Preparing technology of high-performance straw fiber plastic-wooden composite material

Abstract

The invention discloses a preparing technology of a high-performance straw fiber plastic-wooden composite material, and relates to the technical field of straw fiber-based plastic-wooden composite materials. The preparing technology comprises the following steps of: carrying out microwave drying treatment, high-temperature high-pressure steam explosion modifying treatment and inorganic boron nitride nanopowder coating modification pretreatment on rice straws which serve as the raw material, uniformly mixing the treated rice straws with thermoplastic resin, an interfacial modifier and other additives, carrying out microcellular-foaming extrusion molding on the mixture in a mould after uniform mixing, cooling and demoulding to obtain the high-performance straw fiber plastic-wooden composite material. According to the invention, a preparing method capable of effectively obtaining the high-performance straw fiber-based plastic-wooden composite material can be obtained by proceeding from the principle of interfacial atom combination and a microcellular foaming technology, planning to use a high-temperature high-pressure steam explosion technology and adopting a microwave drying technology and inorganic boron nitride nanopowder lubricant surface coating, so that harmless treatment of crop straws and efficient comprehensive utilization of resources can be realized.

Description

Technical field: [0001] The invention relates to the technical field of straw fiber-based wood-plastic composite materials, in particular to a preparation process of high-performance straw fiber-wood-plastic composite materials. Background technique: [0002] The amount of straw resources in China ranks first in the world, with an annual output of more than 700 million tons and a growing trend year by year. However, the utilization rate of this abundant straw resource in our country is very low, only 33% at present, mainly used for incineration, direct returning to the field and mixing with fertilizer for fermentation. According to statistics, the incineration of straw in my country produces more than 350 million tons of CO every year. 2 emissions, resulting in serious air pollution and greenhouse gas effects. [0003] With the strengthening of people's awareness of environmental protection, the need to protect forest resources and reduce the use of new wood is increasing,...

AI Technical Summary

Problems solved by technology

However, compared with wood-plastic composite panels, the physical properties of straw, including thermal stability, strength, water absorption, etc., still have certain defects. The application properties such as temperature are not up to the level of wood panels and wood-based panels, which is a technical bottleneck restricting the industrialization of such materials.

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