Intrinsic Response of Surface Modified Calotropis gigantea Fiber and Nelumbo nucifera Filler Hybrid Composite

The present study implemented a novel combination of Calotropis gigantea fiber, which has minuscule significance in vegetation value, and waste Nelumbo nucifera filler for the production of polymer composites. The Calotropis gigantea yarn fiber is twisted into Two-Ply Yarn and subsequently woven into mats, the mat underwent both NaOH treatment and microwave irradiation in order to enhance their compatibility with epoxy. This work aims to examine the mechanical and dynamic properties of a hybrid composite material consisting of a chemically and microwave treated Calotropis gigantea (CMTCG) fiber combined with Nelumbo nucifera (NN) infills. The objective of this study is to investigate the possible improvement of the mechanical and dynamic characteristics of polymer composites by developing composite samples that include different weight proportions of NN fillers in CMTCG–reinforced epoxy composites. The assessment of the mechanical properties of several combinations of CMTCG with NN infills was conducted utilizing established testing methodologies, including tensile, flexural, impact, and dynamic mechanical analysis (DMA) to assess the viscoelastic nature of the composites. In addition to this, a Cole–Cole curve is plotted by utilizing the findings of the DMA to analyze the effect of particle impregnation and the anticipation of the heterogeneity of the composite material at different loadings of fillers. The current investigation revealed that a fiber loading of 10 weight percentages represented the optimal threshold, and any loading value resulted in a noticeable decline in all characteristics.