Natural Fiber Reinforced Hybrid Composites Research Articles

Review of natural fibre-reinforced hybrid composites

Natural fibre-reinforced hybrid composites which contain one or more types of natural reinforcement are gaining increasing research interest. This paper presents a review of natural fibre-reinforced hybrid composites. Both thermoplastic and thermoset composites reinforced by hybrid/synthetic fibres or hybrid/hybrid fibres are reviewed. The properties of natural fibres, the properties and processing of composites are summarised.

Effect of Lamina Fiber Orientation on Tensile and Free Vibration (by Impulse Hammer Technique) Properties of Coconut Sheath/<i>Sansevieria cylindrica</i> Hybrid Composites

This work addresses the effect of intermediate lamina orientation and chemical treatment of natural fiber reinforced hybrid composites on tensile and free vibration properties. Two different form of fibers such as Sansevieria cylindrica (SCF) in the form of loosely separated and coconut sheath (CS) in the form of naturally available woven mat have been chosen for hybrid reinforcement in polyester matrix resin. The compression molding technique was used to fabricate the composites with the help of specially designed mold for fiber orientation. By keeping the overall weight percentage of hybrid composites constant (40 wt %), the long fiber SCF was sandwiched between two CS. The hybrid composites were fabricated the with five different intermediate lamina orientation (i.e, 0°, 30°, 45°, 60° and 90°) using SCF. The tensile strength and free vibration properties were analyzed for all the fabricated composites according to the ASTM standard and impulse hammer technique.The change in orientation of intermediate lamina have shown significant effect on both tensile and vibration properties. The potassium permanganate (KMnO4) chemical treatment was also carried out for the optimum oriented angle laminate. The chemical treatment shows the siginificant enhancement in both the properties compared to the untreated condition.