Abstract
Micro- and nanospheres with superamphiphobic surfaces were prepared by a simple method that employed the conventional dispersion polymerization of perfluoroalkyl methacrylates in methanol. The polymerizations of 2,2,2-trifluoroethyl methacrylate (TFMA) produced microspheres with an average 4.12-μm diameter, while that of 2-(perfluorooctyl)ethyl methacrylate (POMA) provided nanospheres with a 679-nm diameter. An X-ray photoelectron spectroscopy analysis revealed that the fluorine atoms were highly concentrated on the top of the sphere surfaces. It was found that the surface coated with the spheres had a superamphiphobicity. The water contact angles were 150° for the PTFMA microspheres and 173° for the PPOMA nanospheres, while the diiodomethane contact angles were 159° for the microspheres and 160° for the nanospheres. The synergistic effect of the spherical structure and the high concentration of fluorine on the top of the surface produced the superamphiphobicity.
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