PREPARATION OF EPOXY COPOLYMER@TIO_2 PICKERING EMULSION AND ITS ANTIBACTERIAL ACTIVITY

摘要

Acrylate-based copolymers were applied to prepare functional coatings as acrylic resins are environment-friendly, showing excellent and resistances against weathering, acid, alkali and corrosion. We found that properties of acrylate-based copolymers could be improved after modification. In this paper, a novel antibacterial pickering emulsion, epoxy copolymer at nano-TiO_2 (Ep@NT) was successfully synthesized, in which emulsion stability was provided by nano-TiO_2 in Pickering emulsion polymerization. The average particle size and morphology of the Ep@NT particle were characterized by dynamic light scattering (DLS), scanning electron microscope (SEM) and transmission electron microscopy (TEM), whose components were also confirmed by FT-IR and thermal gravimetric analysis (TGA). Moreover, the relationship between stability of Ep@NT and contents of glycidyl methacrylate (GMA), solution pH value, m_(BA)/m_(St) ratio, nano-TiO_2 content were investigated. Furthermore, the mechanism of forming composite particles was suggested by monitoring the particle size changes in time. The obtained nanocomposite emulsion with nano-TiO_2 showed better biocompatibility and displayed excellent antibacterial performance under the indoor light irradiation. Therefore, Ep@NT can be applied to prepare functional interior coatings. This work was supported by the NSFC (No. 21364012, 21263024), PCSIRT (IRT1177) and Res Fund for Postgraduate Tutors in Inst Higher Edu Gansu Prov China (1201-15).