Journal
POLYMERS
Volume 13, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/polym13111674
Keywords
microcapsule; urea-formaldehyde resin; fluororesin; coating performance
Categories
Funding
- Natural Science Foundation of Jiangsu Province [BK20201386]
- Youth Science and Technology Innovation Fund of Nanjing Forestry University [CX2016018]
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The study fabricated microcapsules for self-repairing waterborne coatings at room temperature, and found that adjusting the ratio of core materials to shell material and the content of microcapsules can significantly improve the coating effect and surface smoothness of waterborne coatings, as well as enhance the aging resistance and overall performance of the film.
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.
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