Facile formation of nitrocellulose-coated Al/Bi 2 O 3  nanothermites with excellent energy output and improved electrostatic discharge safety

Dai, Ji; Xu, Jianbing; Wang, Fei; Ma, Tai-Yu; Shen, Yun; Shen, Ruiqi

doi:10.1016/j.matdes.2018.01.056

Cited by 80 publications

(24 citation statements)

References 54 publications

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“…The output power was corrected by an optical power meter before each ignition experiment. The optical emission indicates an ignition event, which could be used to measure the ignition delay time (Dai et al 2018b). The ignition delay time was de ned by the time difference from the triggering of the laser to the initial photo signal of igniting ame.…”

Section: Laser Ignition Testsmentioning

confidence: 99%

Enhanced Thermal Decomposition and Laser Ignition Properties of Nanostructured NC/Al/RDX Composite Fibers Fabricated by Electrospinning

Wang¹,

Li²,

Yang³

et al. 2021

Preprint

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Nano Al has always been the research hotspot in the field of energetic materials because of its high energy density and combustion temperature, and has been considered as a fuel to enhance the energy release of various propulsive systems. In this work, nanocomposite fibers were fabricated by electrospinning technology, in which nano Al and recrystallized RDX particles were integrated with NC fibers. The morphology and chemical components of NC/Al, NC/RDX, and NC/Al/RDX composite fibers were characterized by XRD, FT-IR, SEM, TEM and BET. The agglomeration of nano Al particles in fibers is significantly inhibited, and the recrystallized RDX and nano Al particles are uniformly dispersed in NC fibers, resulting in the rough surfaces of the composite fibers. The thermal analysis shows that nano NC fibers have lower thermal decomposition temperature (202.1 ℃) and apparent activation energy (149.32 kJ mol-1) than raw NC (208.2 ℃ and 218.5 kJ mol-1), and NC/Al/RDX exhibits improved thermal decomposition properties compared with NC/RDX and NC/Al. The laser ignition experiments suggest that the uniformly dispersed nano Al particles could obviously promote the combustion and shorten ignition delay time. However, RDX may delay ignition due to its high decomposition temperature, but can significantly enhance the combustion properties of NC/Al/RDX fibers. Among the all samples, the NC/Al/RDX (1:1:0.2) exhibits shortest ignition delay time and most violent combustion flames, which can be attributed to the fibrous structure and the enhanced heat and mass transfer between the components.

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Section: Laser Ignition Testsmentioning

confidence: 99%

Enhanced Thermal Decomposition and Laser Ignition Properties of Nanostructured NC/Al/RDX Composite Fibers Fabricated by Electrospinning

Wang¹,

Li²,

Yang³

et al. 2021

Preprint

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“…Nitrocellulose (NC) is the most common energetic polymeric binder; NC can offer gaseous products of 871 l/kg and explosion heat of 4312 kJ/kg [17]. NC can be employed as energetic binder for advanced electric match compositions [18]. These features can offer enhanced propagation index (PI).…”

Section: Introductionmentioning

confidence: 99%

Nitrocellulose Catalyzed With Manganese Oxide Nanoparticles: Advanced Energetic Nanocomposite With Superior Decomposition Kinetics

Elbasuney

Yehia

Saadoune

et al. 2021

Preprint

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Nanostructured energetic materials can fit with advanced energetic first-fire, and electric bridges (microchips). Manganese oxide, with active surface sites (negatively charged surface oxygen, and hydroxyl groups) can experience superior catalytic activity. Manganese oxide could boost decomposition enthalpy, ignitability, and propagation rate. Furthermore manganese oxide could induce vigorous thermite reaction with aluminium particles. Hot solid or liquid particles are desirable for first-fire compositions. This study reports on the facile fabrication of MnO2 nanoparticles of 10 nm average particle size; aluminium nanoplates of 100 nm average particle size were employed. Nitrocellulose (NC) was adopted as energetic polymeric binder. MnO2/Al particles were integrated into NC matrix via co-precipitation technique. Nanothermite particles offered an increase in NC decomposition enthalpy by 150 % using DSC; ignition temperature was decreased by 8 0C. Nanothemrite particles offered enhanced propagation index by 261 %. Kinetic study demonstrated that nanothermite particles experienced drastic decrease in NC activation energy by - 42, and - 40 KJ mol-1 using Kissinger and KAS models respectively. This study shaded the light on novel nanostructured energetic composition, with superior combustion enthalpy, propagation rate, and activation energy.

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“…Reactive multilayer films (RMFs) have aroused much attention owing to their fast energy release rate and large amount of reaction heat . RMFs are a significant kind of thermite nanoenergetic multilayer film.…”

Section: Introductionmentioning

confidence: 99%

Influence of Interface Layer on the Properties of Exploding Foil Flyer Generator by Integrating Al/Ni Multilayers

Wang

Zhou²,

Jiang

et al. 2020

Physica Status Solidi (a)

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Reactive multilayer films (RMFs) are a type of a thermite nanoenergetic multilayer film, which can be potentially applied to an exploding foil flyer generator (EFFG). Herein, Al/Ni RMFs with a bilayer thickness of 500 nm are integrated into an exploding foil layer by a magnetron sputtering method. The effects of interface layer on the properties of the EFFG are systematically investigated in terms of the electrical behavior and flyer velocity. The interface layer is controlled by annealing, whose structure and chemical composition are confirmed by X‐ray diffraction and transmission electron microscopy. The periodic multilayer structure can be clearly visible, and the thickness of interface layer increases with increasing annealing temperatures from room temperature to 573 K. The EFFG integrating as‐deposited Al/Ni RMFs exhibits improved exploding properties with a short exploding time, violent explosion region, and high flyer velocity phenomenon in comparison with generator at 573 K. Overall, the EFFGs integrated Al/Ni RMFs with larger interface layers can decrease the electrical plasma performances, which are significant for investigating the applicability in various engineering fields.

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Facile formation of nitrocellulose-coated Al/Bi 2 O 3 nanothermites with excellent energy output and improved electrostatic discharge safety

Cited by 80 publications

References 54 publications

Enhanced Thermal Decomposition and Laser Ignition Properties of Nanostructured NC/Al/RDX Composite Fibers Fabricated by Electrospinning

Enhanced Thermal Decomposition and Laser Ignition Properties of Nanostructured NC/Al/RDX Composite Fibers Fabricated by Electrospinning

Nitrocellulose Catalyzed With Manganese Oxide Nanoparticles: Advanced Energetic Nanocomposite With Superior Decomposition Kinetics

Influence of Interface Layer on the Properties of Exploding Foil Flyer Generator by Integrating Al/Ni Multilayers

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