Modification Of Titanium Dioxide Sol And Application In Textiles

Because of its chemical stability, non-toxic, low cost, photocatalyst and UVabsorption properties, Titanium dioxide has wide applications in semiconductor, catalyst,functional finishing of textiles and other fields. But now nano-TiO₂powders in textileapplication have more disadvantages, such as poor dispersion, poor combination withfabric and cracking, which are restricted in the textile fields.The subject modifies TiO₂sol under the premise of its synthesis, the final result isnearly neutral, good stability, better UV absorption and photocatalytic effect. In the processof systhesizing TiO₂sol, the ratio of TiCl₄and H₂O in the hydrolysis process, the solutiontime, temperature and the final pH value were considered. The crystal type and the averageparticle size were tested by XRD and nano-TiO₂particle size analyzer. Though degradingmethylene blue to compare the TiO₂photocatalytic effect. The fianal conditions of TiO₂solwere that TiCl₄concentration is1mol/L, solution temperature is60℃, solution time is3hand the final Ph value is1.5. Under these conditions, TiO₂particle isoelectric point is6.8and E_g is3.87eV. The electrode has a high redox potential. In the process of modifing TiO₂sol, PVP, PEG-1000, PEG-6000, CMC, SHMP, Sodium lauryl sulfate and KH550sevenmodifiers were choiced. The products were characterized by infrared spectra.Finally, KH550modified TiO₂sol were selected. In the application of textiles, thetextiles after finishing have UV resistant, VOC degradation performance.The mothod bresks the previous preparation power firstly, and then dispersed. At thesame time, in the process of modifing nano-TiO₂sol, the modifer can added directly. Aftermodified, the stability was increased, the connection with textile was strengthen and thetextile has a good washing resistance. This preparation method of nano-TiO₂sol willprovide guidance for industrial production.