Colored electrophoretic displays

A method of making a functionalized cyan pigment particle, comprising:

• providing a copper phthalocyanine pigment core;
• dispersing the copper phthalocyanine pigment core in an aqueous ammonia solution;
• silanizing the copper phthalocyanine pigment core in the aqueous ammonia solution;
• separating a silanized copper phthalocyanine pigment core;
• dispersing the silanized copper phthalocyanine pigment core in a nonpolar solvent with lauryl methacrylate polymers to make a dispersion;
• providing a radical initiator to the dispersion;
• heating and stirring the dispersion including the radical initiator;
• and
• separating a copper phthalocyanine pigment core coated with lauryl methacrylate from the dispersion.

A method of making a functionalized cyan pigment particle, comprising:

• providing a copper phthalocyanine pigment core;
• providing monomethacrylate-terminated poly(dimethylsiloxane);
• providing methyl methacrylate monomers;
• dispersing the copper phthalocyanine pigment core, monomethacrylate-terminated poly(dimethylsiloxane), and methyl methacrylate monomers in a nonpolar solvent to make a dispersion;
• providing a radical initiator to the dispersion;
• heating and stirring the dispersion including the radical initiator;
• and
• separating a copper phthalocyanine pigment core coated with methacrylate-terminated poly(dimethylsiloxane) from the dispersion.