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Programming an efficient technique for designing smart C-doped MIC with dual self-protection forinformation and high-energy

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Rare Metals 2024年第12期43卷 6694-6703页

作者： Xiao-Gang Guo Tao-Tao Liang Hui-Sheng Huang Bin-Fang Yuan Fu-Lan Zhang Yi-Huang Chen Lu Liu Xun Cui Chongqing Key Laboratory of Inorganic Special Functional Materials College of Chemistry and Chemical EngineeringYangtze Normal UniversityChongqing408100China Department of Orthopedic Surgery Chongqing Sports Medicine CenterSouthwest HospitalThe Third Military Medical UniversityChongqing400038China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou325035China Institute of Sustainability for Chemicals Energy and Environment(ISCE2)Agency for ScienceTechnology and ResearchSingapore627833Singapore State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan430200China

Constructing self-protected metastable intermolecular composites(MICs) enables the regulation of microstructures towards boosting controllable detonation performance,and also prevents information leakage,which is meaningful but ***,a convenient and efficient method of combining highly-controlled electrophoretic assembly,surface modification and microwave heat treatment was employed to design promising heattriggered wettability switchable high-energy smart C-doped Al/Cr_(2)O_(3)MIC,and surface modification mechanism was proposed,*** anti-wetting ability of the product was demonstrated by a series of tests of water contact angle,impact resistance,immersion,selfcleaning,*** key information recording/encryption procedures were realized by constructing a hydrophilic/hydrophobic interface and adjusting the wettability of the *** addition,the output heat of asobtained smart MIC can reach ~1.5 kJ·g^(-1),and its attenuation rate was only ~30% even after underwater aging,further verifying its potential ***,our design provides a promising strategy for engineering smart MIC with diversified functional structures for blasting applications and beyond.

关键词： High-energy MIC Information self-protection Exothermicity Stability

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Electric field-induced alignment and orientation of dielectric fibers: Mechanisms, modelling, and experimental analysis

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Ceramics International 2025年

作者： Li, Wenjie Jiang, Yuncong Wu, Lianfeng Wang, Chen Liu, Hang Jiang, Siyi Zhou, Xin Mu, Yuwen Xu, Lingfeng He, Xiaodong Li, Mingwei He, Fei National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology China State Key Laboratory of Marine Coatings Marine Chemical Research Institute Co. Ltd. China National Key Laboratory for Precision Hot Processing of Materials Harbin Institute of Technology China

Electric field-induced alignment of dielectric fibers (DFs) is a promising method for controlling the orientation of fibers in composites. In this work, we investigated the mechanisms of electric field-induced alignment and its influence on the orientation of DFs in a solution medium. Through modelling and experimental analysis, we demonstrate that the application of an electric field to a suspension of DFs results in the fibers alignment along the direction of the field. This alignment process occurs due to the interaction between the electric field and the dipole moments of the fibers. Furthermore, we explore the factors affecting the process of alignment, such as the strength of the applied electric field, the dielectric constants of fibers and solution, and the characteristics of the fibers. Overall, electric field-induced alignment offers a versatile and efficient method, enabling the development of advanced materials with tailored properties for various industrial applications. © Elsevier Ltd and Techna Group S.r.l.

关键词： Dielectric fibers Electric field Directional orientation Analytical modelling

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Exploring the Multi-Scale Evolution Mechanism of the Ultra-High-Temperature Mechanical Behaviour of Carbon/Carbon composites

SSRN

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SSRN 2024年

作者： Song, Lichao Meng, Songhe Zhang, Ying Yang, Fan Xie, Weihua National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China Key Laboratory of Advanced Functional Composite Materials Aerospace Research Institute of Materials & Processing Technology Beijing100076 China

