Electrophoretic deposition (EPD) is one of the most important coating methods. This method has various advantages, such as coating to form a uniform film even on complex surface. Recently, our lab found that non-ionic poly(ester-sulfone) shows the anode selective electrophoretic behavior. Now, we are doing research on non-ionic EPD. In this work, we tried electrophoresis of non-ionic particles in order to induce structural color. First, we synthesized methacrylate containing pendent sulfide monomer [2-(ethylthio)ethyl methacrylate (ETEMA)], starting from methacryloyl chloride and 2-(ethylthio)ethanol. Next, emulsion polymerization of the sulfide-containing methacrylate was carried out. This polymerization is performed by activators generated by electron transfer atom transfer radical polymerization (AGET ATRP). AGET ATRP is one of the most controlled living radical polymerizations. But, we couldn’t control of particle size as well as molecular weight distribution. Finally, we tried to control of particle size by emulsion copolymerization of styrene and ETEMA. After oxidation to sulfonyl group, coating on metal surface was performed by EPD procedure. After EPD, structural color was apparently observed on the substrate. We observed the surface using scanning electron microscope (SEM) and ultraviolet–visible spectroscopy. The results indicated that the monodisperse sphere mounted on the surface and showed a specific light diffraction.

Electrophoretic non-ionic nano-spheres (latexes) for structural coloring

254th National Meeting (2017)

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