Preparation, Energetic Properties and Combustion Characteristics of Explosive-Embedded Nanoenergetic Composite Arrays

Project: Research

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Description

Energetic materials, mainly including explosives, pyrotechnics and propellants, are widelyused in various civilian and military applications such as mining, deconstruction, automobileairbags, ordnance, and space technology. Energetic materials can be generally categorized asmonomolecular energetic materials (such as explosive compound 2,4,6-trinitrotoluene, TNT)and energetic composites (such as gun powder and rocket propellant). Normally,monomolecular energetic materials exhibit ultrahigh energy-release rates, but their energydensity is low; on the contrary, energetic composites have high energy density, but theirreaction rates are much lower than those of explosive compounds.Nanoenergetic composites inherit the high-energy-density merit of traditional energeticcomposites. At the same time, as the mass diffusion distance reduces and interfacial areaincreases drastically, the reaction rate is boosted. Although nanoenergetic composites havebeen explored for more than two decades, two crucial aspects are less investigated. First, fewstudies were concerned with the combination of nanoenergetic composites and explosives.Actually, promising synergetic effects are foreseen from the combination. The gas generationfrom explosive decomposition can contribute to the convective flame propagation ofnanoenergetic composites, and the high heat release from nanoenergetic composites cancompensate the heat loss and thus facilitate the application of explosives in miniaturizeddevices. Second, the combustion propagation mechanism of nanoenergetic composites atmicro scale is not fully understood. One key application of nanoenergetic composites is tofunction as the energy source for micro systems. Thus the micro scale combustion behaviorneeds to be comprehensively investigated.This project will synthesize novel explosive-embedded nanoenergetic composites whichare based on metal oxide nanosphere arrays. The nanosphere arrays will be prepared byinterfacial self-assembly of colloidal particles. Explosives will then be formed among thevoids of nanosphere arrays by controlled crystallization. The preparation process can berepeated to achieve controllable multiple layers of explosive-embedded nanoenergetic arrays.The energetic properties and combustion/explosion characteristics will be studiedcomprehensively and in depth. Special effort will be given to combustion/explosion behaviorat micro scale. Broadly speaking, the proposed project will enable us to explore moremysteries of energetic materials, namely, the wide region between nanoenergetic compositesand explosives on the “Map of Energetic Materials”. More specifically, implementation of theproject will enrich the knowledge about the energetic materials in terms of constructionmethod of explosive-embedded nanoenergetic arrays, pressure and heat compensationmechanisms, and combustion behaviors at micro scale. The research outputs can also serve asguidance to the future practical applications.

Detail(s)

Project number9042215
Grant typeGRF
StatusFinished
Effective start/end date1/10/1510/03/20

    Research areas

  • Nanoenergetic composites,Explosives,Energetic properties,Combustion characteristics,