Overall hydrophobic timber and preparation method thereof

Abstract

The invention relates to a preparation method of an overall hydrophobic timber. The timber is dipped by using alkyl isocyanate and dimethylformamide mixed solution, so that alkyl is grafted to a cell wall of the timber through a carbamate key. The method uses a self micron / nanometer roughness structure of the timber as basis, and grafts the alkyl to the cell wall of the timber through the carbamate key to form a low-surface-energy substance; a surface water drop contact angle thereof is about 147-151 degrees; the timber is sawn off in the cross section direction; and a water drop contact angle on the internal surface is about 147 degrees. The overall hydrophobic timber has the performances of mechanical wear resistance and chemical corrosion resistance; and in addition, the related preparation method is simple in steps, excellent in controllability, short in preparation period and easy to realize reaction conditions.

Description

technical field [0001] The invention relates to the technical field of wood, in particular to an integral hydrophobic wood, and also to a preparation method of the integral hydrophobic wood. Background technique [0002] Inspired by the lotus leaf effect in nature, superhydrophobic surfaces (contact angles between solid surfaces and water droplets greater than 150°) have attracted widespread attention due to their excellent water resistance, anti-fog, anti-icing, anti-corrosion and self-cleaning properties. application prospects. [0003] In the past few decades, a variety of matrix materials have been used to prepare superhydrophobic surfaces, such as metals, glass, paper, fabrics, and polymers. Unlike the above-mentioned materials, wood itself is a kind of superhydrophobic surface The heterogeneous materials composed of cellulose, hemicellulose and lignin form the original micro / nano structure because of their own anatomical structure and porosity. [0004] As we all kno...

AI Technical Summary

Problems solved by technology

However, on the one hand, the preparation process of these existing methods is complex, expensive, and difficult to industrialize

On the other hand, a large number of studies have focused on the superhydrophobic construction of wood surfaces, that is, the construction of a superhydrophobic coating on the wood surface. This superhydrophobic coating will inevitably experience mechanical wear and chemical corrosion during actual use. As a result, the coating is worn away and corroded, and the wood completely loses its superhydrophobic properties