Yan Xiaoxing, Tao Yu, Qian Xingyu
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 Sep 18;13(18):3167. doi: 10.3390/polym13183167.
Urea formaldehyde was used as wall material and waterborne coatings as a core material to prepare microcapsules. So as to explore the influence of mass ratio of core to shell, reaction temperature and standing time on the performance of microcapsules, the orthogonal test of three factors and two levels was put into effect. The orthogonal experimental results showed the mass ratio of core to shell was the most important factor. With the increase of the mass ratio of core to shell, the output and clad ratio of microcapsules increased first and then decreased. The microcapsule with the mass ratio of core to shell of 0.67:1 had better appearance, output, and encapsulation performance. The optical properties of waterborne wood coating with the microcapsules of waterborne coating as core materials did not decrease significantly, while the hardness, impact resistance, and toughness were improved. At the same time, the microcapsules have a certain self-repairing effect on coating micro-cracks. Compared with the properties of waterborne coatings with other microcapsules, the coating with waterborne coating as core material has better comprehensive performance. The results provide a new research idea for the performance enhancement and self-healing of wood waterborne coating.
以脲醛为壁材、水性涂料为芯材制备微胶囊。为探究芯材与壳材质量比、反应温度和静置时间对微胶囊性能的影响，进行了三因素两水平的正交试验。正交试验结果表明，芯材与壳材质量比是最重要的因素。随着芯材与壳材质量比的增加，微胶囊的产量和包覆率先增加后降低。芯材与壳材质量比为0.67:1的微胶囊外观、产量和包覆性能较好。以水性涂料微胶囊为芯材的水性木器涂料的光学性能无明显下降，同时硬度、耐冲击性和韧性得到提高。同时，微胶囊对涂层微裂纹有一定的自修复作用。与其他微胶囊水性涂料的性能相比，以水性涂料为芯材的涂料具有更好的综合性能。研究结果为木材水性涂料的性能增强和自修复提供了新的研究思路。
