Unlock instant, AI-driven research and patent intelligence for your innovation.

an al/bi 2 o 3 Preparation method of nano energetic materials

A nano-composite material and nano-technology, used in the production of explosives and bulk chemicals, can solve the problems of easy agglomeration, low energy density of thermite, poor mixing uniformity of aluminum powder and metal oxide, etc., to reduce agglomeration, improve The effect of combustion performance

Active Publication Date: 2021-07-09
SOUTHWEAT UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mixing uniformity of the aluminum powder and the metal oxide in the nano energetic material prepared by the existing method is poor, and it is easy to agglomerate, which makes the energy density of the thermite low.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of Al / Bi 2 O 3 The preparation method of nanometer energetic material is characterized in that, comprises the following steps:

[0022] Step 1. Put 300mg Bi 2 O 3 powder with supercritical CO 2 In the reaction kettle, 10 mL of fluorosilane-modified graphene oxide dispersion and 2.5 mg of polyethylene glycol were added at the same time, stirred evenly, and then added to the supercritical CO. 2 Carbon dioxide was injected into the reaction kettle, and the reaction was stirred at a temperature of 100 ° C and a pressure of 12 MPa for 2 h, pressure relief, cooling, centrifugation, washing, and vacuum drying to obtain Bi 2 O 3 / Fluorosilane-modified graphene oxide nanocomposites; used in supercritical CO 2 The reaction is carried out in the reactor to form supercritical CO 2 The fluid has excellent solubility, which can make the mixing of each reactant more uniform, and the supercritical CO 2 The fluid can be used as a continuous phase, so mass transfer and he...

Embodiment 2

[0027] A kind of Al / Bi 2 O 3 The preparation method of nanometer energetic material is characterized in that, comprises the following steps:

[0028] Step 1. Put 300mg Bi 2 O 3 powder with supercritical CO 2 In the reaction kettle, 5 mL of fluorosilane-modified graphene oxide dispersion and 1.25 mg of polyethylene glycol were added at the same time, stirred evenly, and then added to supercritical CO. 2 Carbon dioxide was injected into the reaction kettle, and the reaction was stirred at a temperature of 120 ° C and a pressure of 15 MPa for 1 h, pressure relief, cooling, centrifugation, washing, and vacuum drying to obtain Bi 2 O 3 / Fluorosilane-modified graphene oxide nanocomposites;

[0029] Step 2, put 120mg Bi 2 O 3 / Fluorosilane-modified graphene oxide nanocomposite and 15mg Al powder were added to 60mL N,N-dimethylformamide, ultrasonically dispersed for 5h, centrifuged, and vacuum-dried. Add ball mill balls to the ball mill tank, pour liquid nitrogen into the b...

Embodiment 3

[0033] A kind of Al / Bi 2 O 3 The preparation method of nanometer energetic material is characterized in that, comprises the following steps:

[0034] Step 1. Put 280mg Bi 2 O 3 powder with supercritical CO 2 In the reaction kettle, 5.6 mL of fluorosilane-modified graphene oxide dispersion and 1.4 mg of polyethylene glycol were added at the same time, stirred evenly, and then added to the supercritical CO. 2 Carbon dioxide was injected into the reaction kettle, and the reaction was stirred at a temperature of 110 ° C and a pressure of 13 MPa for 2 h, pressure relief, cooling, centrifugation, washing, and vacuum drying to obtain Bi 2 O 3 / Fluorosilane-modified graphene oxide nanocomposites;

[0035] Step 2, put 100mg Bi 2 O 3 / Fluorosilane-modified graphene oxide nanocomposite and 20mg Al powder were added to 50mL N,N-dimethylformamide, ultrasonically dispersed for 5h, centrifuged, and vacuum-dried. Add ball mill balls to the ball mill tank, pour liquid nitrogen into ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an Al / Bi 2 o 3 The preparation method of nano energy-containing material, comprising: preparing Bi 2 o 3 / Fluorosilane modified graphene oxide nanocomposites; the Bi 2 o 3 / Fluorosilane-modified graphene oxide nanocomposite material and Al powder are added in N,N-dimethylformamide, ultrasonic, centrifuged, dried, the dried product is added in the ball mill jar, add ball milling balls, to the ball mill jar Into liquid nitrogen, ball milling after constant temperature; collect the ball milling material, namely Bi 2 o 3 / Fluorosilane modified graphene oxide nanocomposites. Preparation of Al / Bi by Adding Fluorosilane Modified Graphene Oxide Dispersion 2 o 3 As a nano energetic material, the hydroxyl and carboxyl groups on the surface of fluorosilane-modified graphene oxide can be combined with nanoparticles to reduce the agglomeration of nanoparticles, make the two phases evenly mixed, and achieve the best phase-interface contact. Graphene can be decomposed at high temperature to produce small molecule fluorocarbons, which can undergo highly exothermic redox reactions with active fuel Al, which can improve the combustion performance of nano-thermites.

Description

technical field [0001] The invention relates to the technical field of energetic materials, in particular to an Al / Bi 2 O 3 Preparation method of nanometer energetic materials. Background technique [0002] Energetic materials, as a kind of reactive materials, in a broad sense refer to a class of substances that can independently carry out rapid chemical reactions and release a large amount of energy under certain external trigger conditions. The energetic materials currently studied mainly include propellants, propellants, explosives and pyrotechnics, and have broad application prospects. Nanocomposite energetic material refers to a composite material composed of a supporting matrix and an organic or inorganic energetic material. In nanocomposite energetic materials, nano-aluminum powder has high specific surface area due to nano-scale particles, which increases the contact area of ​​oxidant and combustible agent, and can obtain energetic materials with high energy densi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C06B33/00C06B33/02
CPCC06B33/00C06B33/02Y02P20/54
Inventor 竹文坤谯志强曾光伟何嵘杨帆白文才
Owner SOUTHWEAT UNIV OF SCI & TECH