The microstructure and mechanical properties of Carbon/Carbon (C/C) composites were investigated after ultra-high-temperature heat treatment (HTT) in the range of 30 – 2950 °C. The effect mechanism of high temperatures on the mechanical behaviour of C/C composites was proposed for three scales, i.e., graphene sheets, carbon fibre (CF) monofilaments, and C/C composites. The results displayed that the tensile strength of CF monofilaments decreases monotonically as the HTT increases in the range of 2000 – 2950 °C, while C/C composites present a tendency to decrease and then increase, demonstrating that CF/matrix interfacial properties play a decisive role in the tensile properties. The compression and flexural properties showed a trend opposite to the tensile properties, Young’s modulus of both CF monofilaments and C/C composites increases. A turning point in the microstructure of C/C composites was observed after HTT at 2700 °C, in which the graphitisation degree decreases and the size of graphene sheets becomes fluctuating, while the high-temperature mechanical properties began to be superior to room temperature (RT). The high-temperature mechanical properties of C/C composites were regulated by the competing mechanisms of the graphite crystallite structure and the skin-core structure of CF monofilament, the CF/matrix interfacial strength and the porosity of C/C composites. © 2024, The Authors. All rights reserved.

关键词： Carbon fibers

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Solvent‑aided phase separation in hydrogel towards significantly enhanced mechanoresponsive strength

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Acta Mechanica Sinica 2021年第5期37卷 757-766,I0001页

作者： Haibao Lu Ziyu Xing Mingji Chen Kai Yu Yong Qing Fu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Department of Mechanical Engineering University of Colorado DenverDenverCO 80217USA Faculty of Engineering and Environment University of NorthumbriaNewcastle upon Tyne NE18STUK

Understanding working principles and thermodynamics behind phase separations,which have significant influences on condensed molecular structures and their performances,can inspire to design and fabricate anomalously and desirably mechanoresponsive ***,a combination of techniques from physicochemistry and mechanics has yet been established for the phase separation in *** this study,a thermodynamic model is firstly formulated to describe solvent-aided phase and microphase separations in the hydrogels,which present significantly improved mechanoresponsive ***-Huggins theory and interfacial energy equation have further been applied to model the thermodynamics of concentration-dependent and temperature-dependent phase *** intricately detailed phase map has finally been formulated to explore the working *** thermodynamic methodology of phase separations,combined with the constitutive stress-strain relationships,has a great potential to explore the working mechanisms in mechanoresponsive hydrogels.

关键词： Hydrogel Mechanoresponsive Phase separation Microphase separation

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Parameter-Sharing-Based Average-Consensus Time Synchronization in IoT Networks

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IEEE Internet of Things Journal 2023年第9期10卷 8215-8227页

作者： Shi, Fanrong Yang, Simon X. Mukherjee, Mithun Jiang, Hong Da Costa, Daniel Benevides Wong, Wing-Kwong Southwest University of Science and Technology Robot Technology Used for Special Environment Key Laboratory of Sichuan Province School of Information Engineering Mianyang621010 China School of Engineering University of Guelph Advanced Robotics and Intelligent Systems Laboratory GuelphONN1G 2W1 Canada Nanjing University of Information Science and Technology School of Artificial Intelligence School of Future Technology Nanjing210044 China Technology Innovation Institute Abu Dhabi United Arab Emirates National Yunlin University of Science and Technology Future Technology Research Center Douliu64002 Taiwan

Average-consensus protocol is one of the ways to develop distributed time-synchronization algorithms in Internet of Things (IoT) networks. However, the large number of iteration leads to a common time notion issue in nodes. This poses a critical challenge in the convergence of the time-synchronization algorithm and resulting asymptotic convergence in the average consensus protocol. In this article, a parameter-sharing-based average-consensus time-synchronization (PACTS) algorithm is proposed. For fast convergence, the proposed PACTS quickly forwards the time information to multihop nodes and employs multihop average-consensus instead of single-hop average consensus. Specifically, a node asynchronously and periodically broadcasts the relative clock offset estimation of neighbors with its local time information. Meanwhile, the relative clock offset estimation of the multihop node is calculated and used to estimate the average value. Consequently, an average consensus among local multihop nodes is obtained. As a result, the iteration number and convergence time are significantly reduced over the network. Finally, the experimental results indicate that the proposed PACTS algorithm has low complexity, high accuracy, and quick convergence. © 2023 IEEE.

