Abstract
In order to self-repair the cracks of waterborne coatings on Basswood at room temperature, with fluororesin and waterborne coatings embedded in the shell structure of urea formaldehyde (UF) resin, the microcapsules were fabricated via in-situ polymerization, and the effect of microcapsules on the chroma, gloss, mechanics and repair effect for waterborne coatings on wood was discussed. The results indicated that the coating effect was the most significant when the ratio value of the core materials to the shell material of microcapsules in mass was 0.75, and the agglomeration of particles was the least and the surface was the smoothest when the content of microcapsules was 1.0%. It was negative between the gloss of the film and microcapsule content. The ratio value of the core materials to the shell material in mass and the amount of microcapsules had great influence on the film hardness and adhesion, but had little effect on the impact resistance. When the ratio value of the core materials to the shell material of microcapsules in mass was 0.65 and the addition amount was 4.0–10.0%, the aging resistance of the film was improved most significantly. When the ratio value of the core materials to the shell material of microcapsules in mass was 0.65 and the addition amount was 7.0%, the overall properties of topcoat film on Basswood board was the most significant. It is for the application of fluororesin microcapsules possessing self-repairing effect in waterborne coating on Basswood board that a technical groundwork is provided by this study.
Highlights
The film of waterborne coatings has the characteristics of stable property, high density, easy repairability and excellent anticorrosion performance [1,2,3]
It is found that waterborne coatings have some disadvantages such as poor water resistance and mechanical properties [10]
Because wood materials are not resistant to high-temperature baking, the application of fluororesin film-forming at ambient temperature in microcapsule technology has certain research significance for waterborne self-repairing coatings on wood surface
Summary
The film of waterborne coatings has the characteristics of stable property, high density, easy repairability and excellent anticorrosion performance [1,2,3]. Because wood materials are not resistant to high-temperature baking, the application of fluororesin film-forming at ambient temperature in microcapsule technology has certain research significance for waterborne self-repairing coatings on wood surface. Yan et al have preliminarily explored the application of microcapsule self-healing technique in coatings, and applied microcapsules in waterborne coatings for better comprehensive performance [14,30]. Based on this foundation, the microcapsules with several different ratios of the core materials to the shell material in mass were fabricated using UF resin as shell material, the integrated body of vinylidene fluoride resin and waterborne coating as core material. 20.00 20.00 20.00 that the self-healing effect of waterborne coatings with fluororesin microcapsules at room temperature, and the effects on the optical, mechanical and aging properties of waterborne coatings on Basswood board were explored, which provided technical reference for the self-healing ability of waterborne coatings on the surface of wood products
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