Surface Modification of Nano-TiO_2 by in-situ Grafting Polymerization of Butyl Methacrylate

Silane coupling agent was used to introduce polymeric groups containing CConto the surface of nano-TiO2 particles by self-assembly technique.Then in-situ grafting polymerization was carried out between the functionalized particles and butyl methacrylate monomer to modify the surface of nano-TiO2.The effects of different reaction conditions on the grafting degree were studied,and the optimal conditions for the experiment were 5∶6 the ratio of toluene to butyl methacrylate(BMA),0.5% initiator,0.125 mol/L of the modified nano-TiO2,3 h reaction time,and 90 ℃ reaction temperature,and the grafting degree was 13.9%.FTIR,TG and UV-Vis results showed that new organic chains were introduced onto the surface of nano-TiO2,and the dispersion stability of the nano-TiO2 in organic phase was obviously improved.