Xia Yongxin, Yan Xiaoxing, Peng Wenwen
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 Aug 28;14(17):3534. doi: 10.3390/polym14173534.
An orthogonal experiment with four factors and three levels was designed. Nine different microcapsules were prepared by changing four factors: the core-wall ratio, emulsifier concentration, reaction temperature, and rotation speed. Through an analysis of the microcapsule yield and morphology, it was determined that the microcapsule of sample 6 performed the best in the orthogonal test and that the core-wall ratio was the largest factor affecting the microcapsule morphology and yield. In order to further optimize the performance of the microcapsules, single factor independent tests were carried out using the core-wall ratio as a single variable. It was found that the microcapsules with the core-wall ratio of 0.75:1 had good micro morphology and yield. The properties of the coating were the best when the microcapsules were added into the primer and the topcoat at the same time with an additional amount of 10.0%. The mechanical properties of the coating containing cellulose microcapsules and the coating without cellulose microcapsules were tested. Cellulose can enhance the toughness of the microcapsules, inhibit the generation of microcracks, and enhance the performance of the coating to a certain extent. The elongation at break of the coating with cellulose microcapsules was 9.49% higher than that without cellulose and was 11.1% higher than that without cellulose microcapsules.
设计了一个四因素三水平的正交试验。通过改变四个因素：芯壁比、乳化剂浓度、反应温度和转速，制备了9种不同的微胶囊。通过对微胶囊产率和形态的分析，确定样品6的微胶囊在正交试验中表现最佳，且芯壁比是影响微胶囊形态和产率的最大因素。为了进一步优化微胶囊的性能，以芯壁比为单一变量进行单因素独立试验。发现芯壁比为0.75:1的微胶囊具有良好的微观形态和产率。当微胶囊以10.0%的添加量同时加入底漆和面漆时，涂层性能最佳。测试了含纤维素微胶囊涂层和不含纤维素微胶囊涂层的力学性能。纤维素可以提高微胶囊的韧性，抑制微裂纹的产生，并在一定程度上提高涂层性能。含纤维素微胶囊涂层的断裂伸长率比不含纤维素的涂层高9.49%，比不含纤维素微胶囊的涂层高11.1%。
