Polymer-encapsulated nanoparticle systems
AssigneeHewlett-Packard Development Company, L.P.
InventorsDoris Pik-Yiu Chun, Hou T. Ng
Life of this patent
Estimating the term…
Abstract
A method for forming a system including polymer-encapsulated nanoparticles includes forming an inverse mini-emulsion including a continuous phase of a non-aqueous medium and a discontinuous phase of at least: a plurality of nanoparticles having a polar surface, and at least one of i) a polar, water-soluble, or water-miscible monomer, or ii) a polar, water-soluble, or water-miscible pre-polymer. The method further includes initiating polymerization of the at least one of the monomer or the prepolymer to form a polymer coating on each of the plurality of nanoparticles in the non-aqueous medium.
Claims20
A method for forming a system including polymer-encapsulated nanoparticles, the method comprising:
- forming an inverse mini-emulsion including a continuous phase of a non-aqueous medium and a discontinuous phase of at least:
- a plurality of nanoparticles having a polar surface, and at least one of i) a polar, water-soluble, or water-miscible monomer, or ii) a polar, water-soluble, or water-miscible pre-polymer;
- and
- initiating polymerization of the at least one of the monomer or the prepolymer to form a polymer coating on each of the plurality of nanoparticles in the non-aqueous medium.
A method for forming a system including polymer-encapsulated nanoparticles, the method comprising:
- forming an inverse mini-emulsion including a continuous phase of a non-oxidative water immiscible non-aqueous dielectric medium and a discontinuous phase of at least:
- a plurality of solid nanoparticles having a polar surface, and at least one of i) a polar, water-soluble, or water-miscible monomer, or ii) a polar, water-soluble, or water-miscible pre-polymer;
- and
- initiating polymerization of the at least one of the monomer or the prepolymer to form a polymer coating directly on each of the plurality of nanoparticles in situ in the non-aqueous dielectric medium, each polymer-encapsulated particle having a diameter that is less than 1 micron;
- wherein the polymer coating includes an ionic species to promote charging of the polymer coating, the ionic species being an aliphatic acid salt of a chain aliphatic derivative containing one of acids and bases, wherein the chain aliphatic derivative includes at least 5 carbon atoms, and wherein the acids are selected from valeric, hexanoic, heptanoic, caprylic, nonanoic, capric, myristic, palmitic, heptadecanoic, stearic, arachidic, behenic, lignoceri, phosphoric, boronic, sulfonic, sulfamic, nitric, nitrous, nitrosulfuric, and pyrophosphoric acids.
Dependencies are inferred from the claim text.