Research Of Nano-TiO₂ Antibacterial Material And Antibacterial Coatings

With the progress of society, more and more people pay attention to environmental protection, many researchers began to study in the antimicrobial material. In the decoration materials of families, paint is one of indispensable raw materials, the development of environmental protection with antibacterial antifungal function is a coating of paint in the direction of industrial development.The project aims to develop antimicrobial mold, self-cleaning and other environmental features environmentally friendly anti-bacterial cleaning mold interior wall paint, the coating is mainly used in rural housing, the purpose is to effectively reduce air pollution indoor, played the role of anti-bacterial and mildew to improve indoor air quality. In this project, nano-TiO₂ as a raw material, zinc zeolite as a carrier, Ce ions as the doping ion, prepared by impregnation of zinc zeolite-Ce/TiO₂ antibacterial material, selected n(TiO₂/Ce²⁺), pH value, reaction time and calcinations temperature as four factors , the orthogonal optimal design to determine the best ratio of anti-bacterial material. Then the prepared antimicrobial material in two different forms to make environmentally friendly antimicrobial coatings mold paint, mold different environmentally friendly antimicrobial coatings have antibacterial properties, antifungal properties and the basic properties of coatings were tested and evaluation, and conduct cost analysis and coating process design, paint manufacturers were on-site preparation of antimicrobial coatings. The inhibition zone d0 as assessment indicators, the use of antibacterial inhibition zone method was evaluated antibacterial coating material and antibacterial effects, the use of GB/T 1741-1979(1989). By scanning electron microscopy, respectively from the molecular level of rare earth and zinc zeolite surface morphology of nano-TiO₂ materials and surface electronic structure and UV spectrum of antibacterials of zinc zeolite-Ce/TiO₂ photocatalytic effect.The results show that the antibacterial effect of four antimicrobial material factors, n(TiO₂/Ce²⁺) is 40:1, pH=3, the reaction time was 0.5h and the calcinations temperature is 300, the zinc zeolite-Ce/antibacterial properties of TiO₂ best antibacterial materials, when the inhibition zone diameter of 34.63mm. Antibacterial material will be 0.2% to 1.5% of the incorporation into the ordinary paint, with the incorporation of the increase in antibacterial effect also increases, when the incorporation of 1.0%, the optimum anti-bacterial effect and then increase with the incorporation of the antimicrobial effects become wores. The incorporation of 1.0% of the antimicrobial material added to the four different components of ordinary paint, the inhibition zone diameter of 18.55mm²5.33mm,meet the evaluation criteria, showed good antibacterial effects. Petri dish assay using anti-bacterial coating of mold-mildew properties, assessed by the 14d, when one of the best mold level 0 to 1 .Antimicrobial coating on mold were scrub resisitance, adhesion, chemical reagents and the viscosity of the test, preparation of the basic properties of antibacterial anti-mildew coating are in line with national standards.SEM studies of rare earth from the molecular level and zinc zeolite materials of nano-TiO₂ morphology and electronic structure of the surface, zeolite has a good channel, can be better absorbed nano-TiO₂, nano-TiO₂ modified raw materials, nano-TiO₂ as a carrier of zinc zeolite adsorption, distribution is more uniform, spherical particles remain, the diameter of about 100nm;by UV-visible spectrophotometer and the Ce²⁺ zinc zeolite modified nano-TiO₂ together, you can make nano-TiO₂ effective use of the range of light extended to the visible region, after modified Nano-TiO₂ photocatalytic performance enhancements.