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Thermal and ignition properties of hexanitrostilbene(HNS) microspheres prepared by droplet microfluidics

Defence technology（防务技术） 2023年第7期25卷 166-173页

作者： Rui-shan Han Fei-peng Lu Fang Zhang Yan-lan Wang Mi Zhou Guo-sheng Qin Jian-hua Chen Hai-fu Wang En-yi Chu State Key Laboratory of Explosion and Technology Beijing Institute of TechnologyBeijing100081China Science and Technology on Applied Physical Chemistry Laboratory Shaanxi Applied Physics-Chemistry Research InstituteXi'an710061ShaanxiChina

HNS-IV(Hexanitrostilbene-IV) is the main charge of the exploding foil initiators(EFI), and the microstructure of the HNS will directly affect its density, flowability, sensitivity, and stability. HNS microspheres were prepared using droplet microfluidics, and the particle size, morphology, specific surface area, thermal performance, and ignition threshold of the HNS microspheres were characterized and tested. The results shown that the prepared HNS microspheres have high sphericity, with an average particle size of 20.52 μm(coefficient of variation less than 0.2), and a specific surface area of 21.62 m^(2)/g(6.87 m^(2)/g higher than the raw material). Without changing the crystal structure and thermal stability of HNS-IV, this method significantly enhances the sensitivity of HNS-IV to short pulses and reduces the ignition threshold of the slapper detonator to below 1000 V. This will contribute to the miniaturization and low cost of EFI.

关键词： Microfluidics HNS microspheres Thermal stability Ignition threshold

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Fabrication and performances of TaN@(Al/CuO) thin film

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International Journal of Nanomanufacturing 2023年第2期18卷 39-45页

作者： Ren, Xiao Ming Yu, Ke Xin Zhang, Jing Xin Liu, Lan Liu, Wei Xie, Ruizhen Ren, Wei Science and Technology on Applied Physical Chemistry Laboratory Shaanxi Applied Physics and Chemistry Research Institute Xi'an710061 China

To reduce the ignition energy of the reactive multilayer films and improve the ignition performance, this paper designed three types of Al/CuO, and Al/CuO was combined with TaN by micro-electro-mechanical system (MEMS) technology to prepare TaN@(Al/CuO). The experimental results were obtained by high-speed photography of the flame height. The ignition experiment results showed that: when the firing voltage was 50 V and the capacitance was 33 uf, the flame height of the Al/CuO (50 nm/100 nm) was the highest with a flame height of about 16 mm;the flame height increased with the increase of voltage, and the flame duration also increased under the same conditions. © 2023 Inderscience Enterprises Ltd.. All rights reserved.

关键词： Tantalum compounds

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Study on electrical characteristic and flyer driven ability of Al/Cu exploding foil

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International Journal of Nanomanufacturing 2023年第2期18卷 83-90页

作者： Zhou, Mi Ren, Xiao Ming Meng, Qing Ying Ren, Wei Li, Ming Yao, Hong Zhi Science and Technology on Applied Physical Chemistry Laboratory Shaanxi Applied Physics and Chemistry Research Institute Xi'an710061 China

In order to reduce the firing energy of the exploding foil blasting machine and optimised its performance, the Al/Cu exploding foil transducer element was fabricated by micro-electro-mechanical system (MEMS) technology, and its electric explosion performance and ability to drive the flyer were studied. The results showed that when the charging voltage was 1.3 KV, the energy utilisation rate of the Al/Cu exploding foil was increased by 25% compared with the traditional Cu exploding foil. Compared with the traditional Cu explosive foil initiator, the Al/Cu explosive foil initiator driven flyer speed is faster and the ignition sensitivity is higher. © 2023 Inderscience Enterprises Ltd.. All rights reserved.

关键词： Explosives

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Highly elastic 2D covalent organic framework films of interwoven single crystals

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National science Review 2024年第7期11卷 71-72页

作者： Tongwen Xu Key Laboratory of Precision and Intelligent Chemistry Department of Applied ChemistrySchool of Chemistry and Materials ScienceUniversity of Science and Technology of China

Two-dimensional(2D) materials feature angstrom-scale pores and tunable pore chemistry, demonstrating great potential for applications including flexible electronics and *** ion/molecule transport in the sub-nanometer-sized pore confinement often reveals phenomena not seen in bulk materials [1]. Yet, the practical application of 2D materials is hindered by their poor mechanical properties.

