Electrical properties of banana fiber‐reinforced phenol formaldehyde composites

Abstract

The electrical properties of banana fiber-reinforced phenol formaldehyde composites have been studied with special reference to fiber loading, fiber treatments, and hybridization with glass fibers. The dielectric constant decreased with frequency and fiber loading. Treatments with silanes, NaOH and acetylation, latex treatment, heat treatment, and cyanoethylation decreased the dielectric constant value. The dielectric constant is higher for banana/PF composites than that of glass/PF composites. In hybrid composites, the dielectric constant decreased with increase in glass fiber concentration. The volume resistivity of banana fiber-reinforced phenol formaldehyde composites decreased with frequency and fiber loading. Chemical modifications in the fiber increased the volume resistivity of the composites. Volume resistivity of banana/glass hybrid composites increased with increase in glass fiber content. Layered composites with glass fiber at periphery were found to have higher volume resistivity than other layering patterns. The loss factor decreased by the chemical treatments and in hybrid composites it decreased with increase in volume fraction of glass fibers.

Electrical Insulating Properties of Natural Fibre Reinforced Polymer Composites; A Review

“…Seena Joseph et al [1] studied electrical properties of banana fiber reinforced phenol formaldehyde composites with fiber loading, fiber treatments and hybridization with glass fibers. Treatments with silanes, NaOH and acetylation, latex treatment and heat treatment, decreased the dielectric constant value.…”

“…The change in the fiber loading or treatment changes the structure and hence dielectric constant. [1,9] The resistivity of fiber reinforced composites depend on the moisture content, crystalline and amorphous component present, presence of impurities, chemical composition, cellular structure. The shapes of reinforcement determine the inter particle contact, which affect the conductivity of the system.…”

“…Seena Joseph et al [1] In banana fiber composites, at low frequencies as the fiber loading increases, the loss factor also increases. But at high frequencies a reverse behavior is observed and the values come closer.…”

“…With fillers in the form of fibers and flakes have been found to be most effective for this purpose due to the lower volume fractions needed to achieve a targeted conductivity. [1][2][3][4][5] PLASTICS Plastics are nothing but polymers formed due the molecular reaction of monomers. Depending upon their chemistry they can be very much like rubber, or as strong as aluminum.…”

Oil Palm Biomass Fibres and Recent Advancement in Oil Palm Biomass Fibres Based Hybrid Biocomposites

“…Researchers investigated dielectric behaviours of glass and jute fibres reinforced polyester hybrid composites and later on electrical properties of banana/glass hybrid fibre reinforced composites with varying hybrid ratios and layering patterns were analyzed (Fraga et al 2006;Joseph and Thomas 2008). In 2006, Ist time dielectric characteristics and volume resistivity of sisal-oil palm hybrid biocomposites investigated (Jacob et al 2006).…”