Study On Organic Modification Of Titanium Dioxide And Hydrolysis Of Titanyl Sulfate

Titanium dioxide is a white pigment with superior performance. It’s widely be used inorganic systems. In order to apply titanium dioxide to organic phase effectively, it’s necessary tomake further organic surface treatment of titanium dioxide for the limited surface properties.Due to the quality of titanium dioxide is closely to the particle size and distribution. It’simportant to control the hydrolysis rate during the production process of titanium dioxide.This research utilize electric conductivity as an evaluation index of hydrolysis behavior ofvinyl triethoxy silane(A-151). And use polymerization efficiency as an evaluation index ofstyrene polymerization. First, utilizing A-151to modified industrial grade titanium dioxide andgrafted the organic fraction onto the surface of the powder. That based on the above hydrolysisinformation. Then take advantage of the organic part of powder as a middle bridge.Polymerization reaction is controlled by the addition of initiator to prepare core-shell structurematerials. The shell was formed of polystyrene and wrapped on the surface of titanium dioxide.IR analysis shows the characteristic absorption peak message to corresponding functional groupsof the modified part. SEM test shows that the dispersion of modified powder in the organic phaseimproved significantly.The stability of titanium solution was chose as an evaluation index of hydrolysis rate.Preliminary exploration the experimental conditions to prepare mica titanium pearlescentpigments. Pearlescent pigment has better coated effect when utilized sodium hydroxide solutionto control the hydrolysis rate than urea that observed by SEM. XRD analysis shows thatSnCl4·5H2O will reduce crystal transition temperature of TiO2significantly during calcination.