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Polyethyleneimine reinforced graphene insensitive energetic material and preparation method thereof

A technology of polyethyleneimine and graphene, applied in the direction of non-explosive desensitizer/passivator, offensive equipment, explosive processing equipment, etc., can solve the problems of reduced desensitization effect, weak interaction, easy peeling, etc., to achieve Improved coating effect, strong universality and simple process

Inactive Publication Date: 2020-11-13
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the surface-coated graphene material has been proven to improve the thermal stability and mechanical sensitivity of energetic materials, its weak interaction with energetic materials makes it easy to peel off in formulations such as modeling powders and grains, which makes Reduced desensitization effect

Method used

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  • Polyethyleneimine reinforced graphene insensitive energetic material and preparation method thereof
  • Polyethyleneimine reinforced graphene insensitive energetic material and preparation method thereof
  • Polyethyleneimine reinforced graphene insensitive energetic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Disperse 0.490 g of CL-20 in 30 ml H 2 Ultrasound in O for 2.0 h, and then dropwise add 4 mL of PEI (molecular weight 600) aqueous solution with a concentration of 0.5 g / L. After stirring at room temperature for 4 h, 16 mL of 0.5 g / L GO dispersion was added dropwise, and the stirring was continued for 10 h. The reaction solution was filtered, the filter cake was washed 8 times with ultrapure water, and dried in a vacuum oven at 60°C for 24 hours to obtain the CL-20 / PEI / GO composite energetic material. The impact sensitivity is 1.6J (the raw material CL-20 is 0.7J), and the friction sensitivity is 96N (the raw material CL-20 is 48N).

Embodiment 2

[0033] Disperse 0.490 g of CL-20 in 30 ml H 2 Ultrasound in O for 2.0 h, and then dropwise add 4 mL of PEI (molecular weight 1800) aqueous solution with a concentration of 0.5 g / L. After stirring at room temperature for 4 h, 16 mL of 0.5 g / L GO dispersion was added dropwise, and the stirring was continued for 10 h. The reaction solution was filtered, the filter cake was washed 8 times with ultrapure water, and dried in a vacuum oven at 60°C for 24 hours to obtain the CL-20 / PEI / GO composite energetic material. The impact sensitivity is 2.6J (the raw material CL-20 is 0.7J), and the friction sensitivity is 128N (the raw material CL-20 is 48N).

Embodiment 3

[0035] Disperse 0.490 g of CL-20 in 30 ml H 2 Ultrasound in O for 2.0 h, and then dropwise add 4 mL of PEI (molecular weight: 10,000) aqueous solution with a concentration of 0.5 g / L. After stirring at room temperature for 4 h, 16 mL of GO dispersion with a concentration of 0.5 g / L was added dropwise, and the stirring was continued for 10 h. The reaction solution was filtered, the filter cake was washed 8 times with ultrapure water, and dried in a vacuum oven at 60°C for 24 hours to obtain the CL-20 / PEI / GO composite energetic material. The impact sensitivity is 3.4J (the raw material CL-20 is 0.7J), and the friction sensitivity is 144N (the raw material CL-20 is 48N).

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Abstract

The invention discloses a polyethyleneimine reinforced graphene insensitive energetic material and a preparation method thereof. The preparation method includes the following steps that the energeticmaterial is dispersed in a water phase, a polyethyleneimine aqueous solution is slowly added under the stirring condition to obtain a first mixed solution, and the mass ratio of the energetic materialto polyethyleneimine is 98: (0.05-1.95); under the stirring condition, a graphene dispersion aqueous solution is added into the first mixed solution, a second mixed solution is obtained, and the massratio of polyethyleneimine to graphene is 1.95: 0.05-0.05: 1.95; the second mixed solution is continuously stirred for 2-10 hours to obtain a suspension; and the suspension is filtered, washed and dried to obtain the polyethyleneimine reinforced graphene insensitive energetic material. According to the method, the interaction between the insensitive agent and the energetic material can be enhanced, and the mechanical sensitivity of the energetic material is reduced.

Description

technical field [0001] The invention relates to the technical field of energetic composite materials, in particular to a polyethyleneimine-enhanced graphene passivation energetic material and a preparation method thereof. Background technique [0002] In order to meet the needs of modern wars for weapon warheads, weapons and equipment have higher and higher requirements for the comprehensive performance of single-mass energetic materials. In addition to considering the energy properties of energetic materials, it is also necessary to consider the impact of the mechanical sensitivity and thermal sensitivity of energetic materials on the safety of energetic materials. Especially for nitramine-based energetic materials with high energy density (such as CL-20, HMX, etc.) due to their high mechanical sensitivity, their application potential in weapon systems is limited. The primary consideration in the safe use of energetic materials is the mechanical sensitivity of energetic ma...

Claims

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Application Information

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IPC IPC(8): C06B45/20C06B23/00C06B21/00
CPCC06B21/0008C06B23/005C06B23/009C06B45/20
Inventor 黄琪彭汝芳宋晓敏
Owner SOUTHWEAT UNIV OF SCI & TECH
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