Method for improving hydrophobicity and stability of wood based on nanometer titania

Abstract

The invention discloses a method for improving hydrophobicity and stability of wood based on nanometer titania. Low-viscosity urea resin, nano graphene and nanometer titania serve as materials, a micron-order rough texture structure of the wood is combined, a film of a micro-nano second-level concave-convex rough texture structure is established on the surface of the wood through a sol-gel method, lyophobic substances are modified on the film of the micro-nano second-level concave-convex rough texture structure, and a layer of lyophobic film is attached to the surface of the wood. The method has the beneficial effects that wood cell cavities are filled with the low-viscosity urea resin so that water inflow can be prevented; meanwhile, a fiber chemical group of the wood and the urea resin are subjected to the chemical reaction, cellulose framework chemical bonds are mutually combined, and firmness between the urea resin and the wood is enhanced; and by utilization of nanometer titania particles and the micron-order rough structure of the wood, a second-level convex-concave rough film structure simulating the surface of a lotus leaf is prepared, and the purpose of preventing water inflow is achieved.

Description

technical field [0001] The invention relates to a wood modification treatment method, in particular to a method for improving wood hydrophobicity and stability based on nano-titanium dioxide. Background technique [0002] Wood is widely used in the fields of construction, furniture manufacturing, and interior decoration. However, because of its rich pore structure and a large number of hydrophilic groups, wood has strong hygroscopicity and water absorption, which can cause wood to shrink and shrink. Swelling, leading to defects such as warping, deformation, cracking, etc. Therefore, before the use of wood or wood products, it is generally necessary to do hydrophobic protection treatment. Most traditional hydrophobic treatment methods, such as chemical reagent impregnation modification or surface coating, can improve the hydrophobicity of wood to a certain extent, but they cannot fundamentally inhibit the intrusion of water into wood, and it is difficult to achieve long-term ...

AI Technical Summary

Problems solved by technology

Using nanoparticles to roughen the substrate, that is, to introduce nanoparticles into the surface of the substrate by using the sol-gel method, can also successfully deposit a hydrophobic inorganic-organic thin layer on the surface of the material. Through this method, moisture and water vapor The absorption of water can be reduced to a certain extent, but this method cannot completely prevent the entry of water