Molecular Crystals and Liquid Crystals, Vol.463, 467-473, 2007
Encapsulation of inorganic pigment and its electromigration phenomenon in dielectric medium
Encapsulation of inorganic pigments can be useful to protect the pigments from the environment or to prevent particular clustering and aggregation, thereby extending the lifetime of the electrophoretic display when the pigments are used as electrophoretic particles. In this study, inorganic pigments were encapsulated by two step polymerization of methyl methacrylate, ethylene glycol dimethylate, and methacrylic acid. Chemical structure, the morphology and the thermal stability of the encapsulated pigments were investigated by FT-IR, optical and electron microscopies and TGA, respectively. Dispersion characteristics and the electrophoretic response of the encapsulated pigments in dielectric medium were investigated. In comparison with the neat pigments, the modified pigments showed much lower densities and their surface was totally changed.