Enhancement in Electrical and Thermal Properties of LDPE with Al2O3 and h-BN as Nanofiller

Low-density polyethylene (LDPE) has excellent dielectric properties and is extensively used in electrical equipment. Hexagonal boron nitride (h-BN) is similar to a graphite-layered structure, and alumina fiber (Al2O3) has high-temperature resistance and a strong performance. Herein, we prepared Al2O3-h-BN/LDPE nanocomposites by using LDPE as the matrix material and h-BN and Al2O3 as the fillers. The influence of different doping contents and the mass ratio of Al2O3 and h-BN (1:1) to LDPE on the electrical properties and thermal conductivity of the nanocomposites was examined. The results showed that the suppression effect on space charge was the most obvious and average. The charge density was the lowest and had the minimum decay rate when the doping content was 2%. The breakdown strength of the film reached the maximum value of 340.1 kV/mm, which was 12.3% higher than that of the pure LDPE (302.8 kV/mm). The thermal diffusivity of the composite sample was also higher than that of the single h-BN-doped sample when the content of h-BN and Al2O3 was 7%. The thermal conductivity was 59.3% higher than that of the pure LDPE sample and 20% higher than that of h-BN/LDPE.

[1]  S. Lee,et al.  Surface modification of blue TiO2 with silane coupling agent for NOx abatement , 2021 .

[2]  B. Qi,et al.  Environment-friendly Insulating Gases for HVDC Gas-insulated Transmission Lines , 2021 .

[3]  Li Tang,et al.  Hollow polymeric microsphere-filled silicone-modified epoxy as an internally insulated material for composite cross-arm applications , 2020 .

[4]  Z. Fu,et al.  Enhanced Thermal Conductivity and Dielectric Properties of h-BN/LDPE Composites , 2020, Materials.

[5]  Xinjian Li,et al.  High thermoelectric performance in nano-SiC dispersed Bi1.6Pb0.4Sr2Co2Oy compounds , 2020 .

[6]  V. Zarubin,et al.  A Variation Model of Thermal Breakdown of a High-Voltage DC Cable Electrical Insulation , 2020 .

[7]  Jiandong Wu,et al.  Effect of micro and nano-size boron nitride and silicon carbide on thermal properties and partial discharge resistance of silicone elastomer composite , 2020, IEEE Transactions on Dielectrics and Electrical Insulation.

[8]  Xingyi Huang,et al.  Boron nitride nanosheets endow the traditional dielectric polymer composites with advanced thermal management capability , 2019, Composites Science and Technology.

[9]  A. Mohamed,et al.  Enhancing compressive, tensile, thermal and damping response of pure Al using BN nanoparticles , 2018, Journal of Alloys and Compounds.

[10]  Yue Ma,et al.  Effect of maleic anhydride on trap levels of alumina/low-density polyethylene by photo-stimulated discharge , 2018, Integrated Ferroelectrics.

[11]  Tiandong Zhang,et al.  Excellent Energy Storage of Sandwich-Structured PVDF-Based Composite at Low Electric Field by Introduction of the Hybrid CoFe2O4@BZT–BCT Nanofibers , 2018 .

[12]  I. Sakellis,et al.  Interfacial and space charge dielectric effects in Polypyrrole/Zinc Oxide composites , 2017 .

[13]  J. Zha,et al.  High thermal conductivity and excellent electrical insulation performance in double-percolated three-phase polymer nanocomposites , 2017 .

[14]  Shengtao Li,et al.  Modelling of dielectric breakdown through charge dynamics for polymer nanocomposites , 2016, IEEE Transactions on Dielectrics and Electrical Insulation.

[15]  R. Suzuki,et al.  Fabrication of a novel aluminum surface covered by numerous high-aspect-ratio anodic alumina nanofibers , 2015 .

[16]  A. P. Kovchavtsev,et al.  The influence of electron energy quantization in a space-charge region on the accumulation capacitance of InAs metal-oxide-semiconductor capacitors , 2015 .

[17]  Myeongjin Kim,et al.  Enhancement of the thermal and mechanical properties of a surface-modified boron nitride–polyurethane composite , 2014 .

[18]  B. Du,et al.  Effects of thermal conductivity on dc resistance to erosion of silicone rubber/BN nanocomposites , 2014, IEEE Transactions on Dielectrics and Electrical Insulation.

[19]  C. Zhi,et al.  Polyhedral Oligosilsesquioxane‐Modified Boron Nitride Nanotube Based Epoxy Nanocomposites: An Ideal Dielectric Material with High Thermal Conductivity , 2013 .

[20]  Z. Yu,et al.  Study on Surface Modification of Nano-Alumina with Silicane Coupling Agent KH550 , 2012 .

[21]  Xingyi Huang,et al.  Nanoparticle surface modification induced space charge suppression in linear low density polyethylene , 2009 .

[22]  Zhiting Tian,et al.  A Molecular Dynamics Study of Thermal Conductivity in Nanocomposites via the Phonon Wave Packet Method , 2009 .

[23]  L. Dissado,et al.  The space charge decay of high density polyethylene under different temperatures and accumulation fields , 2007, 2007 IEEE International Conference on Solid Dielectrics.

[24]  T. Mizutani.  Behavior of Charge Carriers in Organic Insulating Materials , 2006, 2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena.

[25]  V. Prakapenka,et al.  The high-pressure phase transformation and breakdown of MgFe2O4 , 2006 .

[26]  S. Han,et al.  Electroluminescence test to evaluate dielectric property at the interface between semiconductive shield and insulation , 2004, Conference Record of the 2004 IEEE International Symposium on Electrical Insulation.

[27]  M. Ieda,et al.  TSC Study on Interfacial Phenomena in PE (Polyethylene)-EVA (Ethylene-Vinylacetate Copolymer) Laminated Films , 1982 .

[28]  J. G. Simmons,et al.  Theory of Isothermal Currents and the Direct Determination of Trap Parameters in Semiconductors and Insulators Containing Arbitrary Trap Distributions , 1973 .