Introducing a groundbreaking exploration into the mechanical properties of epoxy
hybrid biocomposites, this study unveils a comprehensive analysis encompassing
tensile strength, flexural properties, impact resistance, and hardness
characteristics. The materials under scrutiny include hemp fiber (H), kenaf
fiber (K), and coconut powder (CP), both in their untreated state and after
undergoing alkaline processing. This research marks a significant milestone in
understanding these sustainable materials and their potential for enhancing
composite materials. In this endeavour, hemp is the basis material, while kenaf
and coconut are filler elements. The total weight proportion of hemp was kept
constant while the other two fibre fillers were changed. The unprocessed
laminate sample significantly improves tensile, flexural, and impact strength
with increasing coconut fiber loading. The improved interlinking capacity of the
natural fibre composites (NFC) and an epoxy matrix is also to blame for the
composite’s efficient resistance competency. Furthermore, the creation of
powerful hydrogen bonds due to the increased polarisation of the epoxy matrix
improved the bending characteristics of the hybrid natural composites. Untreated
specimens’ impact strength was enhanced by up to 20% wt. of CP and K. The
addition of more CP and K had a detrimental effect. Furthermore, as coconut
fibre loading increased, the hardness value of unprocessed samples declined
steadily. The mechanical properties of unprocessed material and chemically
modified hybrid samples were evaluated. Compared to unprocessed composite
samples, the results of alkali-treated composite samples demonstrate more
excellent tensile, flexural, compression, impact strength, and hardness. SEM
examinations on the fractured surface of hybrids revealed that surface
alteration of the fibre occurred, which increased fibre-matrix interaction.