Construction of self-assembled energetic microspheres with improved interfacial effect for enhanced safety

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-09-25 DOI:10.1016/j.powtec.2025.121692

Wenyu Wu , Changgui Song , Kai Yin , Xiangru Li , Xiaoyan Chen , Xiaojuan Fu , Shuangqi Hu , Xiaodong Li

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引用次数: 0

Abstract

Interfacial adhesion between the explosive particles and binders is crucial for enhancing safety and combustion properties. In this study, HMX@FOX-7 self-assembled energetic microspheres with improved interfacial adhesion were constructed using coaxial droplet microchannel technology. The influence of various binders and continuous-phase concentrations on the morphology of the microspheres was investigated. The influence of binders on particle size, dispersibility, bulk density, thermal decomposition, mechanical sensitivity (impact, friction), compression mechanical properties, and combustion behavior was analyzed. Control samples were prepared from microspheres formed by the self-assembly of untreated raw material mechanical mixtures and binders. The results show that HMX@FOX-7 self-assembled energetic microspheres exhibit a highly spherical morphology, improving interfacial adhesion between explosive particles and binders, as well as the uniformity of component distribution. Compared to the control samples, the self-assembled energetic microspheres (F-HF, P-HF, and N-HF) exhibit increased thermal decomposition activation energies by 28.53, 14.12, and 11.70 kJ·mol⁻¹, along with elevated impact energies of 6.5 J, 4.5 J, and 2.5 J, and friction forces of 72 N, 60 N, and 36 N, respectively, indicating enhanced thermal stability and mechanical safety. Ignition tests indicate that self-assembled energetic microspheres based on HMX@FOX-7 high-energy particles exhibit stronger flame intensity and a tendency toward more stable combustion behavior. This study presents an innovative strategy for constructing energetic microspheres with improved interfacial adhesion and offers new insight into the structural modulation of other energetic microspheres.

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自组装高能微球的构建改善了界面效应，提高了安全性

爆炸颗粒与粘合剂之间的界面粘附对提高安全性和燃烧性能至关重要。在本研究中，利用同轴液滴微通道技术构建了具有改善界面粘附性的HMX@FOX-7自组装高能微球。考察了不同粘结剂和连续相浓度对微球形貌的影响。分析了粘结剂对颗粒大小、分散性、堆积密度、热分解、机械敏感性（冲击、摩擦）、压缩力学性能和燃烧行为的影响。对照样品由未经处理的原料、机械混合物和粘合剂自组装形成的微球制备。结果表明：HMX@FOX-7自组装高能微球具有高度的球形形态，提高了爆炸颗粒与粘结剂之间的界面附着力，提高了组分分布的均匀性；与对照样品相比，自组装高能微球（F-HF、P-HF和N- hf）的热分解活化能分别提高了28.53、14.12和11.70 kJ·mol−1，冲击能分别提高了6.5、4.5和2.5 J，摩擦力分别提高了72、60和36 N，表明热稳定性和机械安全性得到了提高。点火试验表明，基于HMX@FOX-7高能粒子的自组装高能微球具有更强的火焰强度和更稳定的燃烧行为。本研究提出了一种构建具有良好界面粘附性的高能微球的创新策略，并为其他高能微球的结构调节提供了新的见解。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.