Yang Zixin, Han Yan, Peng Wenwen, Wang Lin, Yan Xiaoxing
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). 2022 Sep 2;14(17):3638. doi: 10.3390/polym14173638.
In a particular temperature range, 1, 2-benzo-6-diethylamino-fluorane microcapsules (fluorane microcapsules) exhibit a good color-changing function. For the coating on wood surfaces, embedding fluorane microcapsules, good weather resistance, light retention, color retention, impact resistance, and wear resistance are essential. However, the effect of fluorane microcapsule content on its properties has not been verified. Therefore, in this paper, the orthogonal test is designed with the fluorane microcapsule content, drying temperature, and drying time as test factors to identify the most influential factors. Then, by embedding microcapsules into the waterborne coating on wood substrates, the performance of the waterborne topcoat was investigated. The results show that the color of the waterborne topcoat with fluorane microcapsules on a basswood () surface can change between yellow and colorless when the temperature rises and falls, achieving reversible thermochromism. The activation temperature was 32 °C, and the range of discoloration temperature was 30-32 °C. The topcoat with a 15% fluorane microcapsule content had the best comprehensive performance. The color difference was 71.9 at 32 °C, the gloss was 3.9% at 60°, the adhesion grade was 0, the hardness was 2H, the impact resistance was 10 kg·cm, the elongation at the break was 15.56%, and liquid resistance was outstanding. After aging tests, the color difference of the topcoat with 15% fluorane microcapsules was more obvious. The damaged area of the topcoat with the addition of 15% fluorane microcapsules was smaller, indicating it had a better aging resistance. The experimental results lay the foundation for the preparation of intelligence-indicating and decorative waterborne coating.
在特定温度范围内，1,2-苯并-6-二乙氨基荧烷微胶囊（荧烷微胶囊）具有良好的变色功能。对于木材表面涂层，嵌入荧烷微胶囊时，良好的耐候性、保光性、保色性、抗冲击性和耐磨性至关重要。然而，荧烷微胶囊含量对其性能的影响尚未得到验证。因此，本文以荧烷微胶囊含量、干燥温度和干燥时间为试验因素设计正交试验，以确定最具影响力的因素。然后，通过将微胶囊嵌入木材基材的水性涂料中，研究了水性面漆的性能。结果表明，椴木（）表面含有荧烷微胶囊的水性面漆在温度升降时颜色可在黄色和无色之间变化，实现可逆热致变色。活化温度为32℃，变色温度范围为30 - 32℃。荧烷微胶囊含量为15%的面漆综合性能最佳。32℃时色差为71.9，60°光泽度为3.9%，附着力等级为0，硬度为2H，抗冲击性为10 kg·cm，断裂伸长率为15.56%，耐液性优异。老化试验后，含15%荧烷微胶囊的面漆色差更明显。添加15%荧烷微胶囊的面漆受损面积更小，表明其具有更好的耐老化性。实验结果为制备智能指示和装饰性水性涂料奠定了基础。
