Response of extreme environmental aging on the novel Moringa stenopetala husk fiber/epoxy composites: Understanding the characteristics and thermokinetic behavior

Abstract

AbstractThe increasing use of composite components in various engineering disciplines necessitates detailed comprehension of their operation. When subjected to adverse environmental circumstances, such as variable humid surroundings and UV radiations, the structural and mechanical characteristics of the composites can deteriorate. Additionally, using these composite materials for structural applications such as rooftop buildings or household properties may reduce lifespan. In this study, the static and dynamic mechanical properties and the stability of novel lignocellulosic Moringa stenopetala (MS) husk fiber‐based epoxy composites exposed to various environmental factors were assessed. These harsh conditions were picked to imitate those encountered outside and influence the longevity of these composites. The obtained fiber from the husk was examined for its physiological, structural, and thermal characteristics. Using the Broido, Kissinger, Flynn‐Wall‐Ozawa (FWO), Coats‐Redfern and Kissinger‐Akahira‐Sunose (KAS) isoconventional models, the thermal degradation kinetics of the fibers were investigated. KAS method results in the best‐fitted curve and shows maximum activation energy of 175.13 KJ/mol. After husk fiber assessment, composite materials were fabricated using a Hand layup method, and their static and dynamic mechanical properties, water uptake rate, and contact angle analysis with surface energy behavior under various environmental aging circumstances were studied. In comparison to the composites “as developed,” the findings indicate that the mechanical characteristics of husk fiber‐based epoxy composites are significantly reduced by humidity and UV aging. Overall, the development of thermoset composites for structural applications can utilize husk fiber. Furthermore, after curing the water and UV‐aged composites, qualities can be recovered.