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Graphene toughened two-dimensional high-nitrogen material doped nitramine oxidant and preparation method

A technology of graphene and oxidant, which is applied in the direction of offensive equipment, non-explosive stabilizers, explosives processing equipment, etc., can solve the problems of poor thermal stability and reduce the energy density of energetic crystals, and achieve improved thermal stability, reduced risk, crystal The effect of increased density

Inactive Publication Date: 2021-01-26
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0007] In order to avoid the deficiencies of the prior art, the present invention proposes a graphene-toughened two-dimensional high-nitrogen material doped with nitramine oxidant and its preparation method to solve the problem of poor thermal stability of ammonium nitrate energetic crystals and the prior art Modification to reduce the energy density of energetic crystals

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  • Graphene toughened two-dimensional high-nitrogen material doped nitramine oxidant and preparation method

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[0036] A preparation method for graphene toughened two-dimensional high-nitrogen materials doped with nitramine oxidants, specifically referring to high-energy explosives such as RDX, HMX, BCHMX and CL-20; during the doping process, graphene toughened two-dimensional high-nitrogen The mass content of the material (graphene oxide, triaminoguanidine nitrate and 40% glyoxal solution forming a two-dimensional structure with confinement effect on the nitramine oxidant) is 0.5wt% to 1.5wt%, and the mass content of the nitramine oxidant The content is 98.5wt% to 99.5wt%; GO has excellent conductivity, which can optimize the surface morphology and particle size distribution of nitramine crystals, thereby reducing its sensitivity; two-dimensional triaminoguanidine-glyoxal polymer (TAGP) layer The superposition of will produce a molecular-level compression effect, leading to a higher density of nitramine oxidants with altered conformations. This preparation method is characterized in th...

Embodiment 1

[0052] A method for preparing graphene-toughened two-dimensional high-nitrogen material doped ε-CL-20 crystals, comprising the following process steps:

[0053] Preparation of graphene oxide suspension:

[0054] Weigh 20 mg of GO and add it into 10 mL of water (or other organic solvents, such as ethanol, propanol, dimethylformamide, dimethyl sulfoxide, etc.), and ultrasonically disperse for 60 minutes to obtain a graphene oxide suspension (configuration concentration 2mg / ml);

[0055] Prepare deionized water solution of EDC and NHS:

[0056] Add 4mg EDC and 3mg NHS to 3ml deionized water, shake well to dissolve;

[0057] Preparation of GO-TAG:

[0058] Add the obtained EDC and NHS deionized aqueous solution to the GO suspension at a temperature of 70-75°C, and react at this temperature for 30 minutes to obtain a GO dispersion with activated carboxyl groups; then add 200 mg TAGN to the above mixture, and react After 4 hours, a black flocculent precipitate of GO-TAG was obta...

Embodiment 2

[0064] A method for preparing graphene-toughened two-dimensional high-nitrogen material doped ε-CL-20 crystals, comprising the following process steps:

[0065] Preparation of graphene oxide suspension:

[0066] Weigh 20 mg of GO and add it into 10 mL of water (or other organic solvents, such as ethanol, propanol, dimethylformamide, dimethyl sulfoxide, etc.), and ultrasonically disperse for 60 minutes to obtain a graphene oxide suspension (configuration concentration 2mg / ml);

[0067]Prepare deionized water solution of EDC and NHS:

[0068] Add 4mg EDC and 3mg NHS to 3ml deionized water, shake well to dissolve;

[0069] Preparation of GO-TAG:

[0070] Add the obtained EDC and NHS deionized aqueous solution to the GO suspension at a temperature of 70-75°C, and react at this temperature for 30 minutes to obtain a GO dispersion with activated carboxyl groups; then add 200 mg TAGN to the above mixture, and react After 4 hours, a black flocculent precipitate of GO-TAG was obtai...

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Abstract

The invention relates to a graphene toughened two-dimensional high-nitrogen material doped nitramine oxidant and a preparation method. The mass content of the graphene toughened two-dimensional high-nitrogen material is 0.5 wt%-1.5 wt%, and the mass content of the nitramine oxidant is 98.5 wt%-99.5 wt%; the graphene toughened two-dimensional high-nitrogen material is of a two-dimensional structurewhich is formed by graphene oxide, triaminoguanidine nitrate and a 40% glyoxal solution and has a confinement effect on a nitramine oxidant. By introducing the graphene oxide, the risk in the operation process is reduced; the ammonium nitrate energetic material with higher stability and density, namely the GO-TAGP doped ammonium nitrate energetic material, is prepared, the crystal density is improved, and the molecular structure is not changed; the increase of the crystal transformation temperature (or the disappearance of the crystal transformation process) indicates that the thermal stability is improved.

Description

technical field [0001] The invention belongs to the technical field of energetic materials, and relates to a graphene-toughened two-dimensional high-nitrogen material doped with nitramine oxidant and a preparation method thereof, in particular to a graphene-toughened two-dimensional high-nitrogen material doped with nitramine oxidant (RDX , HMX, BCHMX, CL-20) preparation method. Background technique [0002] In recent years, ammonium nitrate-based energetic materials (such as RDX, HMX, BCHMX, CL-20) have attracted extensive attention due to their high energy density, but due to the problem of polymorph transformation, their In the presence of CL-20 and its C4 bonded explosives (I): thermodynamic properties and decomposition kinetics. J Therm Anal Calorim 2013;112(2):823-836). Take hexanitrohexaazaisowurtzitane (CL-20) as an example, which is a polymorphic explosive, and there are four crystal forms of α-, β-, γ-, and ε- at normal temperature and pressure. , in order to ov...

Claims

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Application Information

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IPC IPC(8): C06B45/00C06B23/00C06B21/00
CPCC06B21/0091C06B23/006C06B45/00
Inventor 严启龙黄彬彬薛智华毕永堪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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