“…Such treatment involves the removal of impurities and contaminants from the fibers, leading to improvements in their quality. Researchers [5][6][7][8] have demonstrated that alkali treatment, typically employing a 5-10% NaOH solution, is highly effective for fibers like sisal, banana, areca nut husk, and coconut. A. Widnyana et al conducted a study on coconut fibers treated with a 6% NaOH solution, revealing a tensile strength of 130.9 MPa in single-fiber tensile tests, while composite panels made from coconut fibers achieved 24.5 MPa.…”