Abstract
The thermoplastic polyurethane elastomer modified by nano-TiO2 particles was synthesized by in-situ polymerization, and the composite film is used for invisible dental device. The effects of different contents of nano-TiO2 on the transparency and mechanical properties of the composite film were investigated. The results show that the nano-TiO2 treated with silane coupling agent is uniformly dispersed in the TPU matrix. Compared with the pure TPU, the addition of nano-TiO2 makes the transparency decrease and mechanical properties improve significantly. The surface of the film was modified with dopamine and then connected with antimicrobial peptides. The results of antibacterial experiments show that the modified films have excellent antibacterial properties.
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