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

Abstract

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.

Research on the Application of Titanium Dioxide Nanotubes in Insulating Resins

“…For this purpose, we use KH-550 coupling agent to modify the surface of hydrophilic nano titanium dioxide, improving the aggregation and dispersion of titanium dioxide nanotubes in the insulation paint matrix. Then, the modified titanium dioxide nanotubes are compounded with flame retardant insulation paint, and it is expected that the compounded flame retardant system can prepare flame retardant insulation paint with good comprehensive performance with low addition amount [2,3]. Therefore, this study aims to incorporate titanium dioxide into the insulation paint, which can be filled into the defects of polymers to improve the flame retardancy, toughness, thermal stability, corrosion resistance, and wear resistance of the insulation paint [4,5].…”

Preparation of High Thermo-Stability and Compactness Microencapsulated Phase Change Materials with Polyurea/Polyurethane/Polyamine Three-Composition Shells through Interfacial Polymerization

“…Yin et al selected tetraethyl orthosilicate (TEOS) as functional shell-forming monomers to enhance the thermal stability and compactness of traditional polyurea MicroPCMs [ 25 ], and the result indicated that the smoothness and compactness of both polyuria-SiO 2 and polyurethane-SiO 2 microcapsules was enhanced slightly when compared with that without TEOS. Hong et al [ 26 ] prepared polyurethane-TiO 2 microcapsules through interfacial polymerization, and the result indicated that the addition of TiO 2 enhances the thermal stability and mechanical strength of the prepared composite microcapsules. Therefore, the preparation of composite shell microcapsules has become a research hotspot and point of focus in recent years.…”