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US 8,710,146 B2Granted
Particles with high surface charge for crystalline colloidal arrays
AssigneePPG Industries Ohio, Inc.
InventorsXiangling Xu, Sean Purdy
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Abstract
A method of preparing a dispersion of polymeric particles is disclosed. Monomers are emulsion polymerized in the presence of an ionic monomer to produce highly charged polymeric particles. At least 50% of the ionic monomer in the dispersion is bound to the polymeric particles.
Claims14
A method of preparing an ordered periodic array of particles comprising:
- dispersing monomers in an emulsion containing an ionic monomer, wherein the monomer has a solubility in water that is less than the water solubility of 3-allyloxy-2-hydroxyl-1-propanesulfonic acid (COPS I);
- polymerizing the dispersed monomers to produce monodispersed polymeric particles wherein at least 50% of the ionic monomer in the dispersion is bound to the polymeric particles;
- applying the dispersion onto a substrate, whereby the particles self-align into an ordered periodic array;
- and
- drying the array so that the array is non-gelatinous and substantially solid.
2 more elements
Dependencies are inferred from the claim text.