Desensitization of CL‐20/HMX Co‐Crystal by Functionalized Graphene Oxide

Huang, Qi; Song, Yajuan; Guo, Zhicheng; Zhang, Jinhao; Jin, Bo; Guo, Yu; Peng, Rufang

doi:10.1002/prep.202200192

Cited by 7 publications

(3 citation statements)

References 33 publications

(49 reference statements)

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“…Next, co-crystal powder was dispersed uniformly in the suspension by ultrasound. The round-bottom flask that contained the suspension was stirred at 298 K for 4 h, the filtration is carried out, the deionized water is used for washing, and drying was performed in the vacuum drying box for 3 h. Finally, the gray powder CL-20/HMX-Am-GO composite (Am-GO material accounted for 2wt % [25,29]) was obtained. Figure 1 shows the preparation of composite materials.…”

Section: Preparation Of Cl-20/hmx-am-go Compositesmentioning

confidence: 99%

“…On the basis of the previous research on the thermal decomposition of co-crystals, the whole decomposition process of composite materials during heating was studied by using isothermal decomposition gas measuring device to further analyze the influence of coating materials on the thermal stability of co-crystals [23,[25][26]. The products of the composites under different thermal decomposition degrees were characterized by HPLC and FTIR, and the possible decomposition mechanism of the composites was discussed.…”

Section: Introductionmentioning

confidence: 99%

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Thermal properties of CL‐20/HMX‐Am‐GO composites

Guan

Peng

Song

et al. 2023

Propellants Explo Pyrotec

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The thermal decomposition of Hexanitrohexaazaisowurtzitane CL-20/HMXammonium formate functionalized graphene oxide (Am-GO) composites was studied using an isothermal decomposition dynamics research instrument to explore the effects of Am-GO on the stability of CL-20/HMX co-crystal. The gas pressure-time curve generated by thermal decomposition reaches the decomposition inflection point at a decomposition degree of 85 %. Compared with CL-20/HMX co-crystal, the decomposition extent corresponding to the inflection point of the thermal decomposition curve of the composites increases. The activation energies of the composites before and after the inflection point of the pressure-time curve were 161.3 kJ/mol and 171.0 kJ/mol, respectively. The residual substances produced by the thermal decomposition of the composites were characterized by HPLC and FTIR. Results showed that CL-20 and HMX were decomposed before the inflection point of the decomposition pressure-time curve. However, the decomposition of CL-20 was completed before the inflection point, whereas that of HMX ran through the thermal decomposition process. The calculation results of thermal decomposition kinetics show that the addition of coating material increases the activation energy of co-crystal and stabilizes CL-20/HMX co-crystal.

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Section: Preparation Of Cl-20/hmx-am-go Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal properties of CL‐20/HMX‐Am‐GO composites

Guan

Peng

Song

et al. 2023

Propellants Explo Pyrotec

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“…However, friction, as one of the most common stimulation methods, generates heat, which is also one of the reasons for a large number of accidents. 23 At present, the research on friction sensitivity mainly includes two aspects, reducing and predicting friction sensitivity. In order to achieve the purpose of reducing the friction sensitivity of energetic materials in the experiments, various methods, such as explosive particle refinement and surface polishing treatment, eutectic, coating, and molecular design, are usually used.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study on the correlation between the structure, excess energy, surface energy, electronic structure, nitro charge, and friction sensitivity of N,N′-dinitroethylenediamine (EDNA)

Li,

Gan,

Liu

et al. 2023

Phys. Chem. Chem. Phys.

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Preparation, characterization and thermal properties of nitrographene coated aluminum powder

Ding,

Fang,

Emu

et al. 2024

Propellants Explo Pyrotec

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Aluminum powder is commonly used as a metal fuel additive in composite solid propellants. However, its tendency to agglomerate during combustion can lead to two‐phase flow losses, negatively impacting its energy performance. To address this issue and enhance the combustion performance of aluminum powder, nitrated graphene oxide (NGO) was developed to improve aluminum dispersion and optimize its energy characteristics. Various analytical techniques were employed to examine its properties, including Fourier‐transform infrared spectroscopy (FT‐IR), scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), elemental analysis (EA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TG). Al/NGO composite was prepared using a solution‐assisted method in N, N‐dimethylformamide (DMF) and characterized by SEM, XPS and X‐ray diffraction (XRD). The ignition characteristics and heat of combustion of Al/NGO powder were measured using a laser igniter and an oxygen bomb calorimetry. The appropriate mass ratios of NGO coating had positive effects on the ignition and combustion of Al. Specially, 4 % NGO coating reduced Al ignition energy by 46.5 % and increased the Al combustion efficiency by 22.0 %. Moreover, the catalytic effect of Al/NGO on the thermal decomposition of ammonium perchlorate (AP) was investigated using differential thermal analysis (DTA). Results showed that two‐stage pyrolysis paths of AP tended to merge into a single pyrolysis process when Al/NGO4 % was added. The most favorable catalytic effect on AP′s thermal decomposition process was produced with the addition of 10 % Al/NGO4 %, reducing the activation energy by Kissinger equation for high‐temperature decomposition to 107.7 kJ mol−1. These findings may provide valuable insight for enhancing the performance of aluminum powder in energetic materials through NGO modification.

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Desensitization of CL‐20/HMX Co‐Crystal by Functionalized Graphene Oxide

Cited by 7 publications

References 33 publications

Thermal properties of CL‐20/HMX‐Am‐GO composites

Thermal properties of CL‐20/HMX‐Am‐GO composites

Theoretical study on the correlation between the structure, excess energy, surface energy, electronic structure, nitro charge, and friction sensitivity of N,N′-dinitroethylenediamine (EDNA)

Preparation, characterization and thermal properties of nitrographene coated aluminum powder

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