Huang Nan, 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). 2023 Mar 30;15(7):1728. doi: 10.3390/polym15071728.
With the development of science and technology, the function of waterborne coatings has been advanced to a higher standard, which requires researchers to innovate and expand the research on them. Aloe-emodin is a natural material with antibacterial properties. Applying its antibacterial effect to the coating can enrich its function and meet the diversified needs of consumers. In this study, the urea-formaldehyde resin was used as the wall material and the aloe-emodin as the core material to prepare the microcapsules. The coating rate, yield, and morphology of the microcapsules were characterized. Through an orthogonal experiment and a single factor experiment, the optimization scheme of microcapsule preparation was explored. The results indicated that the optimum preparation process of aloe-emodin microcapsules was as follows: the mass ratio of core material to wall material was 1:15, the molar ratio of urea to formaldehyde was 1:1.2, the temperature of microencapsulation was 50 °C, and the stirring speed of microencapsulation was 600 rpm. On this basis, the aloe-emodin microcapsules with 0%, 1.0%, 3.0%, 6.0%, 9.0%, and 12.0% contents were added to the waterborne coating to prepare the paint films, and their influence on the antibacterial and optical properties of the waterborne paint films was explored. The results demonstrated that the aloe-emodin microcapsules had antibacterial activity. When the content was 6.0%, the comprehensive performance of the film was better. The antibacterial rate of the film against was 68.1%, and against it was 60.7%. The color difference of the film was 59.93, and the glossiness at 60° was 7.8%. In this study, the microcapsules that can improve the antibacterial performance of water-based coatings were prepared, which can expand the application of water-based coatings and provide a reference for the study of the functionalization of water-based coatings.
随着科学技术的发展，水性涂料的功能已提升到更高标准，这要求研究人员对其进行创新和拓展研究。芦荟大黄素是一种具有抗菌性能的天然材料。将其抗菌效果应用于涂料中可丰富涂料功能，满足消费者的多样化需求。本研究以脲醛树脂为壁材、芦荟大黄素为芯材制备微胶囊。对微胶囊的包封率、产率和形态进行了表征。通过正交试验和单因素试验，探索了微胶囊制备的优化方案。结果表明，芦荟大黄素微胶囊的最佳制备工艺如下：芯材与壁材的质量比为1:15，尿素与甲醛的摩尔比为1:1.2，微囊化温度为50℃，微囊化搅拌速度为600 rpm。在此基础上，将含量为0%、1.0%、3.0%、6.0%、9.0%和12.0%的芦荟大黄素微胶囊添加到水性涂料中制备漆膜，探讨其对水性漆膜抗菌性能和光学性能的影响。结果表明，芦荟大黄素微胶囊具有抗菌活性。当含量为6.0%时，漆膜的综合性能较好。该漆膜对[具体菌种1]的抗菌率为68.1%，对[具体菌种2]的抗菌率为60.7%。漆膜的色差为59.93，60°光泽度为7.8%。本研究制备了可提高水性涂料抗菌性能的微胶囊，可拓展水性涂料的应用范围，为水性涂料功能化研究提供参考。