关键词： framework organic single covalent crystals elastic films highly interwoven

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Investigation on the exploding foil initiators ignition enhanced by explosion-electricity coupling

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Defence technology（防务技术） 2024年第12期42卷 1-11页

作者： Songmao Zhao Haotian Jian Ke Wang Zheng Ning Peng Zhu Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China Science and Technology on Applied Physical and Chemistry Laboratory Shanxi Applied Physics and Chemistry Research InstituteXi'an710061China Micro-Nano Energetic Devices Key Laboratory Ministry of Industry and Information TechnologyNanjing210094China Xi'an Modern Chemistry Research Institute Xi'an710061China

Explosion-electricity coupling(EEC) is a technical method to induce electric energy into the plasma material produced by explosion to improve the output of *** foil initiator(EFI) which could produce plasma during electric explosion can serve as a good carrier for studying the *** investigate the enhancement ability and mechanism of EEC in EFI ignition performance,a kind of EFI chips which could realize the EEC effect was designed and fabricated to observe the characteristics of current and voltage,flyer and plasma temperature during Boron Potassium Nitrate(BPN) ignition of the *** was found that the EEC could enhance EFI ignition in terms of energy utilization,ignition contact surface,and high-temperature sustainability of plasma:firstly,the EEC prolonged the late time discharge(LTD) phase of the electric explosion,making the energy of capacitor effectively utilized;secondly,the EEC could create a larger area of ignition contact surface;last of all,the EEC effect enhanced its hightemperature sustainability by sustaining continuous energy input to *** also was found that the ignition voltage of BPN could be reduced by nearly 600 V under the condition of 0.4 μF *** research has successfully combined EEC with EFI,revealing the behavioral characteristics of EEC and demonstrating its effective enhancement of EFI *** introduces a new approach to improving EFI output,which is conducive to low-energy ignition of EFI,and expected to take the ignition technology of EFI to a new level.

关键词： Exploding foil initiator Explosion-electricity coupling Plasma Ignition mechanism Boron potassium nitrate

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A strategy to improve the robustness of bound states in the continuum

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Nano Research 2025年第2期18卷 826-832页

作者： Peiwen Ren Zhuo Huang Renxian Gao Xiaoxiang Dong Guoya Sun Jian-Feng Li Zhilin Yang College of Physical Science and Technology State Key Laboratory of Physical Chemistry of Solid SurfacesCollege of Chemistry and Chemical EngineeringCollege of EnergyXiamen UniversityXiamen 361005China

Bound states in the continuum(BICs)supported by dielectric metasurfaces have significantly propelled the progress in optical technologies,notably for manipulating potent light-matter ***,achieving a robust quasi-BIC mode with high Q factor by adjusting geometric parameters remains a challenge,primarily the Q factors strongly depend on the asymmetricparameters andthestringentfabrication ***,we propose a novel strategy to enhance the robustness of the Q factor through the continuous excitation of the magnetic dipole mode with low energy *** a specialized multi-cell structure,the nanoarrays can continuously excite the magnetic dipoles contributed by different structural components over a broad range of geometrical parameters,exhibiting exceptional robustness and high quality *** work provides a theoretical scheme that offers new directions for obtaining robust high Q resonances and developing potential applications for high-performance optical devices.

关键词： bound states in the continuum(BICs) all-dielectric nanostructures magnetic dipole electric dipole robust high Q factor

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Synthesis of energetic materials by microfluidics

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Defence technology(防务技术) 2025年第2期44卷 306-319页

作者： Shuo Liu Chuanyu Zhang Yanlan Wang Xueyong Wei School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an 710049China School of Instrument Science and Technology Xi'an Jiaotong UniversityXi'an 710049China Science and Technology on Applied Physical Chemistry Laboratory Xi'an 710061China

Energetic materials,characterized by their capacity to store and release substantial energy,hold pivotal significance in some fields,particularly in defense ***,with its ability to manipulate fluids and facilitate droplet formation at the microscale,enables precise control of chemical *** scholarly endeavors have increasingly harnessed microfluidic reactors in the realm of energetic materials,yielding morphologically controllable particles with enhanced uniformity and explosive ***,crucial insights into microfluidic-based methodologies are dispersed across various publications,necessitating a systematic ***,this review addresses this gap by concentrating on the synthesis of energetic materials through ***,the methods based on micro-mixing and droplets in the previous papers are summarized and the strategies to control the critical parameters within chemical reactions are discussed in ***,the comparison in terms of advantages and disadvantages is *** demonstrated in the last section regarding perspectives,challenges such as clogging,dead zones,and suboptimal production yields are non-ignoble in the promising fields and they might be addressed by integrating sound,optics,or electrical energy to meet heightened *** comprehensive overview aims to consolidate and analyze the diverse array of microfluidic approaches in energetic material synthesis,offering valuable insights for future research directions.

