Hollow Microsphere Material Reinforced Bio-hardener Based Epoxy Composites for Effective Electrical High-voltage Insulator Application
摘要
The current work involves the effective solid waste management of industrial waste fly ash cenosphere to produce composites with enhanced properties over individual components and their application for electrical insulation purposes. Composites were fabricated using epoxy resin Bisphenol A diglycidyl ether and epoxy hardener phenalkamine (poly (DGEBA- phk)) reinforced separately with 10wt%, 20wt%, 30wt%, 40wt%, and 50wt% of cenosphere. The neat polymer matrix and composites were analysed for thermal, mechanical and electrical behaviour. The findings revealed that the inclusion of cenosphere in epoxy matrix has significantly improved its thermal, mechanical, and electrical insulation properties. In comparison with the neat matrix and other fabricated composites, composites with 50wt% of cenosphere showed better behaviour. The value of tensile strength, flexural strength and hardness of 50wt% of cenosphere reinforced composites were observed at 25 MPa, 63 MPa and 89 HD, respectively. The mechanical study revealed that the addition of 50 wt% of cenosphere to composite reduced tensile strength and flexural strength but increased tensile modulus and flexural modulus. However, hardness improved with the addition of cenosphere compared to neat matrix. From the electrical insulation data, 50wt% cenosphere reinforced composites have excellent electrical insulation properties. The value of break down voltage, dielectric strength of 50wt% of cenosphere reinforced composites were noticed at 36 kV and 18 kV/mm, respectively. The value of electrical surface and volume resistivity of 50wt% cenosphere reinforced composites were noticed at 1013 Ω. From the results obtained from various analyses, composites can be applied for the electrical insulation applications.