Graphene wood-plastic micro-foaming material with uniform foam and preparation method of micro-foaming material

Abstract

The invention discloses a graphene wood-plastic micro-foaming material with uniform foam and a preparation method of the micro-foaming material. The method comprises the following steps: a, washing wood powder by using an alkali, performing draining, performing ultrasonic wave-vacuum synergetic dispersion on the dried wood powder, silicon micropowder and graphene under the protection of an inert gas, performing washing by using water, performing drying, and linking the silicon micropowder, the wood powder and the graphene to form micro fine powder to obtain composite powder under the action ofthe alkali at the surface of the wood powder treated by the alkali; b, mixing the composite powder, resin and a zeolite molecular sieve to prepare a mixed material; c, performing extrusion granulation on the mixed material to obtain mixed granules; and d, adding a foaming agent into the mixed granules, and performing micro-foaming injection molding to obtain the wood-plastic composite material with the uniform foam. The method disclosed by the invention greatly eliminates moisture in the bamboo wood powder, reduces high-temperature damage to the wood powder structure, and has a safe and high-efficiency drying manner; and the obtained bamboo wood powder has good and strong interface bonding performance with the resin, micropores generated by foaming have regular shapes, small pore diameters, uniform distribution, foaming quality is good, so that the composite material has good surface hardness, good toughness, high strength, and a wide application range.

Description

technical field [0001] The invention relates to the field of foaming materials, in particular to the preparation of wood-plastic micro-foaming materials, in particular to a graphene wood-plastic micro-foaming material with uniform cells and a preparation method. Background technique [0002] Wood-plastic composite foaming material is to mix plastics, wood powder, mineral fillers, additives, modifiers and foaming agents and other raw materials according to the mass ratio, and heat and melt them by plastic molding equipment to form a continuous and evenly distributed foaming microstructure. Composite material with holes. The density of the product is close to that of wood, but the mechanical strength is much higher than that of wood. Since the amount of resin is reduced by half, the cost of the product is lower; in addition, foaming can also give the product a more precise appearance and size, and it has a more woody feel than non-foamed composites , and easy to install. In ...

AI Technical Summary

Problems solved by technology

[0008] It can be seen that, in the wood-plastic foamed material in the prior art, the interfacial binding between wood powder and resin is poor, and there are problems such as poor foaming quality and poor mechanical properties of the material.

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