IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0422488
(2003-04-24)
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발명자
/ 주소 |
- Tillotson,Thomas M.
- Simpson,Randall L.
- Hrubesh,Lawrence W.
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출원인 / 주소 |
- The Regents of the University of California
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인용정보 |
피인용 횟수 :
7 인용 특허 :
12 |
초록
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A method of preparing energetic metal-oxide-based energetic materials using sol-gel chemistry has been invented. The wet chemical sol-gel processing provides an improvement in both safety and performance. Essentially, a metal-oxide oxidizer skeletal structure is prepared from hydrolyzable metals (m
A method of preparing energetic metal-oxide-based energetic materials using sol-gel chemistry has been invented. The wet chemical sol-gel processing provides an improvement in both safety and performance. Essentially, a metal-oxide oxidizer skeletal structure is prepared from hydrolyzable metals (metal salts or metal alkoxides) with fuel added to the sol prior to gelation or synthesized within the porosity metal-oxide gel matrix. With metal salt precursors a proton scavenger is used to destabilize the sol and induce gelation. With metal alkoxide precursors standard well-known sol-gel hydrolysis and condensation reactions are used. Drying is done by standard sol-gel practices, either by a slow evaporation of the liquid residing within the pores to produce a high density solid nanocomposite, or by supercritical extraction to produce a lower density, high porous nanocomposite. Other ingredients may be added to this basic nanostructure to change physical and chemical properties, which include organic constituents for binders or gas generators during reactions, burn rate modifiers, or spectral emitters.
대표청구항
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What is claimed is: 1. A method comprising: dissolving a metal salt or metal alkoxide in a solvent to form a metal salt solution or a metal alkoxide solution; adding a proton scavenger to the solution if the solution is a metal salt solution to induce the formation of a gel; adding water and a cata
What is claimed is: 1. A method comprising: dissolving a metal salt or metal alkoxide in a solvent to form a metal salt solution or a metal alkoxide solution; adding a proton scavenger to the solution if the solution is a metal salt solution to induce the formation of a gel; adding water and a catalyst to the solution, if the solution is a metal alkoxide solution to induce the formation of a gel; adding a fuel to the metal salt or metal alkoxide solution; allowing a gel to form; and drying said gel to produce an energetic nanocomposite. 2. The method recited in claim 1, wherein the fuel is a powdered fuel. 3. The method recited in claim 1, wherein the drying is accomplished by slow evaporation of the liquid. 4. The method recited in claim 1, wherein the drying is accomplished by supercritical extraction. 5. The method recited in claim 1, further comprising adding organic constituents. 6. The method recited in claim 1, wherein the proton scavenger is selected from the group consisting of butadiene monoxide, cyclohexene oxide, cis-2,3-epoybutane, propylene oxide, 1,2-epolybutane, 1,2-epoxypentane, 2,3-epoxy(propyl)benzene, glycidol, epichlorohydrin, epifluorohydrin, epibromohydrin and trimehtylene oxide. 7. The method recited in claim 1, wherein the solvent is selected from the group consisting of water, methanol, ethanol, 1-propanol, t-butanol, dimethylformamide, acetone, ethylene glycol, propylene glycol, and benzyl alcohol. 8. The method recited in claim 1, wherein the metal portion of the metal salt or metal alkoxide is selected from the following elements of the periodic table: Groups 2 through 13, germanium, tin, lead, antimony, bismuth, polonium, the lanthanides and the actinides.
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