Deng Jinzhe, 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). 2025 Jul 19;17(14):1985. doi: 10.3390/polym17141985.
Tung oil, as dry oil, can quickly dry and polymerize into tough and glossy waterproof coatings, with a very high application value. Tung oil was used as a core material to prepare Tung oil microcapsules coated with chitosan-Arabic gum, and the preparation process of the microcapsules was optimized. The effect of adding a UV coating on the performance of the microcapsules was explored. Under the conditions of a core-wall mass ratio of 0.5:1.0, pH value of 3.5, mass ratio of chitosan to Arabic gum of 1.0:4.0, and spray drying temperature of 130 °C, Tung oil microcapsules coated with chitosan-Arabic gum had a higher yield and coverage rate, which were 32.85% and 33.20%, respectively. With the increase of the spray drying temperature during preparation, the roughness of the coating first increased and then decreased, the visible light transmittance decreased first and then increased, and the glossiness showed an overall downward trend. The self-repairing rate decreased gradually. When the microcapsules #11 were added to the UV topcoat at 5%, the coating can obtain excellent comprehensive properties; the roughness was 0.79 μm, elongation at break was 5.04%, visible light transmittance was 77.96%, gloss loss rate was 10.95%, and self-repairing rate was 20.47%.
桐油作为干性油，能迅速干燥并聚合成坚韧且有光泽的防水涂层，具有很高的应用价值。以桐油为芯材制备壳聚糖-阿拉伯胶包覆的桐油微胶囊，并对微胶囊的制备工艺进行了优化。探讨了添加紫外光涂层对微胶囊性能的影响。在芯壁质量比为0.5:1.0、pH值为3.5、壳聚糖与阿拉伯胶质量比为1.0:4.0、喷雾干燥温度为130℃的条件下，壳聚糖-阿拉伯胶包覆的桐油微胶囊具有较高的产率和包覆率，分别为32.85%和33.20%。随着制备过程中喷雾干燥温度的升高，涂层粗糙度先增大后减小，可见光透过率先降低后升高，光泽度总体呈下降趋势，自修复率逐渐降低。当微胶囊#11以5%的比例添加到紫外光面漆中时，涂层可获得优异的综合性能；粗糙度为0.79μm，断裂伸长率为5.04%，可见光透过率为77.96%，光泽损失率为10.95%，自修复率为20.47%。
