Method for preparing polyethylene-based wood-plastic composite material by using bagasse

Abstract

The invention discloses a method for preparing a polyethylene-based wood-plastic composite material by using bagasse. The method comprises the steps: soaking the bagasse into a sodium hydroxide aqueous solution for alkalization treatment, then, washing with distilled water, then, drying, and carrying out mechanical crushing, so as to prepare bagasse powder with the particle diameter of 100-200 meshes; weighing raw materials, namely the bagasse powder, medium-density polyethylene, benzoyl peroxide, maleic anhydride, silicone oil, chlorinated paraffin and dibasic lead phthalate, according to the following mass ratio of (20-60): (10-50): (0.5-2): (1-4): (15-20): (1-7): (0.5-4.0), uniformly mixing the raw materials in a high-speed stirrer so as to prepare a mixed material, and then, reacting and extruding in a twin-screw extruder, thereby preparing an extruded-molded sheet material, namely the polyethylene-based wood-plastic composite material. According to the method disclosed by the invention, the operation is simple, the waste is utilized, and large-scale popularization and application are facilitated; the prepared polyethylene-based wood-plastic composite material is non-toxic and environment-friendly, is excellent in comprehensive performance and easy in processing and can replace the traditional timber, thereby having a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic composite material preparation, in particular to a method for preparing polyethylene-based wood-plastic composite material by using bagasse. Background technique [0002] Wood-plastic composite materials contain wood powder and hot-melt plastic raw materials, and the hot-melt plastic raw materials can be industrial or domestic waste materials. From the perspective of production raw materials, wood-plastic composite materials slow down and avoid the pollution of plastic waste, and also avoid the environmental pollution caused by bagasse stacking and incineration. At the same time, composite materials have both the advantages of wood and plastic: ①Good processing performance. Wood-plastic composites contain plastics and fibers, so they have processing properties similar to wood. They can be sawed, nailed, and planed with woodworking tools, and their nail-holding power is significantly better t...

AI Technical Summary

Problems solved by technology

At present, there are about 1Mt of recyclable waste in society every year in our country, about 0.2Mt is actually used, and 0.8Mt is not recycled. Most of the waste is disposed of in landfill, which not only causes secondary pollution. Secondary pollution, also caused extreme waste of materials