Preparation and surface property of core-shell particles containing fluorinated polymer in shell
Purpose ‐ The purpose of this paper is to modify the surface property of polyacrylate latex films using only small amounts of fluorinated acrylate and to optimise the results of such a modification. Design/methodology/approach ‐ The core-shell particles with polyacrylate rich in core and containing fluorinated polymer rich in shell are prepared by a two-stage semi-continuous emulsion polymerisation under kinetically controlled conditions. The surface properties of the latex films produced from the core-shell particles are investigated by optical goniometer measurement as well as contact angle method. Findings ‐ The latex films produced from the core-shell particles exhibited surface energy of around 10?mN/m. The angle resolved X-ray photoelectron spectrum measurements showed an increased average fluorine concentration in a surface layer thickness of a few nanometres, when compared to the fluorine concentration in the bulk. Research limitations/implications ‐ Methyl methacrylate, butyl acrylate and N-methylol acrylamide monomers are used as co-monomer to form the shell with fluoroalkyl methacrylate. By preparing core-shell emulsion with a fluoropolymer in the shell phase, the surface property of polyacrylate latex films is efficiently modified by using only small amounts of fluorinated acrylate monomer. Practical implications ‐ The method developed provided a simple and practical solution to improving the surface property of polyacrylate latex films. Originality/value ‐ The method for enhancing surface property of polyacrylate latex films is novel and can find numerous applications in surface coating.
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