Cellulose nanocomposites with nanofibres isolated from pineapple leaf fibers for medical applications

► Well interconnected web like nanofibrils extracted from pineapple leaf fibers by steam coupled acid treatment. ► Nanofibres prepared by this technique observed to have very high percentage yield and aspect ratio in comparison with other conventional methods. ► High strength nanocellulose reinforced polyurethane composites developed for medical application. ► Assessment of medical applicability of the developed nanocomposites for use as tissue implants such as heart valves and vascular grafts.