Preparation method of multifunctional micro-nano structure modified wood

Abstract

The invention discloses a preparation method of multifunctional micro-nano structure modified wood, a modification solution A comprises the following components in parts by weight: 0.1-5 parts of a silane coupling agent, 1-20 parts of sodium silicate, 1-50 parts of furfuryl alcohol, 0.1-5 parts of a catalyst and 100 parts of deionized water, after a wood board is soaked in a soaking tank for a period of time, the modification solution A is absorbed by the wood board, and then the wood board is soaked in a soaking tank for a period of time; a proper amount of a modified solution B is added into a soaking tank, and through later-stage high-temperature drying, the modified solution absorbed to cell walls and cell gaps of the wood is promoted to be subjected to a cross-linking reaction with hydroxyl and carboxyl on the surface of lignocellulose of the wood to generate a micro-nano net structure, so that the mechanical structure of the wood is changed, and the mechanical property of the wood is improved. The hardness, the elastic modulus and the bending strength of the modified wood are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of wood modification, in particular to a preparation method of multifunctional micro-nano structure modified wood. Background technique [0002] With the continuous strengthening of natural forest protection, the ban on logging of natural commercial forests and the tightening of international timber import channels, forest harvesting has rapidly changed from natural forests to artificial forests, and artificial forests have gradually become the main raw materials for my country's timber industry. However, artificial fast-growing woods, such as poplar, eucalyptus, fir, pine, willow, and mahogany, are not efficiently utilized due to their soft material, low strength, and easy deformation, which cannot meet the needs of high-end wood products. In order to realize the effective allocation of plantation wood resources, the modification of plantation wood is more and more important. In the future, the focus of my...

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Problems solved by technology

[0005] However, although the mechanical properties and durability of the modified wood have been improved compared with the original wood, it will still expand and deform to a certain extent after long-term exposure to high temperature and high humidity, which will affect its service life.