关键词： Microfluidic technology Energetic materials synthesis Micro-mixing Micro-droplets

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Data-Driven Exploration of Polymer Processing Effects on the Mechanical Properties in Carbon Black-Reinforced Rubber Composites

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Chinese Journal of Polymer science 2024年第12期42卷 2038-2047,I0013页

作者： Zi-Long Wan Wan-Chen Zhao Hao-Ke Qiu Shu-Shuai Zhou Si-Yuan Chen Cui-Liu Fu Xue-Yang Feng Li-Jia Pan Ke Wang Tian-Cheng He Yu-Ge Wang Zhao-Yan Sun State Key Laboratory of Polymer Physics and Chemistry&Key Laboratory of Polymer Science and Technology Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China College of Chemistry Jilin UniversityChangchun130012China Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters College of Physical Science and TechnologyYili Normal UniversityYining835000China

The performance and corresponding applications of polymer nanocomposites are highly dominated by the choice of base material,type of fillers,and the processing *** black-filled rubber composites(CRC)exemplify this,playing a crucial role in various ***,due to the complex interplay between these factors and the resulting properties,a simple yet accurate model to predict the mechanical properties of CRC,considering different rubbers,fillers,and processing techniques,is highly *** study aims to predict the dispersion of fillers in CRC and forecast the resultant mechanical properties of CRC by leveraging machine *** selected various rubbers and carbon black fillers,conducted mixing and vulcanizing,and subsequently measured filler dispersion and tensile *** on 215 experimental data points,we evaluated the performance of different machine learning *** findings indicate that the manually designed deep neural network(DNN)models achieved superior results,exhibiting the highest coefficient of determination(R^(2))values(>0.95).Shapley additive explanations(SHAP)analysis of the DNN models revealed the intricate relationship between the properties of CRC and process ***,based on the robust predictive capabilities of the DNN models,we can recommend or optimize CRC fabrication *** work provides valuable insights for employing machine learning in predicting polymer composite material properties and optimizing the fabrication of high-performance CRC.

关键词： Polymer-matrix composites Mechanical properties Process modeling Machine learning

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Preliminary discussion on the ignition mechanism of exploding foil initiators igniting boron potassium nitrate

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Defence technology（防务技术） 2024年第2期32卷 222-231页

作者： Haotian Jian Guoqiang Zheng Lejian Chen Zheng Ning Guofu Yin Peng Zhu Ruiqi Shen School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China Micro-Nano Energetic Devices Key Laboratory of MIIT Nanjing University of Science and TechnologyNanjing 210094China Anhui Province Key Laboratory of Microsystem the 43rd Research Institute of CETCHefei 230088China Science and Technology on Applied Physical and Chemistry Laboratory Shanxi Applied Physics and Chemistry Research Institute Xi'an 710061China

Exploding foil initiator(EFI)is a kind of advanced device for initiating explosives,but its function is unstable when it comes to directly igniting *** solve the problem,this research aims to reveal the ignition mechanism of EFIs directly igniting *** oscilloscope,a photon Doppler velocimetry,and a plasma spectrum measurement system were employed to obtain information of electric characteristics,impact pressure,and plasma *** results of the electric characteristics and the impact pressure were inconsistent with ignition *** only thing that the ignition success tests had in common was that their plasma all had a relatively long period of high-temperature duration(HTD).It eventually concludes that the ignition mechanism in this research is the microconvection heat transfer rather than the shock initiation,which differs from that of exploding foil initiators detonating ***,the methods for evaluating the ignition success of semiconductor bridge initiators are not entirely applicable to the tests mentioned in this *** HTD is the critical parameter for judging the ignition success,and it is influenced by two factors:the late time discharge and the energy of the electric *** longer time of the late time discharge and the more energy of the electric explosion,the easier it is to expand the HTD,which improves the probability of the ignition success.

关键词： Exploding foil initiator PDV Plasma spectrum Ignition mechanism Boron potassium nitrate

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On-demand reverse design of polymers with PolyTAO

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npj Computational Materials 2024年第1期10卷 317-327页

作者： Haoke Qiu Zhao-Yan Sun State Key Laboratory of Polymer Physics and Chemistry&Key Laboratory of Polymer Science and Technology Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022 JilinChina School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026 AnhuiChina

The forward screening and reverse design of drug molecules,inorganic molecules,and polymers with enhanced properties are vital for accelerating the transition from laboratory research to market ***,due to the scarcity of large-scale datasets,the discovery of polymers via materials informatics is particularly ***,scientists have developed various machine learning models for polymer structure-property relationships using only small polymer datasets,thereby advancing the forward screening process of ***,the success of this approach ultimately depends on the diversity of the candidate pool,and exhaustively enumerating all possible polymer structures through human imagination is ***,achieving on-demand reverse design of polymers is *** this work,we curate an immense polymer dataset containing nearly one million polymeric structure-property pairs based on expert knowledge.

关键词： property thereby inorganic

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