Preparation and Characterization of TATB/VitonA Nanocomposites

Xu, Wenzheng; Pang, Zhaoying; Wang, Jingyu; Ping, Chao; Wang, Jie; Peng, Jinyu

doi:10.1155/2018/9721730

Cited by 10 publications

(3 citation statements)

References 22 publications

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“…Klaumunzer [7] and Jiang [8] recrystallized RDX and HMX, respectively, improving crystal quality and showing desensitization against stimuli from impact. It is not difficult to see that these two steps are usually carried out separately in existing studies [9][10][11][12][13][14]. However, the improvement of crystal quality by recrystallization does not necessarily have the effect of desensitization, and simply coating insensitive materials is often accompanied by a large loss of energy.…”

Section: Introductionmentioning

confidence: 99%

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

Yu,

Jiang,

et al. 2023

Propellants Explo Pyrotec

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In order to improve the security of 1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocane (HMX) preparation and application process, microfluidic technology was used to improve the crystal quality and surface coating in one step. Using polydopamine (PDA) as coating material, the insensitive HMX@PDA particles were prepared. The morphology, particle size and crystal form of HMX@PDA are regulated by supersaturation. When the concentration of HMX is 0.15 g ⋅ mL−1, the flow ratio of the two‐phase solution is 1 : 1, and the total flow rate is 10 mL ⋅ min−1, the properties of the samples were optimized to the greatest extent. At this point, the particle size of the sample was about 25 μm, SPAN value is 1.02, which is a stable β‐HMX@PDA at room temperature. Through the test, the friction sensitivity and impact sensitivity of HMX@PDA were 36 % and 56 %, which were 52 % and 28 % lower than that of raw HMX, respectively. Meanwhile, the energy of HMX@PDA was not significantly decreased. Thermal analysis showed that PDA inhibited the β→δ crystallization process of HMX at high temperature but did not affect the thermal decomposition process of HMX. This case of preparing HMX@PDA in one‐step with microfluidic technology provides a new idea for the desensitization of energetic materials in the future.

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Section: Introductionmentioning

confidence: 99%

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

Yu,

Jiang,

et al. 2023

Propellants Explo Pyrotec

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“…If the warhead of AGM-114 N was not perfectly cylindrical, it would be almost impossible to load. Compositions based on exotic reducing agents like boron, nanomaterials or core-shell particles have also been studied, but for now, they remain laboratory curiosity without practical use [1,[27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Aluminized Enhanced Blast Explosive Based on Polysiloxane Binder

Kolev

Tsonev²

2021

Propellants Explo Pyrotec

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Drastic measures are taken in order to improve the properties of enhanced blast explosives. First, a binder with high reactivity as reducing agent is selected. The binder, platinum cure silicone, generates pyrophoric decomposition products in situ during the detonation. Arising problems with curing inhibition of the polymer are solved, as nanosized SiO2 is employed as hardening catalyst carrier. Quantum calculations show specific interactions of the binder and aluminum, forming the backbone of the composition. Furthermore, particle size distribution of the main fuel, aluminum powder, is selected so the Al will have enough time to heat, ignite and burn in the atmosphere, creating the thermobaric effect. Potassium perchlorate is employed as an oxidizer, as it reacts with detonation products faster than the widely used ammonium perchlorate. The resulting enhanced blast explosive is denoted as H‐TBX. High speed camera results show similar shock wave velocity 2.5 m from 2.7 kg TNT charge (2 ms after initiation) and 3.5 m from 2.65 kg H‐TBX charge (3 ms after initiation). In the open field, the H‐TBX generates 1.83 times higher peak pressure and 2 times higher impulse than TNT. These findings are compared with data from the literature for Tritonal, PBXN‐109 and AFX‐757. H‐TBX has improved parameters over the former generations of enhanced blast explosives and is currently used in multiple weapons systems.

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“…The results indicated that CL-20 in the nanocomposite took the form of an α polymorph, and the nanocomposite had much lower sensitivity. Xu et al [15] prepared nano-TATB particles by ultrasonic-assisted spray method and used molecular dynamics simulation to select the best binder VitonA. The composite particles had higher thermal stability and lower mechanical sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation and Properties Study of CL-20/TATB/VitonA Composite Microspheres by a Spray-Drying Process

Hou

Jia

et al. 2020

Journal of Nanomaterials

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To improve the safety of ammonium nitrate explosives, a one-step method involving the formation of CL-20/TATB/VitonA composite microspheres using spray drying is presented. The crystal morphology, particle size, crystal structure, thermal properties, and sensitivity of raw materials of CL-20 and TATB, CL-20/VitonA particles, and CL-20/TATB/VitonA microspheres were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and impact and friction sensitivity tests. The SEM results show that the prepared CL-20/TATB/VitonA composites with micro-/nanoscale grain size have a good spherical shape. Thermal analysis data show that TATB coating enhances the thermal stability of CL-20/VitonA. The impact and friction sensitivity results show that superior mechanical properties of these composite microspheres could be maintained. Obviously, this approach is an effective desensitization technique to prepare composite microspheres for explosives.

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Preparation and Characterization of TATB/VitonA Nanocomposites

Cited by 10 publications

References 22 publications

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

One‐step preparation and characterization of insensitive HMX@PDA particles with microfluidic technology

Aluminized Enhanced Blast Explosive Based on Polysiloxane Binder

Facile Preparation and Properties Study of CL-20/TATB/VitonA Composite Microspheres by a Spray-Drying Process

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