A kind of preparation method of mildew-resistant bamboo unit/bamboo product

Abstract

The invention provides a method for preparing a mildew-resistant bamboo unit / bamboo product. The method includes the following steps: firstly drying the bamboo, then performing high-temperature heat treatment in a carbonization kiln, and continuously spraying atomized water to keep the kiln slightly positive. Then, the reducing sugar in the bamboo heat treatment wastewater is precipitated to obtain wastewater a; then the wastewater a is oxidized with an oxidant or UV ultraviolet radiation to obtain an anti-mold impregnation solution; finally, the bamboo unit is placed in an anti-mold Immerse in the dipping solution, or directly paint the anti-mildew impregnating solution on the surface of the bamboo product to prepare the anti-mold bamboo unit / bamboo product. The invention firstly uses bamboo high-temperature heat treatment waste water in bamboo anti-mold treatment, and the color and bacteriostasis of bamboo after anti-mold treatment can achieve the effect of high-temperature heat treatment, and retain the strength of bamboo and save heat energy. The impregnation process adsorbs most of the chroma, phenols, organic acids and other organic substances in the waste water of high-temperature heat treatment of bamboo, which reduces the difficulty and cost of waste water treatment.

Description

technical field [0001] The invention belongs to the technical field of anti-mildew bamboo materials, and in particular relates to a method for preparing an anti-mold bamboo unit / bamboo product. Background technique [0002] Nutrients are abundant in bamboo, and the extracts of cold water, hot water and 1% NaOH (21-31%) are much higher than that of wood, wherein starch content (2%-6%, less than 2% of wood), reducing sugar (2% ), protein (1.5-6%), and fat wax (2-4%) are all food sources for moldy bacteria. The surface of mildewed bamboo is infected with black, brown and other pigments, and the discoloration bacteria also penetrate deep into the interior of the bamboo to cause color changes such as cyan, brown or black inside and outside, which affects the appearance and use value. According to incomplete statistics, my country's annual mildew The resulting loss of bamboo accounted for about 10% of the total output. The current antifungal protection mostly uses biotoxic chemic...

AI Technical Summary

Problems solved by technology

However, after high-temperature heat treatment, the nutrients in the bamboo are degraded, and the mechanical strength is also lost to a certain extent. Especially for high-temperature heat-treated bamboo, the mechanical strength loss is relatively large, and the surface becomes brittle.

[0004] On the one hand, the wastewater produced by high-temperature heat treatment has high chroma (about 30,000 times), high soluble sugar content (about 10%), chemical oxygen demand (COD about 300,000 mg / L) and biological oxygen demand (BOD about 0.7 10,000 mg / L), containing harmful substances such as phenols (total phenol content about 1.5 mg / mL), difficult to handle

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