Preparation of chemically-stable super-hydrophobic wood

Abstract

The invention provides a preparation method of chemically-stable super-hydrophobic wood, belonging to the technical field of functional modification of wood matrix surfaces. The preparation method comprises the following concrete steps: (1) synthesizing silicon dioxide microspheres by using a Stber method, and carrying out solution self-assembly on a low-surface-energy substance to obtain modifiedsilicon dioxide nanoparticles; (2) preparing a PDMS body mixed solution; (3) alternately dispensing SiO2 with particle sizes of 500 nm and 100 nm on the surface of wood to obtain a micro-nano structure surface; and (4) dispensing a PDMS layer for connection. According to the preparation method of the chemically-stable super-hydrophobic wood in the invention, the hydrophilic performance of the surface of the wood is changed, corrosion of corrosive liquid is effectively prevented, and the wood has good chemical stability. The problem that the stability of wood surface modification is poor is solved. The method is simple in preparation and low in cost, prolongs the service life of the wood, relieves the contradiction between supply and demand of the wood, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of solid surface wettability technology and functional modification, and specifically relates to the preparation of a chemically stable superhydrophobic wood. Background technique [0002] The wettability of solid surfaces has important applications in both academic research and practical applications. In nature, many surfaces, including lotus leaves and water strider legs, have water contact angles above 150°, which are called superhydrophobic surfaces. The self-cleaning behavior of these surfaces, known as the "lotus leaf effect," is thought to result from the hierarchical structure and delamination of low surface energy materials. There are many methods for preparing superhydrophobic surfaces, such as template method, soft printing method, chemical deposition method, colloidal self-assembly method, deposition method, sol-gel method, etc. Among them, the bottom-up colloidal self-assembly method is a simple and che...

AI Technical Summary

Problems solved by technology

However, a stable PDMS-based superhydrophobic surface has been prepared by template method, pulsed laser treatment, and soft printing technology. The method is limited by expensive equipment and cumbersome procedures. The structure of the superhydrophobic surface is very fragile, which hinders the scale of application.

Current super-hydrophobic materials not only have harsh experimental conditions, but also have low surface nano / micro-nano structure strength, easy aging, easy wear, and short service life.

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