Properties of nanofillers/crosslinked polyethylene composites for cable insulation

Abstract

In this work, we report the effect of nanofillers and filler loading on mechanical, physical, dielectric, and thermal properties of the crosslinked polyethylene (XLPE) matrix. XLPE filled with 0.5-2% of zinc oxide (ZnO), aluminium oxide (Al 2 O 3 ), and organoclay (OMMT) nanofillers prepared by melt mixing with a single screw extruder followed by hot press moulding. Nanocomposites were tested as per ASTM standard methods and characterized with tensile test, water absorption, linear rate of burning, dielectric breakdown strength, and thermal stability. Scanning electron microscopy (SEM) was used to examine the surface morphology of the nanocomposites. The results showed that addition of nanofillers improved tensile strength, elongation at break, Young's modulus, burning rate, dielectric breakdown strength, and decomposition temperature. However, water absorption increased with time due to the hydrophilic properties of nanofillers. In general, based on the properties measured Al 2 O 3 exhibits the highest properties than those of ZnO and OMMT nanofillers. Addition of 1.5% of Al 2 O 3 in XLPE matrix has led to the improvement in tensile strength, elongation at break, Young's modulus, burning rate, and dielectric breakdown strength as compared to the unfilled polymer. J. VINYL ADDIT. TECHNOL., 25: E147-E154, 2019.

Improvement of dielectric strength and properties of cross-linked polyethylene using nano filler

“…By adding the nano-filler to the matrix of the XLPE, the surface area of the particles and the interfacial area are increased. Therefore, a high volume of interaction zones is formed [23], [24], which in turn escalates the trapping of charges such as electrons inside interaction zones.…”

Application and Suitability of Polymeric Materials as Insulators in Electrical Equipment

“…The initial flexural modulus can be calculated using a slope of the line measuring Δf and ΔF as presented in Figure 7, depicting a typical force bending flexural test. Lim et al [79] use a combination of the different fillers of aluminum oxide (Al2O3), Zinc oxide (ZnO), and organoclay. However, it was discovered that with 1.5% aluminum oxide, improved mechanical, burning rate, and dielectric breakdown compared to Zinc oxide and organoclay.…”

“…The production of heat-resistant polymers began in the late 1950s with the goal of producing heat-resistant polymers that could satisfy the needs of the aerospace and electronics industries. Heat Lim et al [79] use a combination of the different fillers of aluminum oxide (Al 2 O 3 ), Zinc oxide (ZnO), and organoclay. However, it was discovered that with 1.5% aluminum oxide, improved mechanical, burning rate, and dielectric breakdown compared to Zinc oxide and organoclay.…”

Effect of SiO2 particle size scale on the electrical performance of epoxy‐based nonlinear conductive composite

“…The specific improvement is closely related to the micro nano oxides' type, doping content, shape, and surface modification. [7,[10][11][12][13][14][15] The effect of surface modification and doping content (2, 5, and 10 wt%) of nano SiO 2 (particle size of 10-20 nm) on the dielectric properties of nano SiO 2 /LDPE composites was investigated by the solution blending method by Lau. The surface-modified SiO 2 nanoparticles had better dispersion and better performance, and the longer the molecular chain of the silane coupling agent used for surface modification, the better the performance of the corresponding composite.…”