Facile Preparation and Excellent Ultraviolet Shielding Application of Polyurethane‐TiO2 Composite Microcapsules

Abstract

AbstractIn 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.