Nanocomposite elastomer

A composite material comprising an elastomer and nanocellulose. The nanocellulose may compirse a nanocellulose material derived from plants having C4 leaf anatomy， or a nanocellulose material derived from a plant material having a lesser amount of lignin than hemicellulose， or a nanocellulose having a hemicellulose content of from 25% to 55% by weight of the nanocellulose material， or a nanocellulose comprising nanofibrils having a diameter of up to 5nm， or a nanocellulose comprising nanocellulose material of plant origin comprising nanocellulose particles or fibres having an aspect ratio of at least 250， or the composite material having a stiffness of not greater than 2.5 times the stiffness of the elastomer without the nanocellulose material being present， or the nanocellulose particles or fibres being derived from a plant material having a hemicellulose content of 30% or higher (w/w). The nanocellulose may be derived from arid Spinifex. A composite material comprising an elastomer and nanocellulose. The nanocellulose may compirse a nanocellulose material derived from plants having C4 leaf anatomy， or a nanocellulose material derived from a plant material having a lesser amount of lignin than hemicellulose， or a nanocellulose having a hemicellulose content of from 25% to 55% by weight of the nanocellulose material， or a nanocellulose comprising nanofibrils having a diameter of up to 5nm， or a nanocellulose comprising nanocellulose material of plant origin comprising nanocellulose particles or fibres having an aspect ratio of at least 250， or the composite material having a stiffness of not greater than 2.5 times the stiffness of the elastomer without the nanocellulose material being present， or the nanocellulose particles or fibres being derived from a plant material having a hemicellulose content of 30% or higher (w/w). The nanocellulose may be derived from arid Spinifex.