Moisture resistant stones waste based polymer composites with enhanced dielectric constant and flexural strength. (1st February 2020)

• Record Type: Journal Article
• Authors: Sahu, Riya; Gupta, Manoj Kumar; Chaturvedi, Ranjan; Tripaliya, Sandhya Singh; Pappu, Asokan
• Is Part Of: Composites. Number 182(2020)
• Publication Date: 2020-02-01
• Subjects: Stone waste -- Waste utilization -- Polymer composite -- Water absorption -- Dielectric properties -- Flexural strength; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2019.107656
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Moisture resistant and high strength industrial stone waste powder based hybrid polymer composites are prepared using simple and cost effective compressive casting technique. Hybrid polymer composites of inorganic stone waste powder are fabricated with various filler concentrations of 10, 20, 30, and 50 wt% in epoxy resin matrix system. Mineral composition of stone waste powder was determined using X-Ray diffraction (XRD) analysis. Scanning electron microscopy (SEM) technique was performed to measure the dimension and surface morphology of stone powder and polymer hybrid composite. The variation of dielectric constant, dissipation factor, ac electrical conductivity of raw stone waste powder and their polymer composite were analyzed for their potential application in electrical insulation and microelectronics. High dielectric constant of 275 at 20 Hz and low dissipation loss factor of 0.02 at 2 MHz were observed for stone waste powder. Dielectric constant of stone based polymer composites was decreased significantly from 275 to 45, 47, 55, and 60 for filler concentrations of 10, 20, 30 and 50% in epoxy matrix, respectively. Ultra low water absorption of 0.08% and high flexural strength up to 39 MPa were achieved with 50 wt % stone. Such low water absorption, high dielectric constant and flexural strength make it suitable for durable and sustainable electrical insulting and advanced construction materials applications though eco-friendly process.