The invention discloses a wood-plastic
composite material and a preparation method thereof, and the wood-plastic
composite material comprises the following raw materials according to the
mixing ratio by parts by weight: 30-80 parts of modified
fiber powder; 15-80 parts of plastics; 2-10 parts of phase
solvent; 2-10 parts of
lubricant; 0-10 parts of stabilizer; 0.2-1.0 part of
antioxidant; 5-15 parts of filler; and 2-20 parts of
flame retardant.
Lignin is utilized for modifying
fiber powder, then composition with the plastics is carried out, and a finished-product material is formed by
extrusion. The preparation method can solve the problems of the compatibility of wood fibers with the
thermoplastic plastics, the surface treatment technology of the raw materials by utilizing the
lignin and the like, realize the comprehensive utilization of the
lignin and the waste plastics, be capable of replacing wood, increase the additional value of the
lignin and solve the utilization problem of the lignin wastes. The manufactured wood-plastic
composite material can significantly improve the mechanical performance, the tensile strength, the
flexural strength and the
impact resistance, and realize the industrial production of high-performance products, such as construction materials.