Abstract
AbstractThis research work focuses to improve the interfacial adhesion in aramid/epoxy composites by various chemical treatments of aramid fiber surface. The effect of chemical grafting on the fiber surface was studied using X‐ray diffractometer and field emission scanning electron microscopy. In addition, short beam and microbond tests were carried out to evaluate the interlaminar shear strength (ILSS) and interfacial shear strength (IFSS) respectively. Moreover, the single fiber tensile strength and fracture toughness of treated and untreated (NT) aramid fibers were computed. The results reveal that the ILSS and IFSS of erpichlorohydrin with phosphoric acid pre‐treated (TE‐P) fibers having 140.92% and 66.89% higher than untreated (NT) fibers. Consequently, the single fiber tensile strength of surface modified aramid filament is 31.22% higher than the untreated (NT) filament. Later, the Weibull model was developed to predict the single fiber tensile strength. Significantly, the result shows that the interfacial fracture toughness of TE‐P treated fibers was improved by 170.10% as compared with untreated (NT) fibers. Finally, fractographic analysis was employed to validate the improvement of interfacial adhesion properties in aramid/epoxy composites.
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