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Method for preparing explosive/aluminum powder core-shell structure spherical compound based on pickering emulsion process

A technology of core-shell structure and compound, which is applied in the field of material compounding, can solve problems such as uniform mixing problems, and achieve the effect of increasing safety performance

Active Publication Date: 2020-11-17
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still a technical problem to realize the uniform mixing of the two

Method used

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  • Method for preparing explosive/aluminum powder core-shell structure spherical compound based on pickering emulsion process
  • Method for preparing explosive/aluminum powder core-shell structure spherical compound based on pickering emulsion process
  • Method for preparing explosive/aluminum powder core-shell structure spherical compound based on pickering emulsion process

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Experimental program
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Effect test

Embodiment 1

[0028] A method for preparing explosives / Al powder core-shell structure spherical composite based on pickering emulsion method, comprising the following steps:

[0029] Step 1: Add 10g of nano-Al powder into 100mL of ethanol, ultrasonically disperse, add 0.1g of polyvinyl alcohol, slowly add 200mL of cyclohexane dropwise while stirring, centrifuge and dry after 30 minutes of reaction to obtain polyvinyl alcohol-modified nano Al powder, the HLB value is 13.8; the speed of dripping cyclohexane is 2mL / min; the power of ultrasonic is 300W, and the frequency is 45kHz; the speed of the stirring is 150r / min;

[0030] Step 2. Dissolve 2g of CL-20 in 10mL of ethyl acetate, then add 0.2g of polyvinyl alcohol-modified nano-Al powder, add 50mL of distilled water after 10 minutes, and emulsify mechanically for 5 minutes to obtain an emulsion; then add 300mL of it dropwise to the system Distilled water, filtered and dried to obtain Al / CL-20 spherical composite; the stirring speed of the mec...

Embodiment 2

[0033] A method for preparing explosives / Al powder core-shell structure spherical composite based on pickering emulsion method, comprising the following steps:

[0034] Step 1. Add 10g of nano-Al powder to 120mL of ethanol, ultrasonically disperse, add 0.1g of polyvinyl alcohol, slowly add 200mL of cyclohexane dropwise while stirring, centrifuge and dry after 30 minutes of reaction to obtain polyvinyl alcohol-modified nano Al powder; the HLB value is 13.6; the speed of dripping cyclohexane is 5mL / min; the power of ultrasonic is 300W, and the frequency is 60kHz; the speed of stirring is 300r / min;

[0035] Step 2. Dissolve 2g of CL-20 in 10mL of ethyl acetate, then add 0.3g of polyvinyl alcohol-modified nano-Al powder, add 50mL of distilled water after 10 minutes, and mechanically emulsify for 5 minutes to obtain an emulsion; then add 300mL of it dropwise to the system Distilled water, filtered and dried to obtain Al / CL-20 spherical composite; the stirring speed of the mechanica...

Embodiment 3

[0038] A method for preparing explosives / Al powder core-shell structure spherical composite based on pickering emulsion method, comprising the following steps:

[0039] Step 1. Add 10g of nano-Al powder to 120mL of ethanol, ultrasonically disperse, add 0.1g of polyvinyl alcohol, slowly add 200mL of cyclohexane dropwise while stirring, centrifuge and dry after 30 minutes of reaction to obtain polyvinyl alcohol-modified nano Al powder, the HLB value is 13.7; the speed of dripping cyclohexane is 5mL / min; the power of ultrasonic is 300W, and the frequency is 60kHz; the speed of the stirring is 300r / min;

[0040] Step 2. Dissolve 2 g of CL-20 and 2,4,6-trinitrotoluene with a mass ratio of 1:1 in 10 mL of ethyl acetate, then add 0.3 g of polyvinyl alcohol-modified nano-Al powder, and after 10 min Add 50mL of distilled water and perform mechanical emulsification for 5 minutes to obtain an emulsion; then add 300mL of distilled water dropwise to the system, filter and dry to obtain an ...

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Abstract

The invention discloses a method for preparing an explosive / Al powder core-shell structure spherical compound based on a pickering emulsion process. The method comprises the following steps: carryingout interface modification or modification on nanometer Al powder, and regulating the HLB value of the nanometer Al powder to obtain modified nanometer Al powder; and adding a single-ingredient explosive into a solvent A, dissolving the single-ingredient explosive, adding the modified nanometer Al powder, carrying out stirring, adding a non-solvent B, carrying out ultrasonic or mechanical emulsification to form an emulsion, adding a non-solvent C or conducting heating to crystallize the explosive so as to obtain a solid-liquid mixture, and successively carrying out filtering, washing and drying to obtain the explosive / Al powder core-shell structure spherical compound. Accordign to the invention, the surface of the nanometer aluminum powder is modified and coated, so the sensitivity of thenanometer aluminum powder can be reduced, the nanometer aluminum powder can be effectively prevented from being continuously oxidized, the HLB value of the nanometer aluminum powder can be changed, and the nanometer aluminum powder can be used as a surfactant of a pickering emulsion; and finally, the Al / explosive spherical compound with a shell-core structure is obtained.

Description

technical field [0001] The invention belongs to material compounding technology, in particular to a method for preparing explosive / aluminum powder core-shell structure spherical compound based on a pickering emulsion method. Background technique [0002] Modern national defense and weapon systems put forward higher requirements on the energy output of energetic materials, and one of the effective ways to increase the energy of weapon systems is to add high-energy components to the formula, among which high-energy explosives and metal aluminum powder are relatively Ideal additive. Metal Al powder has high calorific value and density, which can effectively increase energy in explosives and propellant formulations, and is currently the most widely used metal additive. [0003] In order to improve the energy of solid propellants, magnesium, aluminum, boron and other metals are often used as high-energy additives, which can increase the mass specific impulse and volume specific ...

Claims

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Application Information

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IPC IPC(8): C06B21/00C06B45/22C06B33/08C06D5/06
CPCC06B21/0083C06B33/08C06B45/22C06D5/06
Inventor 郭长平李玥其叶平翟恒段晓慧田璐
Owner SOUTHWEAT UNIV OF SCI & TECH
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