Preparation method of high-hydrophobicity and self-cleaning wood

Abstract

The invention discloses a preparation method of a high-hydrophobicity and self-cleaning wood and aims at mainly solving the problems that a modifying agent used in the existing wood modifying method is high in toxicity and capable of changing the color of the wood and has odor, the treatment process is complex, and only the single performance of the wood can be improved. The method comprises the steps of mixing fluorine-containing polymerizable monomer, an unsaturated monomer, fluorine-containing modified POSS nanoparticles, a tetrahydrofuran solvent and an initiator to obtain an impregnation liquid; and then, adding the wood and the impregnation liquid into a reaction tank, carrying out pressurization treatment to inject the impregnation liquid into a wood pore structure, then, wrapping a test piece and aging at room temperature and normal pressure, and next, carrying out heating treatment and vacuum drying to obtain the high-hydrophobicity and self-cleaning wood. The method is simple, the color of the wood is not changed, no odor is generated, the parallel-to-grain compressive strength is 70-98MPa, and the anti-expansion rate obtained after the wood is continuously soaked for 200h reaches up to more than 65%; and the weight loss ratio obtained after the wood is eroded by fungi for 12 weeks reaches up to less than 6%, the water contact angle can be up to more than 140 DEG, the rolling angle is smaller than 20 DEG, and the high-hydrophobicity and self-cleaning wood can be widely used as an indoor / outdoor structural material and a decorative material.

Description

technical field [0001] The invention relates to a wood modification method, in particular to a method for preparing wood with high hydrophobicity and self-cleaning properties, and belongs to the technical field of wood processing. Background technique [0002] Because of its unique composition and honeycomb porous structure, wood is prone to swelling and deformation caused by water absorption, cracking and warping caused by water decomposition, decay and degradation caused by fungus erosion, and combustion degradation caused by heat. In order to prolong the service life of wood and improve its durability, people modify natural wood. The existing methods for wood modification are as follows: [0003] 1. Utilize vinyl monomers (Chinese patent application number 200710072699.2) or heterocyclic polymerizable monomers (international patent publication number CN1671526A in China) to form polymers to treat wood to improve the mechanical properties of wood. The modifier used in the...

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to solve the problems of high toxicity, peculiar smell, change of wood color, complicated treatment process and only single performance of wood in existing wood modification methods. Inspired by the self-cleaning properties caused by the micro-nano structure of lotus leaves And provide a kind of preparation method of high hydrophobicity self-cleaning characteristic wood, its hydrophobic contact angle can be as high as more than 140 °, rolling angle is less than 20 °

Images