Transparent super-hydrophobicity wood coating and preparation method thereof

Abstract

The invention discloses a transparent super-hydrophobicity wood coating which comprises the following components in parts by weight: 20-50 parts of water dispersive polyurethane resin or water dispersive alkyd resin, 4.5-25 parts of nano silica sol, 3-16 parts of nano cellulose gel, 0.1-1 part of octadecyl trichlorosilane or tetrahydroperfluorodecyltrichlorosilane or stearic acid and 0-45 parts of nano talc powder or nano calcium carbonate. A preparation method of the transparent super-hydrophobicity wood coating comprises the following steps: adding matrix resin and filler into a stirring kettle, and stirring uniformly to obtain slurry; grinding the slurry with a sand mill; adding a low-surface energy substance and supported nano silica sol; performing ultrasonic sufficient mixing for 30 minutes to obtain the transparent super-hydrophobicity coating. The transparent super-hydrophobicity wood coating disclosed by the invention has the advantages of low cost, controllable process, adjustable size and good applicability and is suitable for a preparation method of large-area preparation of transparent super-hydrophobicity surface; the prepared super-hydrophobicity film has good self-cleaning property, antifouling property, hydrophobic property, oleophobic property and the like.

Description

technical field [0001] The invention relates to a transparent superhydrophobic wood coating and a preparation method thereof. The invention belongs to the technical field of modified paint preparation. Background technique [0002] With the in-depth reform of environmental protection regulations, the requirements for surface coatings of wood products are becoming more and more stringent. Water-based wood coatings have emerged in the coatings industry due to their advantages of not containing solvent-based organic volatiles. At present, the biggest problems of water-based coatings are the disadvantages of poor water resistance, slow drying speed of the coating film, and low hardness. [0003] Because the superhydrophobic surface has many unique surface properties: such as self-cleaning properties, antifouling properties, hydrophobicity, oleophobicity, low friction coefficient, etc., these special properties make it of great application value in many fields. If it is applied...

AI Technical Summary

Problems solved by technology

However, the silica sol prepared by the traditional process usually has a particle size of about 10-20nm, the shape is non-spherical and cannot be controlled, the impurity content is high, the interface between the particles is not clear, the concentration of silica is low, and it is stable under acidic or neutral conditions. Poor performance, short service life, more or less colored, few varieties, and the volume shrinkage of silica sol during the film forming process is relatively large, and the coating film is easy to crack

Therefore, its wide application is limited

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