Polyaniline-coated nitro-amine high-energy explosive composite material and preparation method thereof

A technology of high-energy explosives and composite materials, which is applied in the directions of explosives, single substance as explosives, non-explosive/non-thermal agent components, etc., can solve the problems of sparks caused by electrostatic discharge, high electrostatic sensitivity and high resistivity, and reduce the mechanical sensitivity. , good desensitization effect, close combination effect

Inactive Publication Date: 2020-06-23
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of high electrostatic sensitivity has not been resolved
Most energetic materials are highly insulating substances with high resistivity and poor conductivity. It is difficult to dissipate the static charge accumulated in friction and other processes quickly. Energy materials, a series of accidents occurred

Method used

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  • Polyaniline-coated nitro-amine high-energy explosive composite material and preparation method thereof
  • Polyaniline-coated nitro-amine high-energy explosive composite material and preparation method thereof
  • Polyaniline-coated nitro-amine high-energy explosive composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1: Add 0.5g of HMX to aniline HCl solution (30mL, 1M HCl, 10% aniline), and mechanically stir in an ice-water bath at 0-5°C for 30min to disperse the explosive uniformly at 400rpm.

[0055] Step 2: Slowly add the HCl solution of ammonium persulfate (30ml, 1M HCl, 10% ammonium persulfate) dropwise into the mixed solution after dispersion within 30min. Mechanically stirred in an ice-water bath at 0-5°C, and reacted for 4h.

[0056] Step 3: After the reaction, filter with suction, wash with ethanol and deionized water, and dry in a drying oven at 60°C for 12 hours to obtain a HMX@PANI sample.

[0057] According to the national military standard GJB772A-97 method 601.2, the impact sensitivity test is carried out on the sample, and the test conditions are: the weight of the drop hammer is 5kg, and the dose is 35mg. The measured 50% characteristic drop height is 50.1cm, which is 102.02% higher than that of HMX raw material (24.8cm); according to the national military st...

Embodiment 2

[0059] Step 1: Add 0.5g of HMX to aniline HCl solution (30mL, 1M HCl, 10% aniline), and mechanically stir in an ice-water bath at 0-5°C for 30min to disperse the explosive uniformly at 400rpm.

[0060] Step 2: The HCl solution of ammonium persulfate (30 ml, 1M HCl, 10% ammonium persulfate) was slowly added dropwise to the solution obtained in Step 1: within 30 min. Mechanically stirred in an ice-water bath at 0-5°C, and reacted for 6h.

[0061] Step 3: After the reaction, filter with suction, wash with ethanol and deionized water, and dry in a drying oven at 60°C for 12 hours to obtain a HMX@PANI sample.

[0062] According to the test method identical with embodiment 1, record that this sample 50% characteristic drop height is 52.4cm, has improved 111.29% compared with HMX raw material (24.8cm); Explosion percentage is 44%, has reduced compared with HMX raw material (80%) 36%; static electricity accumulation is -4.2μC·kg -1 , compared with HMX raw material (-7.0μC·kg -1 ) w...

Embodiment 3

[0064] Step 1: Add 0.5g of HMX to aniline HCl solution (30mL, 1M HCl, 10% aniline), and mechanically stir in an ice-water bath at 0-5°C for 30min to disperse the explosive uniformly at 400rpm.

[0065] Step 2: The HCl solution of ammonium persulfate (30 ml, 1M HCl, 10% ammonium persulfate) was slowly added dropwise to the solution obtained in Step 1: within 30 min. Mechanical stirring was carried out in an ice-water bath at 0-5°C, and the reaction was carried out for 8h.

[0066] Step 3: After the reaction, filter with suction, wash with ethanol and deionized water, and dry in a drying oven at 60°C for 12 hours to obtain a HMX@PANI sample.

[0067] According to the test method identical with embodiment 1, record that this sample 50% characteristic drop height is 50.2cm, has improved 102.42% compared with HMX raw material (24.8cm); Explosion percentage is 48%, has reduced compared with HMX raw material (80%) 32%; static electricity accumulation is -4.2μC·kg -1 , compared with...

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Abstract

The invention provides a polyaniline coated nitro-amine high-energy explosive composite material. The preparation method sequentially comprises the following steps: step 1, dispersing an explosive: adding a high-energy single-compound explosive into an acidic solution of aniline, and stirring to obtain a uniform explosive dispersion liquid; step 2, reacting and coating: dropwise adding an acid solution of ammonium persulfate, and stirring until white particles in the reaction liquid turns into dark green particles, (the reactions are finished); step 3, carrying out solid-liquid separation, andfiltering the reaction solution to obtain a solid product namely the polyaniline-coated high-energy explosive; and step 4, washing and drying the solid product, filtering, and drying to obtain a loose finished product. Polyaniline not only can play a role in protecting the surface of the nitro-amine high-energy explosive and reduce the mechanical sensitivity, but also can significantly reduce theelectrostatic accumulation amount of the nitro-amine high-energy explosive and ensure the safety during transportation, storage and use. The synthesis method is simple, and the synthesized compositematerial is low in sensitivity and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of energetic composite materials, in particular to a polyaniline-coated nitramine high-energy explosive composite material and a preparation method thereof. Background technique [0002] High-energy elemental explosives (RDX, HMX, CL-20, etc.) have many advantages such as high energy and high detonation velocity, and are widely used in warhead charges and high-energy propellants. However, there are defects of high mechanical sensitivity and high electrostatic sensitivity, which add many serious safety hazards, so it needs to be desensitized. [0003] In terms of reducing the sensitivity of energetic materials, the surface coating effect of polymer materials is remarkable. For example, Chinese patent CN110283030A uses norepinephrine to coat single-substance explosives, which reduces the impact sensitivity and friction sensitivity. However, the problem of high electrostatic sensitivity has not been resolved. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B49/00C08G73/02C06B31/30
CPCC06B23/005C06B23/009C06B31/30C06B49/00C08G73/0266
Inventor 谈玲华应宇杰张利波吕静赵旭阳周智鹏康唐
Owner NANJING UNIV OF SCI & TECH
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