A rapid method for preparing silica/wood composites

Abstract

The invention discloses a method for quickly preparing a silicon dioxide / wood composite material. The method comprises the steps as follows: (1) pretreatment of wood; (2) preparation of a silicon-containing precursor solution; (3) impregnation of the wood with the silicon-containing precursor solution through ultrasonic vibration; (4) ageing; and (5) drying. According to the method, the quick impregnation of the wood with the silicon-containing precursor solution in a sol-gel method process is realized through the ultrasonic vibration, the production technology is simple and quick, a lot of time is saved, the manufacturing cost is low, the quality is stable, and most of nano silicon dioxide can be deposited on cell walls of the wood and cell cavities can be filled with part of the nano silicon dioxide in the form of gel in a short time; the heat stability, the hygroscopicity and the waterproofness of the wood are significantly improved while environmental characteristics of the wood are maintained to the maximum extent, and mechanical properties and the dimensional stability are greatly improved, so that the wood with the soft texture can be used for preparing interior decorations and furniture materials and has the broad development prospect.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a method for rapidly preparing silica / wood composite materials. Background technique [0002] As a natural renewable resource, wood is light in material, small in volume and weight, high in strength, high in strength-to-weight ratio, low in sound and heat conductivity, good in electrical insulation of dry wood, good in color and beautiful in texture, and is an ideal indoor and outdoor building and decoration materials. However, wood is flammable and greatly affected by the environment. It is prone to discoloration, cracking, abrasion and bruising due to long-term contact with oxygen, light and moisture. It is also vulnerable to microorganisms and insects. Therefore, the modification of wood has been widely concerned for a long time. [0003] Traditional wood modification methods mainly include chemical modification and heat treatment. Chemical modification, such as adding su...

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Problems solved by technology

Although the above methods can use inorganic wood to endow it with good thermal stability, weather resistance, mechanical properties, etc., the production process is time-consuming, relatively high cost, and the composite is not uniform enough, which are limited in actual production and application.

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