A research of preparation and properties of epoxy resin/carbon fiber/phenolic residual carbon composites with adjustable destructive permittivity conduct: Fullerenes, Nanotubes and Carbon Nanostructures: Vol 0, No 0

Summary

Lately, there have been increasingly researches on the dielectric properties of carbon-based composites, and its dielectric tunability is a sizzling analysis matter. On this paper, epoxy resin/carbon fiber/phenolic residual carbon (EP/CF/C) was ready by high-temperature sintering, vacuum liquid part impregnation and hot-press curing strategies. The AC conduction conduct, dielectric properties and impedance properties of composites with totally different CF/C compression ratios (1, 1.5, 2) are studied. With the rise of CF/C compression ratio, the destructive dielectric properties of composites are getting stronger and stronger. The outcomes present that when the CF/C compression ratio is 1, the composites happen percolation phenomenon and dielectric fixed is destructive. When the CF/C compression ratio is 2, absolutely the worth of the destructive dielectric coefficient of the EP/CF/C composite reaches 9.8 × 10⁴, and the conductivity reaches 0.54 S/cm. As well as, impedance evaluation has additional confirmed that the inductance properties result in the destructive dielectric properties of the fabric. The adjustable destructive dielectric properties of EP/CF/C composites can present some ideas for the sphere of electromagnetic shielding and capacitors.