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The use of environmentally friendly agro-waste fibres as reinforcement has opened a new direction to polymer composite science. Research has suggested that changing the surface of the fibre by both physical and chemical processes improves the efficiency of the natural fibre/polymer matrix. This research explores the kinetic and function of water absorption and its relevance for the mechanical properties of potassium permanganate (KMnO₄) treated plantain (Muse Paradisiacal) fibres reinforced epoxy bio-composite. Treated fibres were characterized by wide-angle X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscope (SEM) and thermogravimetric analysis (TGA). The XRD study shows a significant shift in the crystallographic parameters of the material, the FTIR spectral indicates the fractional elimination of wax, hemicellulose and lignin substance. TGA indicates that the thermal …