Hybrid Nanoparticle-Based XLPE/SiO2/TiO2 and XLPE/SiO2 Nanocomposites: Nanoscale Hybrid Assembling, Mechanics and Thermal properties

Abstract

This report demonstrates the successful use of hybrid nanoparticles of SiO 2 and TiO 2 in cross-linked polyethylene (XLPE) and reports the comparison of mechanical properties and thermal stability of XLPE/SiO 2 /TiO 2 nanocomposites compared to XLPE/SiO 2 , at different filler concentrations and with neat XLPE. In the present system of XLPE/SiO 2 nanocomposites, tensile strength and thermal stability show an increasing trend with nanoparticles, followed by a decaying trend at higher filler loading, whereas in XLPE/SiO 2 /TiO 2 composites the property improvement is directly proportional to the filler concentration by avoiding the possibility for aggregation. It is found that the hybrid nanoparticles are efficiently dispersed in XLPE matrix, have the potential to reduce the tendency of aggregation by the combined effect of surface treatment on the nanoparticles and difference in surface characteristics of two kinds of nanoparticles. This results a direct correlation in property improvement with nanofiller concentration. This structure-property correlation is established using TEM images.

Recent Advances in Cross-linked Polyethylene-based Nanocomposites for High Voltage Engineering Applications: A Critical Review

“…Nanofillers such as SiO 2 , TiO 2 , Al 2 O 3 , CaCO 3 , MgO, ZnO, and carbon black are commonly used to enhance the electrical properties (space charge accumulation, breakdown strength, dielectric loss, PD, etc.) of XLPE. − The geometric shape, dispersion state, particle size, and surface quality of the filler affect the entire property of the nanocomposites. , XLPE nanocomposites can be fabricated from different ways such as in situ polymerization, sol–gel processing, solution casting, and melt mixing. , The reason behind the changes in electrical properties of XLPE nanocomposites are shown Table S4 in the Supporting Information. Depending on the geometry or dimensions of the particles, four main types of fillers are distinguished.…”

Wettability Behavior of XLPE Nanocomposite with Surface Modified Nanofiller

“…Engagement of nanofillers with XLPE has further exposed the enhancement of the properties of the mixture and reduced the incompatibility issue between matrix and inorganic fillers [1], [2]. Studies have shown that the incorporation of nanofillers, such as silica (SiO 2 ), zinc oxide (ZnO), calcium carbonate (CaCO 3 ), silicon carbide (SiC), boron (BN), titanium oxide (TiO 2 ), and aluminium oxide (Al 2 O 3 ) has the ability to modify the dielectric properties of polyethylene [1], [3]- [6] and improve the mechanical and thermal properties of the nanocomposites [2], [7], [8]. Study on the adoption of modified nanoparticles in nanocomposites blend was found to be able to assist in providing higher compatibility between polymer and nanofiller [9].…”