Interplay of Fiber Surface Properties and Processing on the Performance of Sustainable Bamboo‐Reinforced Bio‐Polycarbonate Composites

ABSTRACT This study explores the development of sustainable bamboo fiber‐reinforced bio‐based polycarbonate (BF‐PC) composites. Prepreg laminates were fabricated using solvent‐based impregnation and compression molding. The effects of chemical surface modifications—alkali and silane—on bamboo fiber properties, interfacial bonding, and composite performance are studied and supplemented by comprehensive characterization, including FTIR, SEM, fiber density, single fiber tensile testing, cross‐sectional microscopy, void fraction analysis, and tensile and flexural testing. Results revealed that 2 g/L silane‐treated fibers showed the highest improvements in mechanical properties and interfacial adhesion, achieving tensile and flexural strengths of 162 MPa and 184 MPa, respectively. In contrast, alkali treatments failed to improve bonding and resulted in lower composite performance. In summary, surface chemistry of natural fibers and circular buildings, circular composites, natural fibre composites, renewable composites, renewable matrixcomposite processing play a crucial role in renewable polycarbonate matrix composite engineering.