Effect of nano TiO2 on the performance of oral adhesive
The oral adhesive was prepared by using 2,4,6-trimethylbenzoyl diphenyl phosphine oxide as the photoinitiator,methyl methacrylate as the monomer,white carbon black as the reinforcing filler,and nano titanium dioxide(TiO2)particles as the antibacterial filler.The effects of nano TiO2 size and addition amount on the mechanical and antibacterial properties of the adhesive were studied.The research results showed that,(1)The size of nano TiO2 was an important factor affecting the mechanical properties of adhesive,and it was more suitable to use TiO2 with a particle size of 30 nm for filling.(2)The addition amount of nano TiO2 was another important factor affecting the mechanical properties of adhesive.When the addition amount of TiO2 was 5.0％,the mechanical properties of the adhesive were significantly improved.(3)The size and addition amount of nano TiO2 were important factors affecting its antibacterial performance.When the particle size of nano TiO2 in the adhesive was 30 nm and the addition mass fraction was 5.0％,the antibacterial rate reached 97.46％,meeting the requirements of industry's antibacterial rate standard.
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