Radiation polymerization, crosslinking and grafting synergistic preparation method of Chinese poplar or Chinese sycamore or Chinese pine wood-plastic composite material

Abstract

The invention discloses a method for preparing a Chinese poplar or sycamore or pine wood and plastic composite material by adopting the radiation polymerization, crosslinking and grafting jointly. The method has the following steps of: pre-treatment, monomer impregnation, constant temperature irradiation under the protection of nitrogen and post-treatment and specifically comprises the following steps: (1) preparing the Chinese poplar or sycamore or pine wood serving as the basic material into blanks with appropriate sizes, drying in a drying room, and putting the treated blanks in an impregnating and radiating product box; (2) impregnating by methyl methacrylate, other acrylic acid derivatives and related assistants, introducing protection nitrogen, and increasing the pressure, wherein the impregnation rate of a monomer is 40-170%; (3) radiating at the room temperature under the nitrogen protection, wherein the absorbed dose is 15kGy; and (4) performing aftertreatment: polishing the surface of a radiated wood and plastic composite material to prepare for processing the composite material to floor boards and other products. The fast-growing readily-available low-grade wood such as the Chinese poplar wood is used for preparing the wood and plastic composite material by adopting the radiating, the crosslinking and the grafting, and the wood and plastic composite material has high hardness, good wear resistance, low hygroscopicity and corrosion resistance, can be used for replacing the expensive high-quality wood so as to meet various use requirements.

Description

technical field [0001] The invention relates to the technical field of wood-plastic composite materials, in particular to a synergistic preparation method of radiation polymerization, cross-linking and grafting of Chinese poplar wood, Chinese sycamore wood or Chinese pine wood-plastic composite materials. Background technique [0002] Wood-plastic composites WPC (wood-plasticcomposites) is a type of composite material made by blending wood cellulose and plastic (one or more plastics) or impregnating ordinary low-density wood with organic monomers through polymerization. The polymerization and grafting process can be initiated by chemical method (catalyst method) or radiation method. There are two types of WPC, one is wood fiber, wood powder, shavings, sawdust, plant fiber mixed with thermoplastics such as PE, PP, PVC, etc. It is made by impregnating wood with monomer and then initiating monomer polymerization, crosslinking and grafting. Preparation of WPC by means of radia...

AI Technical Summary

Problems solved by technology

In China, the industrial application of this technology is still blank

Images