Thermomechanical Characterization of Myriostachya wightiana Stem Fiber (MWSF)/Epoxy Composite: A Sustainable Material

The global focus on sustainable materials has intensified with the implementation of rigorous regulations aimed at reducing the use of harmful substances. In response to this global trend, researchers are actively promoting the development of environmentally friendly materials, placing a specific emphasis on natural fiber composites (NFCs) for sustainable applications. This study represents the inaugural effort to fabricate and characterize Myriostachya wightiana stem fiber composite. Fourier transform infrared analysis of the fiber indicates the presence of cellulose (O = H), hemicellulose (C = O), and wax (C≡C). X-ray diffraction reveals a crystallinity size and crystalline index of 3 nm and 54% for the fiber. Thermogravimetric analysis reveals activation energy (130 kJ/mol) and working temperature (up to 352.54 °C) of the fiber. The scanning electron microscope reveals surface features of the fiber. The present study explores the tensile and flexural properties of MWSF/epoxy composites in comparison to a four-layer jute composite and their hybrid counterpart. The findings indicate that the four-layer short fiber composite exhibits the good tensile strength (26.917 MPa), while the bidirectional woven fiber mat composites (M_bM_b [0, 90]) demonstrate a high tensile modulus (1.062 GPa). Among all composites, M_bM_b [0, 90] and J_bM_rM_rJ_b composite demonstrate the highest flexural strength (64.815 MPa) and flexural modulus (3.019 GPa), respectively. These findings underscore the potential of these composites for durable and sustainable applications.