The invention relates to the technical field of multifunctional packaging material research and development, and discloses a preparation method of a renewable high-barrier packaging material. The method comprises: surface-modifying cellulose nanocrystals with an organic modifier to obtain organic molecule-modified cellulose nanocrystals, wherein the organic modifier is organic modifier I and/or organic modifier II; blending 5–20 parts by weight of polylactic acid resin and 0.5–5 parts by weight of organic molecule-modified cellulose nanocrystals via a twin-screw extruder, melting and extruding, then making into pellets with an average particle size of 1–5 mm using a pelletizer, and finally casting into a renewable high-barrier packaging material with a film thickness of 50–150 μm using a casting machine. The packaging material not only has excellent barrier properties, but is also renewable and recyclable, conforming to environmental trends, and can be applied in the packaging field.
Country Code: CN
Application Number: CN202411400448.2
