Preparation and Characterization of Nano-TiO2/SiO2 Composite Particles
Nano-TiO2 can be used as ink connecting materials to improve the UV resistance due to the ability to absorb ultraviolet light of the nano-TiO2. However, the photocatalytic action of TiO2 will reduce the application performance of the ink. The nano-SiO2 coating of nano-TiO2 can block the direct contact between nano-TiO2 and the resin, which not only reduces the photocatalytic performance but also retains the ultraviolet absorption. Therefore, nano-TiO2/SiO2 composite particles were prepared using polyvinyl pyrrolidone (PVP) and 4-vinylpyridine (4VP) as dispersants. The results were shown by SEM, FT-IR, and XRD analysis. The results show that nano-SiO2 can better encapsulate nano-TiO2 when the PVP amount is 2 g, the 4VP amount is 2 ml, the titanium and silicon ratio is 1:2, and the ammonia amount is 5 ml. This study plays an active role in improving the UV resistance of inks.
KeywordsNano-TiO2/SiO2 PVP 4VP UV resistance
This work was supported in part by NSF of the Science and Technology Department of Shaanxi Province under Grant Nos. 2016JM5068, NSF of the Science and Technology Department of Shaanxi Province under Grant Nos. 2018JQ5100, NSF of the Key Laboratory of Shaanxi Provincial Department of Education under Grant Nos. 15JS075 and Shaanxi Collaborative Innovation Center of Green Intelligent Printing and Packaging.
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