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HMX (octogen) surface coating sensitivity decreasing method

A surface coating and desensitization technology, applied in non-explosive/non-thermal agent components, non-explosive desensitizers/passivators, nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve the cost High, cumbersome coating process, not environmentally friendly, etc., to achieve the effect of reduced mechanical sensitivity and simple post-processing

Inactive Publication Date: 2018-07-27
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing HMX coating materials mainly include paraffin, polymer materials (polyurethane, fluororubber, polyacrylate), insensitive explosives (TATB, NTO), etc. The existing coating methods have relatively cumbersome coating process, and the coating The process requires the use of various organic reagents, which are costly and not environmentally friendly
In addition, the existing coating materials and processes are difficult to ensure the formation of a uniform and complete desensitization coating on the surface of HMX particles

Method used

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  • HMX (octogen) surface coating sensitivity decreasing method
  • HMX (octogen) surface coating sensitivity decreasing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Take by weighing 0.1g tannic acid solid, dissolve in 2.5ml water, prepare the tannic acid aqueous solution that concentration is 40mg / ml;

[0019] (2) Take by weighing 0.025g ferric chloride solid, be dissolved in 2.5ml water, the preparation concentration is the ferric chloride aqueous solution of 10mg / ml;

[0020] (3) Add 1g of HMX particles into the tannic acid aqueous solution and stir rapidly, the stirring rate is 500r / min, and the stirring time is 100s, then add the ferric chloride aqueous solution, and continue stirring for 100s;

[0021] (4) dripping concentration gradually is the sodium hydroxide aqueous solution of 0.1mol / L, and the pH value of the mixed solution described in (3) is adjusted to be 8;

[0022] (5) Washing with water, filtering, separating and drying the HMX particles at a drying temperature of 50° C. to obtain HMX particles coated with desensitization on the surface. The characteristic drop height of HMX has been increased from 32.0cm to 5...

Embodiment 2

[0024] (1) Take by weighing 0.4g tannic acid solid, be dissolved in 20ml water, the preparation concentration is the tannic acid aqueous solution of 20mg / ml;

[0025] (2) Take by weighing 0.1g ferric chloride solid, be dissolved in 20ml water, prepare the ferric chloride aqueous solution that concentration is 5mg / ml;

[0026] (3) Add 0.5g of HMX particles into the ferric chloride aqueous solution and stir rapidly, the stirring rate is 400r / min, and the stirring time is 10s, then add the tannic acid aqueous solution, and continue stirring for 10s;

[0027] (4) Gradually drip the tris aqueous solution whose concentration is 0.5mol / L, and adjust the pH value of the mixed solution described in (3) to be 8.5;

[0028] (5) Washing with water, filtering, separating and drying the HMX particles at a drying temperature of 70° C. to obtain HMX particles coated with desensitization on the surface.

Embodiment 3

[0030] (1) Take by weighing 0.2g tannic acid solid, dissolve in 20ml water, prepare the tannic acid aqueous solution that concentration is 10mg / ml;

[0031] (2) Take by weighing 0.1g ferric chloride solid, be dissolved in 20ml water, prepare the ferric chloride aqueous solution that concentration is 5mg / ml;

[0032] (3) Add 20g of HMX particles into the ferric chloride aqueous solution and stir rapidly, the stirring rate is 800r / min, the stirring time is 200s, then add the tannic acid aqueous solution, and continue stirring for 200s;

[0033] (4) dripping the ammonia solution whose concentration is 0.5mol / L step by step, adjust the pH value of the mixed solution described in (3) to be 9;

[0034] (5) Washing with water, filtering, separating and drying the HMX particles at a drying temperature of 60° C. to obtain HMX particles coated with desensitization on the surface.

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Abstract

The invention discloses an HMX surface coating sensitivity decreasing method. The HMX surface coating sensitivity decreasing method comprises (1) preparing a polyphenol phenolic compound aqueous solution; (2) preparing a ferric chloride aqueous solution; (3) performing coating treatment, specifically, weighing out and rapidly stirring HMX particles into the polyphenol phenolic compound aqueous solution of the step (1), then adding in the ferric chloride aqueous solution, and continuing to stirring the mixture, or, rapidly stirring the HMX particles into the ferric chloride aqueous solution, then adding in the polyphenol phenolic compound aqueous solution and continuing to stir the mixture; (4) regulating the pH of the mixture; (5) performing separating treatment, specifically, water-washing, filtering, separating out and drying the HMX particles to obtain surface coating sensitivity-decreased HMX particles. The HMX surface coating sensitivity decreasing method is characterized by processing HMX, which is high in mechanical sensitivity. By means of the HMX surface coating sensitivity decreasing method, the surface-coated HMX can significantly reduce the mechanical sensitivity.

Description

technical field [0001] The invention relates to the field of energetic materials, in particular to a simple surface coating method for reducing the mechanical sensitivity of HMX. Background technique [0002] The development and application of insensitive explosives is a necessary condition for improving the safety of weapons and ammunition itself, and reducing the sensitivity of high-energy single-substance explosives is a key technology for realizing high-energy insensitive explosives. HMX (Octojin) has many advantages such as high density, high detonation velocity and good heat resistance, so it is widely used in explosive charges, solid propellants and propellants. However, due to its high mechanical sensitivity, its application is limited, so HMX needs to be desensitized. Among the existing desensitization methods for explosives, surface coating has attracted the attention of researchers at home and abroad as a method with a relatively simple process, a wide range of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34C06B23/00
CPCC06B23/005C06B25/34
Inventor 谢虓祝青柴志宇肖春郑保辉
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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