The present invention relates to a high-strength wood-plastic composite material and a preparation method thereof, comprising the following components by weight percentage: 50–70 wt% of wood flour, 20–30 wt% of thermoplastic plastic, 0.2–3 wt% of a melting promoter, 8–14 wt% of attapulgite, 1–5 wt% of a lubricant, and 0.2–3 wt% of an antioxidant, wherein the wood flour is alkali-treated wood flour, and the attapulgite is organically modified attapulgite. The present invention also provides a preparation method of the high-strength wood-plastic composite material, specifically: weighing the components according to the mass percentage, mixing uniformly, feeding into a twin-screw extruder for melt extrusion and pelletization to obtain the high-strength wood-plastic composite material. In the present invention, the attapulgite is first pickled and then modified with a silane coupling agent, and the wood flour is alkali-treated to dissolve lignin and hemicellulose on the surface of cellulose, increasing the aspect ratio and cellulose content of cellulose. The modified attapulgite and alkali-treated wood flour synergistically enhance the mechanical properties of the wood-plastic composite material.
Country Code: CN
Application Number: CN202410162237.3
