Multilayer film for packaging and method of manufacture thereof

A method for manufacturing a multilayer film for packaging, the method comprising the steps of:

• providing functionalised graphene;
• mixing the functionalised graphene with cellulose;
• dispersing the mixture of the functionalised graphene and the cellulose in an organic solvent to form an ink;
• arranging for the organic solvent to further include a binder, including an organic compound, compatible with the organic solvent and with the functional group of the functionalised graphene to enable interaction therebetween;
• functionalising a first layer of substrate with a functional group that interacts with a functional group of the functionalised graphene;
• and
• depositing a first layer of the ink on the first layer of substrate such that a nano-fibrous layer of functionalised graphene interspersed with cellulose is formed on the first layer of substrate;
• functionalising a second layer of substrate with a functional group that interacts with the functional group of the functionalised graphene;
• adding a second layer of ink and bringing the first layer of substrate and the second layer of substrate together so that the first layer of ink and the second layer of ink are sandwiched between the first layer of substrate and the second layer of substrate, the first layer of ink between the first layer of substrate and the second layer of ink, and the second layer of ink between the second layer of substrate and the first layer of ink.