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Preparation method for reducing mechanical sensitivity of HMX

A technology of mechanical sensitivity and concentration, applied in the direction of nitrated acyclic/alicyclic/heterocyclic amine explosive compositions, etc., can solve the problems of poor environmental adaptability of materials, and achieve good uniformity and integrity, reduced friction sensitivity, and poor characteristics. high boosting effect

Active Publication Date: 2016-07-27
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 currently researched coating desensitization HMX preparation method mainly wraps paraffin wax, polyurethane layer or insensitive TATB on the surface of HMX, but these coatings will all have different degrees of debonding, resulting in poor environmental adaptability of the material

Method used

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  • Preparation method for reducing mechanical sensitivity of HMX
  • Preparation method for reducing mechanical sensitivity of HMX
  • Preparation method for reducing mechanical sensitivity of HMX

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Prepare 100 mL of Tris solution with a concentration of 10 mmol / L;

[0042] Step 2: dissolving dopamine hydrochloride in Tris solution to obtain a dopamine hydrochloride alkaline solution with a concentration of 2 g / L, and the pH value of the solution after complete dissolution is 8.5;

[0043] Step 3: Put 20g of HMX in dopamine hydrochloride alkaline solution and stir for 12 hours at a stirring rate of 300r / min to obtain a mixed dispersion;

[0044] Step 4: Suction filter and wash the mixed dispersion liquid treated in Step 3, and then wash with distilled water for 3 times; then dry at a temperature of 50° C. for 5 hours to obtain a modified HMX material.

[0045] The electron micrograph of the modified HMX material prepared in embodiment 1 is detailed in figure 1 ,from figure 1 It can be seen from the figure that the surface of the modified HMX crystal is uniformly wrapped with a thin outer layer, the microscope light source can still penetrate the crystal its...

Embodiment 2

[0049] Step 1: Prepare 100 mL of Tris solution with a concentration of 10 mmol / L;

[0050] Step 2: dissolving dopamine hydrochloride in Tris solution to obtain a dopamine hydrochloride alkaline solution with a concentration of 4g / L, and the pH value of the solution after complete dissolution is 8.5;

[0051] Step 3: Put 20g of HMX in dopamine hydrochloride alkaline solution and stir for 6 hours at a stirring rate of 300r / min to obtain a mixed dispersion;

[0052] Step 4: Suction filter and wash the mixed dispersion liquid treated in Step 3, and then wash with distilled water for 3 times; then dry at a temperature of 70° C. for 5 hours to obtain a modified HMX material.

[0053] The XRD of the modified HMX material prepared in Example 2 and the unmodified HMX material is detailed in Figure 4 ,from Figure 4 It can be seen from the figure that the crystal form of the modified HMX is consistent with that of the original HMX, both of which are in the β crystal form, indicating ...

Embodiment 3

[0056] Step 1: Prepare 100 mL of ammonia solution with a concentration of 10 mL / L;

[0057] Step 2: dissolving dopamine hydrochloride in ammonia solution to obtain a dopamine hydrochloride alkaline solution with a concentration of 2 g / L, and the pH value of the solution after complete dissolution is 10;

[0058] Step 3: Put 20g of HMX in dopamine hydrochloride alkaline solution and stir for 12 hours at a stirring rate of 500r / min to obtain a mixed dispersion;

[0059] Step 4: Suction filter and wash the mixed dispersion liquid treated in Step 3, and then wash with distilled water for 3 times; then dry at a temperature of 70° C. for 5 hours to obtain a modified HMX material.

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Abstract

The invention provides a preparation method for reducing mechanical sensitivity of HMX. The preparation method comprises the following steps of: preparing an alkali solution with a pH value being 8-11; dissolving catechol substances into the alkali solution to obtain a catechol alkali solution with concentration being 0.1g / L-20g / L, wherein the pH value of the completely dissolved solution is greater than 7; putting HMX into the catechol alkali solution and stirring for 0.1-24 hours to obtain a mixed dispersion liquid; carrying out suction filtration cleaning on the mixed dispersion liquid treated in the step III, and cleaning the mixed dispersion liquid by distilled water; drying the mixed dispersion liquid for 1-24 hours at a temperature of 50-80 DEG C to obtain an modified HMX material. The preparation method is simple in process, and physical characteristics such as crystal shape, density and the like of the HMX are not changed; and the modified HMX material has relatively low mechanical sensitivity, so that the friction sensitivity can be reduced by 30%, characteristic height is improved by more than one time, and therefore, the HMX has relatively high safety performance.

Description

technical field [0001] The invention belongs to the field of energetic materials, in particular to a preparation method for reducing the mechanical sensitivity of HMX, and the HMX material prepared by the method. Background technique [0002] With the development of modern weapon systems and energetic materials, various countries pay more and more attention to the research of insensitive ammunition and insensitive materials. Because of its high detonation energy, HMX (Octojin) is widely used in casting explosives, pouring PBX explosives, propellants and civilian blasting explosive formulations of weapon systems, but its mechanical sensitivity is still high, which limits its use. Application in low-vulnerability ammunition. [0003] In the process of developing insensitive ammunition, in order to reduce the mechanical sensitivity of HMX materials and improve environmental adaptability, a variety of additives or insensitive agents are usually added to the formula, such as par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B25/34
CPCC06B25/34
Inventor 祝青肖春谢虓李尚斌罗观
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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