In this work, butyl stearate, isophorone diisocyanate, and glycerol are used to prepare reticulated polyurethane microcapsules using interfacial polymerization. In addition, anatase nano‐TiO₂ is added to prepare TiO₂‐polyurethane phase change microcapsules during the polymerization process. Polarized light microscope, scanning electron microscope, Fourier‐transform infrared spectroscopy, thermogravimetric, differential scanning calorimeter, and other methods demonstrate the successful preparation of microcapsules, and microcapsules with different TiO₂ content have differences in morphology and performance. It is worth noting that the addition of TiO₂ enhances the thermal stability and mechanical strength of the prepared composite microcapsules. In addition, TiO₂ particles allow the microcapsules to have photocatalytic properties and ultraviolet shielding properties, and the prepared TiO₂‐polyurethane composite capsules show good catalytic degradation properties for methyl orange solution. Moreover, the ultraviolet absorption performance of the TiO₂‐polyurethane composite microcapsule coating is tested, and the results show that the strength of ultraviolet light is weakened after passing through the coating, indicating that the composite microcapsule can enhance the UV resistance of the coating. This work shows the preparation of multifunctional microcapsules and their potential applications in photocatalysis and UV resistance.

中文翻译：

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聚氨酯-TiO2复合微胶囊的简便制备及优异的紫外线屏蔽应用

在这项工作中，硬脂酸丁酯，异佛尔酮二异氰酸酯和甘油用于通过界面聚合制备网状聚氨酯微胶囊。此外，在聚合过程中添加了锐钛矿型纳米TiO ₂以制备TiO _{2 －}聚氨酯相变微胶囊。偏光显微镜，扫描电子显微镜，傅立叶变换红外光谱，热重分析，差示扫描量热仪和其他方法证明了微胶囊的成功制备，并且不同TiO ₂含量的微胶囊在形态和性能上存在差异。值得注意的是，TiO _2的添加增强了制备的复合微胶囊的热稳定性和机械强度。此外，TiO ₂颗粒使微囊具有光催化性能和紫外线屏蔽性能，并且制备的TiO _{2 －}聚氨酯复合囊对甲基橙溶液具有良好的催化降解性能。此外，TiO ₂的紫外线吸收性能对聚氨酯复合微胶囊涂层进行了测试，结果表明，紫外线穿过涂层后强度减弱，表明复合微胶囊可以增强涂层的抗紫外线性能。这项工作表明了多功能微胶囊的制备及其在光催化和抗紫外线中的潜在应用。