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Direct-writing preparation method of hollow carbon nanosphere/Al/Fe2O3-based nano thermite

A nanosphere and hollow carbon technology, applied in nanocarbon, nanotechnology, nanotechnology and other directions, can solve the problems of heat absorption and poor heat transfer performance, and achieve the effect of simple operation and good universality.

Pending Publication Date: 2021-12-10
SOUTHWEAT UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat absorption and poor heat transfer performance of the samples prepared by the direct writing method become the main factors restricting the reaction propagation and release rate.

Method used

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  • Direct-writing preparation method of hollow carbon nanosphere/Al/Fe2O3-based nano thermite
  • Direct-writing preparation method of hollow carbon nanosphere/Al/Fe2O3-based nano thermite
  • Direct-writing preparation method of hollow carbon nanosphere/Al/Fe2O3-based nano thermite

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of hollow carbon nanosphere / Al / Fe 2 o 3 The direct writing preparation method of nano-based thermite comprises the following steps:

[0032] Step 1, with 0.32gAl and 1.6gFe 2 o 3 Add 50mL of n-hexane, stir, and sonicate to obtain a uniform suspension, and vacuum-dry the suspension to obtain a dry powder mixture; the ultrasonic power is 35kHz, and the power is 300W;

[0033] Step 2, mix the dry powder mixture with 1.6g of nitrocellulose solution (14wt%), and grind to obtain a slurry; the grinding adopts a stirring grinder, the grinding temperature is 10°C, the grinding time is 120min, and the grinding speed is 1200r / min ;

[0034] Step 3. Pass the slurry through a 0.5mm nozzle ink direct writing printing and then vacuum drying to obtain hollow carbon nanospheres / Al / Fe 2 o 3 Nano-based thermite (HCS-0).

Embodiment 2

[0036] A kind of hollow carbon nanosphere / Al / Fe 2 o 3 The direct writing preparation method of nano-based thermite comprises the following steps:

[0037] Step 1, 0.016g hollow carbon nanospheres, 0.32gAl and 1.6gFe 2 o 3 Add in 50mL of n-hexane, stir, and ultrasonically obtain a uniform suspension, and vacuum-dry the suspension to obtain a dry powder mixture; the ultrasonic power is 35kHz, and the power is 300W; the preparation method of the hollow carbon nanospheres is as follows: 35mmol NaN 3 And the mixture of 1.6g fluorinated graphite is added to the autoclave, and then the mixture is heated, under N 2 Under the atmosphere, the temperature was raised to 320°C and kept at this temperature until the pressure and temperature deflagration reaction occurred due to heat release, cooled naturally, and the product was collected, washed 3 times with distilled water, and vacuum-dried at 60°C for 24 hours to obtain hollow carbon nanospheres;

[0038] Step 2, mix the dry powder ...

Embodiment 3

[0041] A kind of hollow carbon nanosphere / Al / Fe 2 o 3 The direct writing preparation method of nano-based thermite comprises the following steps:

[0042] Step 1, 0.032g hollow carbon nanospheres, 0.32gAl and 1.6gFe 2 o 3Add in 50mL of n-hexane, stir, and ultrasonically obtain a uniform suspension, and vacuum-dry the suspension to obtain a dry powder mixture; the ultrasonic power is 35kHz, and the power is 300W; the preparation method of the hollow carbon nanospheres is: 35mmol NaN 3 And the mixture of 1.6g fluorinated graphite is added to the autoclave, and then the mixture is heated, under N 2 Under the atmosphere, the temperature was raised to 320°C and kept at this temperature until the pressure and temperature deflagration reaction occurred due to heat release, cooled naturally, the product was collected, washed 3 times with distilled water, and vacuum dried at 60°C for 24 hours to obtain hollow carbon nanospheres;

[0043] Step 2, mix the dry powder mixture with 1.6...

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Abstract

The invention discloses a direct-writing preparation method of a hollow carbon nanosphere / Al / Fe2O3-based nano thermite, which comprises the following steps that first, the hollow carbon nanospheres and Al / Fe2O3 nano thermite are added into an organic solvent, stirring and ultrasonic treatment are carried out to obtain a uniform suspension, and vacuum drying is conducted on the suspension to obtain a dry powder mixture; second, the dry powder mixture is mixed with a nitrocellulose solution, and grinding is conducted to obtain slurry; and third, the slurry is subjected to ink direct writing printing and then subjected to vacuum drying to obtain a thermite structure with the controllable size and shape. According to the preparation method, the hollow carbon nanospheres and the Al / Fe2O3 nano thermit solid particles are safely and controllably mixed together in an ink direct writing manner. The preparation of the novel thermite structure with controllable size and shape is realized by adopting printing ink nozzles with different diameters. The method is safe, controllable and easy to operate, has good universality, can be used for preparing other advanced materials, and provides a new thought for material design in the future.

Description

technical field [0001] The invention belongs to the field of energetic materials, in particular to a controllable and safe preparation of hollow carbon nanospheres / Al / Fe by ink direct writing method 2 o 3 A Direct Writing Method Based on Nano-Thermites. Background technique [0002] As we all know, nanothermal agents composed of nanofuels (Al) and oxidants have attracted increasing attention due to their high energy density and heat release rate. Although a large number of thermites with different nanostructures have been prepared in recent years, the difficulties in their design, customization, and fabrication still severely limit their applications in military and civilian applications. “3D printing” technology is known to use additive manufacturing techniques to create geometrically complex functional structures. Therefore, the direct writing method, as a mature 3D printing technology, was introduced into the preparation process to meet the preparation of complex micro...

Claims

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Application Information

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IPC IPC(8): B22F10/10B22F10/64B22F1/00B33Y10/00B33Y40/10B33Y70/10B33Y80/00B82Y30/00B82Y40/00C01B32/15
CPCB22F10/10B22F10/64B33Y10/00B33Y40/10B33Y70/10B33Y80/00B82Y30/00B82Y40/00C01B32/15Y02P10/25
Inventor 竹文坤杨光成谯志强杨海峰师鹏翔刘有松徐传豪
Owner SOUTHWEAT UNIV OF SCI & TECH
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