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US 7,125,476 B2Granted
Microwave-attenuating composite materials, methods for preparing the same, intermediates for preparing the same, devices containing the same, methods of preparing such a device, and methods of attenuating microwaves
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsPaul E. Schoen, Ronald R. Price, Joel M. Schnur, Daniel Zabetakis, Robert F. Brady, Jr., Ann Mera, Dana Leamann, Bor-Sen Chiou, Walter J. Dressick
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Abstract
The present invention provides microwave attenuating, filled composite materials which contain a polymer or ceramic matrix and metallic tubules and processes for making the same and devices which contain such materials.
Claims54
A composite material, which comprises:
- (a) a polymer matrix comprising an elastomeric polymer;
- and
- (b) a plurality of metal microtubules dispersed within said polymer matrix, wherein said metal microtubules are one or more microtubules selected from the group consisting of nickel-coated lipid tubules, cobalt-coated lipid tubules, iron-coated lipid tubules, cobalt over copper-coated lipid tubules, iron-alloy coated lipid tubules, nickel-alloy coated lipid tubules, and boron-alloy coated lipid tubules,
- wherein said plurality of metal microtubules further comprises one or more metal microtubules selected from the group consisting of copper-coated halloysite tubules, nickel-coated halloysite tubules, cobalt-coated halloysite tubules, iron-coated halloysite tubules, nickel over copper-coated halloysite tubules, cobalt over copper-coated halloysite tubules, iron-alloy coated halloysite tubules, nickel-alloy coated halloysite tubules, and boron-alloy coated halloysite tubules.
1 more element
A method for preparing a composite material, comprising:
- (1) incorporating a plurality of metal microtubules in a polymer or ceramic matrix;
- (2) mixing a liquid base component with said metal microtubles, to obtain a first mixture;
- (3) adding a curing agent to said first mixture, to obtain a second mixture;
- and
- (4) loading said second mixture into a mold,
- wherein said curing agent is selected from the group consisting of diisocyanate prepolymer containing a plasticizer, a polyoxypropylenediamine, and a copolymer of methylhydrosilane and dimethylsiloxane.
3 more elements
A composition, which comprises:
- (a) an polymer matrix precursor comprising a liquid base component and a liquid curing agent;
- and
- (b) a plurality of metal microtubules dispersed within said polymer matrix precursor.
A composite material, which comprises:
- (a) a polymer matrix;
- and
- (b) a plurality of metal microtubules dispersed within said polymer matrix, wherein said metal microtubules are one or more microtubules selected from the group consisting of nickel-coated lipid tubules, cobalt-coated lipid tubules, iron-coated lipid tubules, cobalt over copper-coated lipid tubules, iron-alloy coated lipid tubules, nickel-alloy coated lipid tubules, and boron-alloy coated lipid tubules,
- wherein said plurality of metal microtubules further comprises one or more metal microtubules selected from the group consisting of copper-coated halloysite tubules, nickel-coated halloysite tubules, cobalt-coated halloysite tubules, iron-coated halloysite tubules, nickel over copper-coated halloysite tubules, cobalt over copper-coated halloysite tubules, iron-alloy coated halloysite tubules, nickel-alloy coated halloysite tubules, and boron-alloy coated halloysite tubules.
1 more element
A composite material, which comprises:
- (a) a polymer matrix;
- and
- (b) a plurality of metal microtubules dispersed within said polymer matrix, wherein said metal microtubules are one or more microtubules selected from the group consisting of copper-coated halloysite tubules, nickel-coated halloysite tubules, cobalt-coated halloysite tubules, iron-coated halloysite tubules, nickel over copper-coated halloysite tubules, cobalt over copper-coated halloysite tubules, iron-alloy coated halloysite tubules, nickel-alloy coated halloysite tubules, and boron-alloy coated halloysite tubules.
A composite material, which comprises:
- (a) a ceramic matrix;
- and
- (b) a plurality of metal microtubules dispersed within said ceramic matrix, wherein said metal microtubules are one or more microtubules selected from the group consisting of copper-coated lipid tubules, nickel-coated lipid tubules, cobalt-coated lipid tubules, iron-coated lipid tubules, nickel over copper-coated lipid tubules, cobalt over copper-coated lipid tubules, iron-alloy coated lipid tubules, nickel-alloy coated lipid tubules, and boron-alloy coated lipid tubules,
- wherein said plurality of metal microtubules further comprises one or more metal microtubules selected from the group consisting of copper-coated halloysite tubules, nickel-coated halloysite tubules, cobalt-coated halloysite tubules, iron-coated halloysite tubules, nickel over copper-coated halloysite tubules, cobalt over copper-coated halloysite tubules, iron-alloy coated halloysite tubules, nickel-alloy coated halloysite tubules, and boron-alloy coated halloysite tubules.
1 more element
A composite material, which comprises:
- (a) a ceramic matrix;
- and
- (b) a plurality of metal microtubules dispersed within said ceramic matrix, wherein said metal microtubules are one or more microtubules selected from the group consisting of copper-coated halloysite tubules, nickel-coated halloysite tubules, cobalt-coated halloysite tubules, iron-coated halloysite tubules, nickel over copper-coated halloysite tubules, cobalt over copper-coated halloysite tubules, iron-alloy coated halloysite tubules, nickel-alloy coated halloysite tubules, and boron-alloy coated halloysite tubules.
Dependencies are inferred from the claim text.