The Dispersion and Use of Nanometer TiO2 in Polyacrylate Coating Agent

In order to improve the UV protection of fabrics by coating with nanometer TiO2, different dispersion methods such as dispersants, mechanical agitations were all used for dispersing the nanometer TiO2 in PA (Polyacrylate) and the effects of dispersion and stability were evaluated by the visible light transmittance in this paper. The system prepared by the optimum dispersion processing was used to coat the cotton fabrics and the effects of the concentration of TiO2 and the coating times on the UPF and other properties of the coated fabrics were analyzed and compared with the initial fabrics in details. It was found that ionic dispersants had better dispersion effect than that of the non-ionic ones, while the dispersion had no obvious improvement with the concentration of the dispersant increased from 4% (o. w. f.) to 8% (o. w. f.). The agitation from both mechanical and ultrasonic was good for the dispersion under certain conditions. For the coated fabrics, their UPF increased with the concentration of TiO2 or coating times.