification.

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“…So far, two kinds of important methods that have been proposed to enhance the breakdown field strength of polymers have mainly focused on the incorporation of nanofillers and voltage stabilizers. 15 − 18 It has been reported that the mechanism by which low content nanofillers (such as TiO 2 , 19 , 20 MgO, 21 , 22 and Al 2 O 3 23 , 24 ) can improve the breakdown strength of polymer is mainly attributed to two ways: (1) the tortuous path of electron breakdown caused by nanofillers. 25 , 26 (2) Nanofillers capture electrons by introducing deep traps into the polymer ( Figure 1 b).…”

Section: Introductionmentioning

confidence: 99%

“…So far, two kinds of important methods that have been proposed to enhance the breakdown field strength of polymers have mainly focused on the incorporation of nanofillers and voltage stabilizers. − It has been reported that the mechanism by which low content nanofillers (such as TiO 2 , , MgO, , and Al 2 O 3 , ) can improve the breakdown strength of polymer is mainly attributed to two ways: (1) the tortuous path of electron breakdown caused by nanofillers. , (2) Nanofillers capture electrons by introducing deep traps into the polymer (Figure b). It has been revealed that nano-SiO 2 can effectively improve the electrical insulation properties of polymers. ,, However, it is difficult for supersurficial nano-SiO 2 to disperse uniformly in the polymer, so the expected performance cannot be obtained.…”

Section: Introductionmentioning

confidence: 99%

Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

et al. 2021

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Cycloaliphatic epoxy (CE) resin plays a vital role in insulation equipment due to its excellent insulation and processability. However, the insufficient ability of CE to confine electrons under high voltage often leads to an electric breakdown, which limits its wide applications in high-voltage insulation equipment. In this work, the interface effect of inorganic nano-SiO 2 introduces deep traps to capture electrons, which is synergistic with the inherent ability of the voltage stabilizer m -aminobenzoic acid ( m -ABA) to capture high-energy electrons through collision. Therefore, the insulation failure rate is reduced owing to doping of the functionalized nanoparticles of the m -ABA-grafted nano-SiO 2 ( m -ABA-SiO 2 ) into the CE. It is worth noting that the breakdown field strength of this m -ABA-SiO 2 /CE reaches 53 kV/mm, which is 40.8% higher than that of pure CE. In addition, the tensile strength and volume resistivity of m -ABA-SiO 2 /CE are increased by 29.1 and 140%, respectively. Meanwhile, the glass transition temperature was increased by about 25 °C and reached 213 °C. This work proves that the comprehensive performance of CE-based nanocomposites is effectively improved by m -ABA-SiO 2 nanoparticles, showing great application potential in high-voltage insulated power equipment.

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Improved space charge suppression in PP/SEBS nanocomposites by controlling MgO nanoparticles with abundant surface defects

Abstract: Polymer nanocomposite dielectrics have received extensive attention in the field of electrical materials and equipment. Studies have shown that the interface region between the nanoparticles and polymer matrix has an important influence on the properties of nanocomposites.

Cited by 17 publications

References 24 publications

Eco‐friendly polypropylene power cable insulation: Present status and perspective

Eco‐friendly polypropylene power cable insulation: Present status and perspective

The influence and mechanism of elastomer types on electrical and mechanical properties of polypropylene insulation materials for high voltage cables

Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

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Improved space charge suppression in PP/SEBS nanocomposites by controlling MgO nanoparticles with abundant surface defects

Abstract: Polymer nanocomposite dielectrics have received extensive attention in the field of electrical materials and equipment. Studies have shown that the interface region between the nanoparticles and polymer matrix has an important influence on the properties of nanocomposites.

Cited by 17 publications

References 24 publications

Eco‐friendly polypropylene power cable insulation: Present status and perspective

Eco‐friendly polypropylene power cable insulation: Present status and perspective

The influence and mechanism of elastomer types on electrical and mechanical properties of polypropylene insulation materials for high voltage cables

Voltage-Stabilizer-Grafted SiO2 Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin

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Product

Resources

About

Voltage-Stabilizer-Grafted SiO₂ Increases the Breakdown Voltage of the Cycloaliphatic Epoxy Resin