Novel environment-friendly odorless printing ink and preparation method thereof

The invention belongs to the technical field of printing coatings, and particularly relates to a novel environment-friendly odorless printing ink and a preparation method thereof. The product developed by the invention comprises, by weight,30-60 parts of a pigment, 10-20 parts of polyesterimide resin, 10-15 parts of nano-graphene oxide, 3-5 parts of a surfactant and 1-5 parts of a defoaming agent.The polyester imide resin takes n-butyl phthalate as a cross-linking agent, and the chain length between adjacent cross-linking points is greater than the length of a chain segment under the same condition; and oxidized starch particles are embedded between the nano-graphene oxide layers. In addition, sulfonated polyaniline is also adsorbed between the graphene oxide layers; at least part of carboxyl groups in the oxidized starch particles are oxidized into aldehyde groups; and the oxidized starch particles are connected with hydroxyl groups in an interlayer conjugate region of the nano-graphene oxide through aldehyd