Low-temperature thermal modified wood based on catalytic action of exogenous phosphoric acid and manufacturing method thereof

Abstract

In order to solve the problems of high temperature, long time, obvious reduction of wood mechanical properties after acid heat treatment, corrosion pollution of strong acid waste liquid to instruments and environment and the like in the traditional wood heat treatment process at present, the invention provides low-temperature thermal modified wood based on catalytic action of exogenous phosphoric acid and a manufacturing method thereof. The manufacturing method comprises the steps of raw material processing, primary drying, exogenous phosphoric acid solution preparation, phosphoric acid solution treatment, secondary drying and low-temperature heat treatment. According to the invention, exogenous phosphoric acid is used as a catalyst to treat wood at a low temperature, so that the dimensional stability of the modified wood can be remarkably improved and the mechanical property loss can be reduced on the basis of reducing the heat treatment temperature and shortening the treatment time, and the surface color can also achieve the effect of the traditional high-temperature heat treatment wood; and corrosion and damage of a metal container can be avoided by using phosphoric acid, and the recycled waste liquid can be used as an agricultural phosphate fertilizer and a raw material for producing a feed nutritional agent, so that the production process with the aims of environmental protection, recoverability and sustainable utilization is realized.

Description

technical field [0001] The invention relates to the field of material processing, and relates to a preparation method of heat-treated wood, in particular to a low-temperature heat-modified wood based on the catalysis of exogenous phosphoric acid and a manufacturing method thereof. Background technique [0002] As an excellent green ecological environment material, wood has excellent characteristics such as environmental temperature and humidity adjustment, easy processing, and strong plasticity, and is widely used in various fields. However, wood has defects such as poor dimensional stability, easy deformation and cracking, and biological degradation. Especially the fast-growing wood for artificial forests that has slowed down the shortage of natural forest resources in my country has the characteristics of low density, low strength, and easy decay due to fast growth and short cycle. and other problems further limit its application range. Therefore, it is necessary to adopt ...

AI Technical Summary

Problems solved by technology

[0005] This invention aims to solve a series of defects existing in the existing wood modification process, thereby proposing a low energy consumption, high efficiency, short cycle, green and environmental protection based The manufacturing method of low-temperature heat treatment of wood by exogenous phosphoric acid catalysis, as shown in attached Figure 1 , a heat-treated wood with low mechanical loss and high dimensional stability can be prepared

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