Effect of fluorinated acrylate on the surface properties of cationic fluorinated polyurethane-acrylate hybrid dispersions

Cationic fluorinated polyurethane-acrylate hybrid dispersions were prepared by the copolymerization of styrene, butyl acrylate, and 2, 2, 3, 4, 4, 4-hexafluorobutyl methacrylate in the medium of crosslinked polyurethane via phase inversion polymerization. The said polyurethane was synthesized in acetone from 2, 4-tolyene diisocyanate, with Nmethyldiethanolamine as a hydrophilic chain-extender, trimethylolpropane as a crosslinker, and soft polyester diol block. The surface properties, immersion behaviors, particle size, and Zeta potential of the dispersions were investigated. The results show that the particle size of the dispersion particle is less than 450 nm and the Zeta potential is more than 32.0 mV. The addition of fluorinated acrylate can decrease surface free energy by more than 47.43%, and FPUA films cured at ambient conditions have lower surface free energy (less than 0.02,002 J/m^2). At the same time, there is an obvious mobility of fluorinated groups in the fluorinated polymer films.