关键词： Topology

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Au nanospheres modified boron-doped diamond microelectrode grown via hydrogen plasma etching solid doping source for dopamine detection

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Journal of Materials science & technology 2020年第14期47卷 42-46页

作者： Kaili Yao Xiaojun Tan Bing Dai Jie Bai Qiaoyang Sun Wenxin Cao Jiwen Zhao Lei Yang Jiecai Han Jiaqi Zhu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin150080China

Boron doped diamond(BDD)electrode is a promising electrochemical material for detecting dopamine level in the human’s *** this work,we developed a new doping source-graphite and solid boron oxide powders to synthesize BDD film with microwave plasma chemical vapor deposition,so as to avoid using toxic or corrosive dopants,such as boroethane and *** synthesized BDD film is pinhole free and with high doping density of 8.44×10^20 cm^-3 calculated from the Raman ***,Au nanospheres were decorated on the surface of BDD film to improve electrochemical performance of the BDD *** Au nanoparticles modified BDD electrode demonstrates an excellent electrochemical response,a high sensitivity(in the range of 5μM-1 m M),and a low detection limit(~0.8μM)for detecting dopamine.

关键词： Boron doped diamond Graphite powders Boron oxide powders Optical emission spectroscopy Dopamine

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Super broadband absorbing hierarchical CoFe alloy/porous carbon@carbon nanotubes nanocomposites derived from metal-organic frameworks

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Journal of Materials science & technology 2022年第23期118卷 218-228页

作者： Siyao Guo Yunfeng Bao Ying Li Hailong Guan Dongyi Lei Tiejun Zhao Baomin Zhong Zhihong Li School of Civil Engineering Qingdao University of TechnologyQingdao 266033China Postdoctoral Workstation Guangdong Dongpeng Holding Company LimitedGuangdong 528031China Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao University of TechnologyQingdao 266033China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in special Environments Harbin Institute of TechnologyHarbin 150080China

The exploitation of electromagnetic wave absorption(EMA) materials has attracted ever-increasing attention,not only because electromagnetic wave(EMW) originated from overuse of electronic products has threatened human' health seriously,but also because EMA materials can effectively protect radar stealth from being ***,it is still a challenge to obtain broadband and efficient EMA materials to satisfy practical *** this work,we developed a series of hierarchical CoFe alloy/porous carbon@carbon nanotubes(CoFe/PC@CNTs) nanocomposites through revising the proportion of Fe^(2+) in the metal-organic frameworks(MOFs)(CoFe-ZIF) precursor and one-step simple pyrolysis *** cross deposition between CoFe alloy,carbon nanotubes(CNTs),and porous carbon(PC) formed a double conductive network,favoring for achieving excellent EMA ***,when the filler mass ratio is only 10 wt%,the optimized CoFe/PC@CNTs nanocomposites display the best EMA capability,whose minimum reflection loss(RL_(min)) value is-68.94 dB at 13.69 GHz and the effective absorption band(EAB,<-10 dB) reaches up 9.14 GHz with a matching thickness of 2.63 *** addition,the largest EAB can achieve up to 11 GHz(3.35-14.35 GHz) during all matching *** splendid EMA performance benefits the favorable dielectric loss provided by the double conductive network,the good magnetic loss benefited from the evenly distributed CoFe alloy,the excellent impedance matching,rich transmission paths,and multiple ***,such EMA materials with super broadband absorbing provide desirable candidates for lightweight and high-efficient microwave absorbers.

关键词： Electromagnetic wave absorption CoFe alloy/porous carbon@carbon nanotubes nanocomposites Broadband absorbing Metal-organic frameworks

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Stabilizing High-Nickel Cathodes via Interfacial Hydrogen Bonding Effects Using a Hydrofluoric Acid-Scavenging Separator

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Engineering 2024年第8期39卷 117-126页

作者： Shijie Zhong Liwei Dong Botao Yuan Yueyao Dong Qun Li Yuanpeng Ji Yuanpeng Liu Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments &Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

