Abstract:

A poly-fluoro-acrylate emulsion with core-shell structure was synthesized with poly (butyl acrylate-co-methyl methacrylate as the core, and poly (butyl acrylate-co-methylmethacrylate-co-bis(acryloxypropyl)tetramethyldisiloxane-co-tridecylfluooctylacrylate as the shell, via starved-semicontinuous seed emulsion polymerization. The morphology and thermostability of the core-shell latex particles and the influences of fluorine content and the amount of cross-linked agent on water-repellency, oil-repellency and surface characteristics of finished textile were investigated by Fourier transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), transmission electron microscope(TEM), thermogravimetry(TG) and contact angle(CA) analysis. The results showed that fluorine monomer and cross-linked agent were involved in co-polymerization with acrylic monomers, and the particle size of emulsion with obviously core-shell structure was about 76 nm, Moreover，when the fluorine content and the amount of cross-linked agent in core-shell copolymer latexes were 6.7% and 3%, respectively, the water- and oil-repellency of cotton fabric treated with fluorinated latex reached 80 points and level 5, respectively, and contact angle was up to 138.2°. Water- and oil- repellency and thermal stability of the finished textile have been improved with the introduction of siloxane cross-linking agent.