Structure and mechanical properties of new biomass-based nanocomposite: Castor oil-based polyurethane reinforced with acetylated cellulose nanocrystal

► Acetylated cellulose nanocrystals resulted in the simultaneous enhancement of strength, modulus and elongation. ► Acetylation of cellulose nanocrystals improved the dispersion stability in blending medium and the miscibility with matrix. ► Castor oil together with acetylated cellulose nanocrystals as reinforcing filler contributed high biomass content.