Comprehensive investigation of Areca catechu tree peduncle biofiber reinforced biocomposites: influence of fiber loading and surface modification

In recent scenario, biocomposites are considered counterpart to synthetic fiber reinforced polymer composites due to their comparable specific mechanical characteristics, sustainability, low energy consumption during manufacturing, low cost and biodegradable nature. In this investigation, the influence of fiber loading and sodium hydroxide (NaOH) treatment on thermo-mechanical, morphological and water absorption properties of Areca Catechu tree peduncle fibers (ACTPFs) reinforced in Unsaturated Polyester Resin (UPR) matrix biocomposite has been explored. The biocomposites with 40 wt.% of ACTPF exhibited maximum mechanical characteristics with tensile, flexural, hardness and impact properties of 63 MPa, 56 MPa, 68 HRRW and 5.33 J/cm 2 respectively. Also, the NaOH treatment of ACTPF reinforcement improved the tensile, flexural, hardness and impact properties of biocomposite specimens by 3.9%, 4%, 4.12% and 4.4% respectively. The scanning electron microscopic (SEM) images, X-ray diffraction (XRD) spectrum and Fourier Transform Infrared (FTIR) spectrum of the biocomposites were witnessed to ensure its suitability in industrial applications. The acceptable hydrophilic nature, less density and thermal stability up to 237 °C of biocomposite specimens achieved through NaOH-treated ACTPF reinforcements suit well for interiors of automobile and aerospace sectors. Graphical Abstract