Fluorinated polystyrene-acrylate (PSA) latex nanoparticles with coreshell structure were synthesised by two-stage seeded emulsion polymerisation method in the presence of reactive emulsifier DNS-86. Diallyl phthalate (DAP) and Vinyltriethoxysilicone (VTES) were used as crosslinking agent to immobilise the fluorinated copolymer on the surface of the latex film. Fourier transform infrared spectroscopy (FTIR) spectra show that fluorine and siloxane monomers were effectively involved in the emulsion copolymerisation. Transmission electron microscope (TEM) observation shows that the prepared emulsion particles had a coreshell structure with fluorinated copolymer in the shell. X-ray photoelectron spectroscopy (XPS) analysis reveals that fluorine atom has the tendency of migrating to the filmair interface and the incorporation of VTES helps the migration of fluorine atom towards the filmair interface. Water contact angle (WCA) test proved that DAP and VTES as crosslinking agent can immobilise the fluorinated copolymer on the surface of the latex films. (c) 2011 Canadian Society for Chemical Engineering