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Preparation method of high-reactivity nano aluminum/copper oxide microspheres

A high-reactivity, nano-aluminum technology, applied in the direction of copper oxide/copper hydroxide, nanotechnology, metal processing equipment, etc., can solve the problem of less research on micro-nano composite energetic materials, and can not effectively improve the easy oxidation of nano-aluminum and the inability to form Problems such as core-shell structure achieve the effect of shortening the mass transfer distance, high sphericity, and not easy to agglomerate

Inactive Publication Date: 2021-04-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The CuO / Al nano-thermite prepared by this method has the advantages of tight contact between components, high purity, adjustable size, and excellent combustion performance, but it cannot form the core-shell structure of Al@CuO, and cannot effectively improve the problem of easy oxidation of nano-aluminum. (Wang, Haiyang, et al."Assembly and reactive properties ofAl / CuO based nanothermite microparticles."Combustion and Flame 161.8(2014):2203-2208.)
[0004] At present, the relevant reports on coaxial electrospray mainly focus on encapsulating biomacromolecules and hydrophobic small molecule drugs, such as deoxynucleotides, proteins, budesonide, etc., while the research on micro-nano composite energetic materials is relatively scarce. few

Method used

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  • Preparation method of high-reactivity nano aluminum/copper oxide microspheres
  • Preparation method of high-reactivity nano aluminum/copper oxide microspheres
  • Preparation method of high-reactivity nano aluminum/copper oxide microspheres

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Weigh 200mg of nano-aluminum powder, 600mg of copper oxide, and 6mg and 18mg of nitrocellulose at room temperature, measure 2mL and 3mL of solvent acetone, and place the weighed nitrocellulose into a good amount of acetone at 25°C, and stir magnetically The speed is 500rpm, so that the nitrocellulose is completely dissolved, the weighed nano aluminum powder and copper oxide are put into the nitrocellulose solution, ultrasonicated at an ultrasonic frequency of 50kHZ for one hour, and then magnetically stirred for 24 hours before use. Quickly put the obtained aluminum powder solution into a 10mL plastic syringe, quickly put the copper oxide solution into a 5mL syringe, and replace the 10mL plastic syringe with a 21G flat apex metal coaxial needle, and at the same time, put the copper oxide solution into the outer tube, and then Install the syringe on the propulsion pump in the electrostatic spray device with an ambient temperature of 25°C, set the flow rate of the inner tu...

Embodiment 2

[0031]Weigh 200mg of nano-aluminum powder, 600mg of copper oxide and 12mg and 36mg of nitrocellulose at room temperature, measure 2mL and 3mL of solvent acetone, put the weighed nitrocellulose into a good amount of acetone at 25°C, and stir magnetically The speed is 500rpm, so that the nitrocellulose is completely dissolved, the weighed nano aluminum powder and copper oxide are put into the nitrocellulose solution, ultrasonicated at an ultrasonic frequency of 50kHZ for one hour, and then magnetically stirred for 24 hours before use. Quickly put the obtained aluminum powder solution into a 10mL plastic syringe, quickly put the copper oxide solution into a 5mL syringe, and replace the 10mL plastic syringe with a 21G flat apex metal coaxial needle, and at the same time, put the copper oxide solution into the outer tube, and then Install the syringe on the propulsion pump in the electrostatic spray device with an ambient temperature of 25°C, set the flow rate of the inner tube prop...

Embodiment 3

[0033] Weigh 200mg of nano-aluminum powder, 800mg of copper oxide and 12mg and 36mg of nitrocellulose at room temperature, measure 2mL and 3mL of solvent acetone, put the weighed nitrocellulose into a good amount of acetone at 25°C, and stir magnetically The speed is 500rpm, so that the nitrocellulose is completely dissolved, the weighed nano aluminum powder and copper oxide are put into the nitrocellulose solution, ultrasonicated at an ultrasonic frequency of 50kHZ for one hour, and then magnetically stirred for 24 hours before use. Quickly put the obtained aluminum powder solution into a 10mL plastic syringe, quickly put the copper oxide solution into a 5mL syringe, and replace the 10mL plastic syringe with a 21G flat apex metal coaxial needle, and at the same time, put the copper oxide solution into the outer tube, and then Install the syringe on the propulsion pump in the electrostatic spray device with an ambient temperature of 25°C, set the flow rate of the inner tube pro...

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Abstract

The invention discloses a preparation method of high-reactivity nano aluminum / copper oxide microspheres. The preparation method comprises the following steps of adding an adhesive into a benign organic solvent, carrying out magnetic stirring at room temperature to fully dissolve the adhesive, adding weighed nano Al and nano CuO, carrying out magnetic stirring and ultrasonic treatment, finally stirring the ultrasonically treated solution, and obtaining an Al precursor solution and a CuO precursor solution; injecting the two prepared precursor solutions into a disposable injector, introducing the Al precursor solution into an inner tube, and introducing the CuO precursor solution into an outer tube; and scraping off composite particles on collecting plate aluminum foil, and drying the composite particles in a freeze dryer to obtain nano Al / CuO composite particles. The nano CuO particles prepared by the method are dispersed and wrapped in the microspheres, so that the technical problems that in a traditional method after nano aluminum powder is wrapped, the energy density is low and the metal aluminum powder is easy to oxidize are solved.

Description

technical field [0001] The invention relates to a method for preparing highly reactive nano-aluminum / copper oxide microspheres, in particular to the field of preparing nano-Al / CuO microspheres. Background technique [0002] Metastable intermolecular complexes (MICs) are nanoscale metal-based reactive materials composed of nanoscale fuels and oxidants, and can also be called nanothermites. Metastable intermolecular complexes have the advantages of high volume energy density, high reaction temperature, fast energy release rate, high reaction heat value, low ignition initiation energy, and easy preparation, etc., which can be controlled by adjusting components, equivalent ratio, and particle size And change the combustion performance of nano thermite. Nano thermite is widely used in civil and military fields due to its excellent heat release and combustion characteristics. Due to the good compatibility between the preparation process of nano-thermite and the preparation proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02C01G3/02B82Y40/00
CPCC01G3/02B82Y40/00C01P2004/80C01P2004/03C01P2002/85C01P2002/88B22F1/07B22F1/16
Inventor 郭效德史凯文周翔
Owner NANJING UNIV OF SCI & TECH
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