Method of preparing polyvinyl wood-plastic composite with cotton stalks

Abstract

The invention discloses a method of preparing polyvinyl wood-plastic composite with cotton stalks. The method comprises the following steps: soaking cotton stalks in a sodium hydroxide aqueous solution to alkalify the cotton stalks, washing the alkalified cotton stalks with distilled water, drying the washed cotton stalks, and smashing the dried cotton stalks to obtain cotton stalk powder; weighing and taking raw materials according to the mass ratio of cotton stalk powder to medium density polyethylene to azobisisobutyronitrile to dibutyltin oxide to silicone oil to chlorinated paraffin to dibasic lead phthalate being (20-60):(20-50):(0.05-1.8):(0.02-1.5):(15-20):(1-7):(0.5-4.0); stirring the mixed raw materials at a high speed to obtain mixed materials; performing reactive extrusion in a double-screw extruder to obtain extruded materials; pressing a mold containing the extruded materials on a press vulcanizer to obtain the polyvinyl wood-plastic composite. The method is easy to operate, and the prepared polyvinyl wood-plastic composite is nontoxic, environment-friendly, good in comprehensive performance and wide in 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 cotton stalks. Background technique [0002] Wood-plastic composite materials contain wood powder and hot-melt plastic raw materials. The hot-melt plastic raw materials can be industrial or domestic waste materials. Cotton stalks are an important agricultural waste. Wood flour for composite materials. From the perspective of production raw materials, wood-plastic products slow down and avoid the pollution of plastic waste, and also avoid the pollution of the environment caused by the piling and burning of cotton stalks. 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,...

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