Nickel-rich layered Li transition metal oxides are the most promising cathode materials for high-energydensity Li-ion ***,they exhibit rapid capacity degradation induced by transition metal dissolution and structural reconstruction,which are associated with hydrofluoric acid(HF)generation from lithium hexafluorophosphate *** potential for thermal runaway during the working process poses another *** are promising components to alleviate the aforementioned ***,an ultrathin double-layered separator with a 10 lm polyimide(PI)basement and a 2 lm polyvinylidene difluoride(PVDF)coating layer is designed and fabricated by combining a nonsolvent induced phase inversion process and coating *** PI skeleton provides good stability against potential thermal shrinkage,and the strong PI-PVDF bonding endows the composite separator with robust structural integrity;these characteristics jointly contribute to the extraordinary mechanical tolerance of the separator at elevated ***,unique HF-scavenging effects are achieved with the formation of-CO…H-F hydrogen bonds for the abundant HF coordination sites provided by the imide ring;hence,the layered Ni-rich cathodes are protected from HF attack,which ultimately reduces transition metal dissolution and facilitates long-term cyclability of the Ni-rich ***||NCM811 batteries(where“NCM”indicates LiNi_(x)Co_(y)Mn_(1-x-y)O_(2))with the proposed composite separator exhibit a 90.6%capacity retention after 400 cycles at room temperature and remain sustainable at 60℃with a 91.4%capacity retention after 200 *** adopting a new perspective on separators,this study presents a feasible and promising strategy for suppressing capacity degradation and enabling the safe operation of Ni-rich cathode materials.

关键词： Nickel-rich cathodes Composite separator HF scavenging Transition metal dissolution Long-term cyclability

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Regulation Strategy of Transition Metal Oxide-Based Electrocatalysts for Enhanced Oxygen Evolution Reaction

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Accounts of Materials Research 2022年第10期3卷 1088-1100页

作者： Yuanyuan Zhang Qiang Fu Bo Song Ping Xu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China School of Physics Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China

CONSPECTUS:The deployment of hydrogen as alternative energy carrier is a promising route to reduce the consumption of fossil fuel and achieve the“zero carbon”*** electrolysis,powered by renewable energy sources,is regarded as the most environmentally friendly and efficient technology for hydrogen ***,the sluggish oxygen evolution reaction(OER)process at the anode predominantly limits the efficiency of water electrolysis.

关键词： Transition Oxygen hydrogen

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A Multi-Bionic Design Strategy for Flexible, Efficient and Robust High-Performance Energy Absorption Systems Based on Interlocking Sutures Integrated with Bouligand-Arranging Perforations

SSRN

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SSRN 2024年

作者： Wang, Chao Li, Jiaxuan Sui, Chao Sang, Yuna Zhou, Yichen Zang, Zifu Zhao, Yushun He, Xiaodong National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China School of Astronautics Harbin Institute of Technology Harbin150001 China

As an emerging protective device, the self-locked systems are lightweight, flexible, customizable, and portable. However, existing systems suffer from a low degree of deformation and mechanically inefficient connection structures. To address these issues, a multi-bionic design strategy for high-performance self-locked system was proposed in this work, which perfectly combines the robust joint structure of the interlocking suture with the efficient deformation mode of the Bouligand structures. In the design process, the interlocking suture-inspired system was first studied separately, and its structural stability and deformation behavior were investigated through FEM simulations and experiments. The results showed that, the self-locked system has good structural stability and scalability, while its deformation degree still needs to be improved when the radius/length ratio of the tube units is small. Therefore, inspired by the efficient deformation mode of the Bouligand structure, perforated self-locked systems were developed by perforating a sequence of holes with Bouligand-like distribution in the sidewalls of the tube units. Simulations show that the perforated systems are not only structurally robust, but also have an efficient deformation mode. Compared to other perforated systems, the double-helix perforated system with four vertical perforations is absolutely dominant in the comprehensive evaluation of various mechanical performance indicators. In addition, experimental results showed that the double-helix perforated system can reduce the weight by 10% while increasing the specific energy absorption by 58% compared to non-perforated systems. Therefore, this multi-bionic strategy can integrate the advantages of different natural structures and provide new insights for the design of high-performance protection systems. © 2024, The Authors. All rights reserved.

关键词： Energy absorption

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