Research Of Nano-TiO₂ Modified Interior Building Latex Coating On Photocatalysis Degradation Of Formaldehyde

Formaldehyde is dangerous substance with high toxicity which can induce cancer and abnormality. People have paid more and more attention to superscale of formaldehyde released by indoor decoration. On the basis of briefly summarizing the research and application present of nano-composite latex coatings and photocatalysis capability of nano-TiO2, we presented a creative approach of modified interior building latex coatings by applying nano-TiO2 photocatalysis degradation of formaldehyde. Systematically studied the dispersancy of nano powder and the effect of factors such as nano-material's additive capacity,grain size,compound additive on the behavior of photocatalysis degradation of formaldehyde of interior building coating modified by nano-TiO2. And the effect of addition of nano-TiO2 to the weather resistance of modified latex coating was studied.According to the study on UV-Vis optical property of nano-powder materials we turn out that nano-TiO2 own higher UV absorbing capability and higher visible light diffuse reflection capability.According to the study of sedimentation experiments and measure the granularity of dispersoid by Malvern Mastersizer, the results showed that 5040 disperser and (NaPO3)6 had a better dispersancy.The results of photocatalysis degradation of formaldehyde of interior building latex coating modified by nano-TiO2 were higher than 40 percents in 24 hours. The ability of photocatalysis degradation was not enhanced by the addition of anatase nano-TiO2. The results showed that there was a better effect when addition of anatase nano-TiO2 is between 1 percent and 2 percents. As minishing of grain size, the effect...