Efficient preparation of novel fluoroalkyl end-capped oligomers/titanium dioxide nanocomposites

Novel fluoroalky end-capped oligomers/titanium dioxide nanocomposites were prepared by the hydrolysis of titanium isopropoxide in the presence of fluoroalkyl end-capped N-(1,1-dimethyl-3-oxobutyl)acrylamide oligomer [R(F)-(DOBAA)(n)-R(F)], fluoroalkyl end-capped N,N-dimethylacrylamide oligomer [R(F)-(DMAA)(n)-R(F)], and fluoroalkyl end-capped acrylic acid oligomer [R(F)-(ACA)(n)-R(F)] in tetrahydrofuran under mild conditions. In these fluorinated oligomers, R(F)(ACA)(n)-R(F) oligomer is more effective for the preparation of the corresponding oligomers/titanium dioxide nanocomposites, and this oligomer can afford the expected fluorinated titanium dioxide nanocomposites in higher isolated yields. In addition, R(F)(ACA)(n)-R(F)/titanium dioxide composites are nanometer size-controlled very fine nanoparticles (14-48 nm), and exhibited a good dispersibility not only in water but also in traditional organic solvents. Fluoroalkyl end-capped oligomers/titanium dioxide nanocomposites were also applied to the surface modification of the common organic polymers such as poly(methyl methacrylate) to exhibit a good oleophobic and hydrophilic characteristics on the surface. POLYM. COMPOS., 30:1848-1853,2009. (C) 2008 Society of Plastics Engineers