Pretreatment method of wood flour suitable for plastic filling

Abstract

The present invention discloses a high-temperature treatment method of wood flour, which is characterized by adding wood flour and water at a weight ratio of (1:5)-(1:20) into a container, boiling, placing the boiled wood flour in a vacuum oven, carrying out vacuum high-temperature treatment at the temperature of 100-110 DEG C for 6-50 hours and drying at the temperature of 100-110 DEG C to constant weight to obtain treated wood flour. The PP (polypropylene)-based wood-plastic composite material prepared from the wood flour treated by the high-temperature treatment method has mechanical properties equivalent to the PP-based wood-plastic composite material containing a compatibilizer PP-g-mah (polypropylene-graft-maleic anhydride), and the simultaneous use of the wood flour and PP-g-mah greatly improves the mechanical properties of the PP-based wood-plastic composite material. The high-temperature treatment method has the advantages of simple used utensil, simple operation process, excellent performance of the prepared materials, no pollutant generation during the production process and reusable boiled wastewater and is an environmentally-friendly high-efficiency wood flour treatment mode.

Description

Technical field: [0001] The invention relates to a wood powder pretreatment method, in particular to a wood powder pretreatment method used in the production of wood powder-filled polypropylene (PP) plastic polymer composite materials. Background technique: [0002] Nowadays, the plastic industry is developing rapidly and is widely used in various fields. In order to meet different requirements, various plastic alloys, polymer composite materials filled with rigid particles such as inorganic particles and fibers have come out one after another, and wood powder, Plant fibers such as straw and rice husks are filled with thermoplastic resins, and wood-plastic composites (WPC), which are processed by extrusion, injection molding and other plastic molding methods, have also become a research topic due to their excellent performance and convenient processing methods. one of the hotspots. Wood-plastic composite material combines the characteristics of wood and plastic materials. I...

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Problems solved by technology

The pretreatment of wood powder does not use expensive coupling agents or compatibilizers in production, but from the perspective of material properties, the effect of wood powder pretreatment is not as good as that of directly adding coupling agents or compatibilizers , and alkali treatment and surface grafting treatment will produce polluted waste liquid, which is not conducive to environmental protection

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