Preceramic Polymer Grafted Nanoparticles and Methods of Making and Using Same
AssigneeGovernment of the United States as Represented by the Secretary of the Air Force
InventorsMatthew B. Dickerson, Kara L. Martin
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Abstract
The present invention relates to preceramic polymer grafted nanoparticles and as well as methods of making and using same. Advantages of such preceramic polymer grafted nanoparticles include, reduced out gassing, desired morphology control and desirable, distinct rheological properties that are not found in simple mixtures. As a result, Applicants' preceramic polymer grafted nanoparticles can be used to provide significantly improved, items including but not limited to hypersonic vehicles, jets, rockets, mirrors, signal apertures, furnaces, glow plugs, brakes, and armor.
Claims20
A preceramic polymer grafted nanoparticle comprising a core having an outer surface and maximum dimension in any single direction of 5 microns, and a plurality of polymers covalently bound to the outer surface of said core:
- a) said core comprising a material selected from the group consisting of Hydrogen, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Cesium, Barium, Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, and mixtures thereof, and
- b) said plurality of polymers comprising a polycarbosilane and said plurality of polymers having an average brush length of from about 1 nanometer to about 100 nanometers.
A process of making a preceramic polymer grafted nanoparticle comprising:
- combining a carbosilane monomer comprising at least one silane moiety and at least one vinyl moiety and/or a cyclic carbosilane monomer, with a core comprising a material selected from the group consisting of Hydrogen, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Cesium, Barium, Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, and mixtures thereof, said core having an outer surface, said outer surface being functionalized.
A process of making a preceramic polymer grafted nanoparticle according to claim wherein said core comprises a nonoxide ceramic and said catalyst is platinum and/or a carbanion.
Dependencies are inferred from the claim text.