Tuning photo-catalytic activities of TiO2 nanoparticles using dimethacrylate resins

Dental Materials : Official Publication of the Academy of Dental Materials
Jirun SunDrago Skrtic

Abstract

The unique photo-catalytic activities (PCAs) of titanium dioxide nanoparticles (TiO2 NPs) made them attractive in many potential applications in medical devices. The objective of this study is to optimize the benefits of PCAs of TiO2 NPs through varying chemical structures of dimethacrylate resins. TiO2 NPs were functionalized to improve the PCAs and bonding to the resins. The PCAs of TiO2 NPs were evaluated using electron paramagnetic resonance (EPR) and UV-vis spectroscopy to determine the amount of the radicals generated and the energy required for their production, respectively. The beneficial effects of the radicals were assessed through: (1) the improvement of degree of vinyl conversion (DC) and (2) modification of resin hydrophilicity. One-way ANOVA with a 95% confidence interval was used to indicate the significant differences between the experimental groups. EPR and UV-vis results clearly showed that the functionalization of TiO2 NPs enhanced PCAs in terms of generating radicals under visible light irradiation. The presence of hydroxyl and carboxylic acid functionalities played an important role in DC enhancement and hydrophilicity modification. The DC could be increased up to 22% by adding only 0.1wt% TiO2 NPs. Viscos...Continue Reading

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Citations

Nov 28, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Michele StürmerFabrício M Collares
Feb 25, 2020·Journal of the Mechanical Behavior of Biomedical Materials·Joanne Jung Eun ChoiJohn Neil Waddell
Nov 9, 2017·Dental Materials : Official Publication of the Academy of Dental Materials·Xiaohong WangJirun Sun

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