Yan Xiaoxing, Han Yan, Yin Taiyu
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China.
Polymers (Basel). 2021 May 21;13(11):1674. doi: 10.3390/polym13111674.
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.
为了使椴木上的水性涂料在室温下自行修复裂缝，将氟树脂和水性涂料嵌入脲醛（UF）树脂的壳结构中，通过原位聚合法制备微胶囊，并探讨了微胶囊对木材水性涂料的色度、光泽度、力学性能和修复效果的影响。结果表明，当微胶囊的芯材与壳材质量比为0.75时，涂层效果最显著；当微胶囊含量为1.0%时，颗粒团聚最少，表面最光滑。薄膜的光泽度与微胶囊含量呈负相关。微胶囊的芯材与壳材质量比和微胶囊用量对薄膜硬度和附着力有很大影响，但对耐冲击性影响较小。当微胶囊的芯材与壳材质量比为0.65，添加量为4.0-10.0%时，薄膜的耐老化性能改善最为显著。当微胶囊的芯材与壳材质量比为0.65，添加量为7.0%时，椴木板面漆膜的综合性能最为显著。本研究为具有自修复效果的氟树脂微胶囊在椴木板水性涂料中的应用提供了技术基础。
