Sustainable Reinforcement: Development and Characterization of Vetiver Fiber‐Soy Resin Biocomposites With Shorea robusta Leaf Filler

ABSTRACT Bio‐based fiber‐reinforced composites are emerging as eco‐friendly substitutes for traditional plastics, addressing environmental concerns while offering robust material properties. This study focuses on developing vetiver root fiber‐based biocomposites, with soy resin forming the matrix and Sal ( Shorea robusta ) leaf serving as filler. The resulting composites containing 30 wt.% of filler exhibit remarkable strength characteristics, such as 53.85 MPa of tensile strength and 55.87 MPa of flexural strength. Furthermore, reduced water uptake (38.2% after 24 h) and a contact angle of 85.5°, evidenced hydrophobicity, minimizing moisture‐related degradation. Biodegradation tests, incorporating weight loss measurements, FTIR analysis, and SEM imaging, confirmed the environment‐friendly nature of the material, with safe decomposition post‐use. These features make the biocomposites suitable for industrial applications such as single‐use table wares and nursery pots. By replacing non‐biodegradable plastics and plastic‐reinforced composites, these materials contribute significantly to reducing environmental pollution and promoting a cleaner, greener future.