A method using a combination of acid hydrolysis and ultrasonic homogenize were developed to obtain the CNF (cellulose nanofibers) from agave cantala fibers. Acid hydrolysis method able to produce the CNF with a diameter around of 45-50 nm, which can investigated by transmission electron microscopy (TEM). The homogenize mixing method between CNF 5 wt% colloidal and 3 wt% PVA (polyvinyl alcohol) with magnetic stirrer 350 RPM, at temperature of 50 o C, for 30 minutes followed by ultrasonic homogenizer has been causing CNF well distributed in the PVA matrix. PVA/CNF nanocomposites film was prepared by solution casting technique. Physical properties test by x-ray diffraction (XRD) and fourier transform infrared (FTIR) shows highly crystalline of CNF which indicates improvements the mechanical properties of PVA/CNF nanocomposite film. The tensile stress and elongation at break of PVA/CNF nanocomposite film were increased by 55 % and 137 %.
