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Nano Research 2024年第4期17卷 3359-3368页

作者： junru yao Jintang Zhou Feng Yang Guiyu Peng Yijie Liu Zhengjun yao Fan Wu Haibo Zeng College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China

The development of multifunctional materials and synergistic applications of various functions are important conditions for integrated and miniaturized equipment.Here,we developed asymmetric MXene/aramid nanofibers/polyimides(AMAP)aerogels with different modules using an integrated molding process.Cleverly asymmetric modules(layered MXene/aramid nanofibers section and porous MXene/aramid nanofibers/polyimides section)interactions are beneficial for enhanced performances,resulting in low reflection electromagnetic interference(EMI)shielding(specific shielding effectiveness of 2483(dB·cm^(3))/g and a low R-value of 0.0138),high-efficiency infrared radiation(IR)stealth(ultra-low thermal conductivity of 0.045 W/(m·K)and IR emissivity of 0.32 at 3–5μm and 0.28 at 8–14μm),and excellent thermal management performances of insulated Joule heating.Furthermore,these multifunctional AMAP aerogels are suitable for various application scenarios such as personal and building protection against electromagnetic pollution and cold,as well as military equipment protection against infrared detection and EMI.

关键词： multifunctional material electromagnetic interference shielding low reflection infrared radiation stealth thermal insulation Joule heating

Magnetic nanoparticle-modified hollow double-shell SiC@C@FeCo with excellent electromagnetic wave absorption

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Nano Research 2024年第4期17卷 3164-3174页

作者： Guiyu Peng Jintang Zhou Jiaqi Tao Weize Wang Jun Liu junru yao Yijie Liu Zhengjun yao College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100China

Integrated micro and nanostructures,heterogeneous components,defects,and interfaces is the way to develop high-performance microwave absorbing materials.However,there still needs to be more precise experimental routes and effective validation.In this work,by a continuous process of vacuum sintering,hydrothermal,and carbon thermal reduction,magnetic FeCo nanoparticles were successfully embedded on the hollow double-shell mesoporous SiC@C surface,thus solving the challenges of a single component loss mechanism.The hollow double-shell nanostructure introduces air to enhance impedance matching while significantly reducing the density of the material.The extensive defects and heterogeneous grain boundaries effectively enhance the polarization loss capacity.The magnetic loss mechanism introduced by the magnetic particles effectively improves the impedance matching properties of the material.The synergy of these multiple advantages has enabled the SCFC_(2)-8(here SiC@C@FeCo is abbreviated to SCFC,2 represents the initial metal ion content,and 8 represents the hydrothermal time)sample to achieve an adequate absorption bandwidth of 6.09 GHz at 2.0 mm.With a minimum reflection loss of-60.56 dB,the absorption bandwidth can cover the entire C,X,and Ku bands by adjusting the matching thickness(1.3–4.0 mm).This work provides a valuable paradigm for the deeper exploitation of microwave absorption potential and guides the development of other high-performance materials.

关键词： SiC@C@FeCo(SCFC)composites core–shell hollow structure microwave absorption

Heterogeneous ZnO@CF structures and their excellent microwave absorbing properties with thin thickness and low filling

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Journal of Materials Science & Technology 2022年第18期113卷 166-174页

作者： Zibao Jiao Wenjun Huyan junru yao Zhengjun yao Jintang Zhou Peijiang Liu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100China

With the aim to obtain enhanced absorbing performance at small thickness and low filling,a robust strat-egy to fabricate zinc oxide(ZnO)modified carbon fiber(CF)structures have been successfully prepared by using low temperature hydrothermal method.Due to the multi-interface polarization caused by the high specific surface area of the complex heterostructures and the improvement of impedance matching,the composites show excellent electromagnetic wave absorption properties.Under the condition of low filling content(20 wt%)and ultra-thin thickness(1.5 mm),the excellent absorption performance of minimal reflection loss of−34.4 dB and an effective absorption bandwidth(RL≤−10 dB)of 4.94 GHz is achieved.In addition,the effective absorption bandwidth covers the whole 2-18 GHz band with the increase of thickness from 0.5 to 10 mm.This work provides an innovative method for designing the matching layer of carbon-based absorbing materials,and ZnO@CF heterostructure is expected to become a potential absorbing material.

关键词： Heterogeneous structure Carbon fiber Impedance matching characteristic Electromagnetic wave absorption

Achieving Ultra-Wideband and Elevated Temperature Electromagnetic Wave Absorption via Constructing Lightweight Porous Rigid Structure

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Nano-Micro Letters 2022年第11期14卷 33-47页

作者： Zibao Jiao Wenjun Huyan Feng Yang junru yao Ruiyang Tan Ping Chen Xuewei Tao Zhengjun yao Jintang Zhou Peijiang Liu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100People’s Republic of China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100People’s Republic of China School of Electronic Science and Engineering Nanjing UniversityNanjing 210023People’s Republic of China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167People’s Republic of China

Realizing ultra-wideband absorption,desirable attenuation capability at high temperature and mechanical requirements for real-life applications remains a great challenge for microwave absorbing materials.Herein,we have constructed a porous carbon fiber/polymethacrylimide(CP)structure for acquiring promising microwave absorption performance and withstanding both elevated temperature and high strength in a low density.Given the ability of porous structure to induce desirable impedance matching and multiple reflection,the absorption bandwidth of CP composite can reach ultra-wideband absorption of 14 GHz at room temperature and even cover the whole X-band at 473 K.Additionally,the presence of imide ring group in polymethacrylimide and hard bubble wall endows the composite with excellent heat and compressive behaviors.Besides,the lightweight of the CP composite with a density of only 110 mg cm^(−3) coupled with high compressive strength of 1.05 MPa even at 453 K also satisfies the requirements in engineering applica-tions.Compared with soft and compressible aerogel materials,we envision that the rigid porous foam absorbing material is particularly suitable for environmental extremes.

关键词： Porous structure EM wave absorption Mechanism

原位生长FeCo/rGo纳米复合材料的电磁波吸收性能研究

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功能材料 2024年第1期55卷 1124-1129,1157页

作者：鲁露周金堂彭贵玉姚俊儒南京航空航天大学材料科学与技术学院南京211100 南京航空航天大学面向苛刻环境的材料制备与防护技术工业和信息化部重点实验室南京211100

利用化学开发高性能吸波材料是解决电磁污染问题和实现军事装备雷达隐身的有效手段。基于化学原位生长策略,以金属离子Fe^(2+)和Co^(2+)为原料,采用一步水热法制备FeCo/rGo复合材料,并对其形貌、结构以及吸波性能进行测试和分析。结果表... 详细信息

利用化学开发高性能吸波材料是解决电磁污染问题和实现军事装备雷达隐身的有效手段。基于化学原位生长策略,以金属离子Fe^(2+)和Co^(2+)为原料,采用一步水热法制备FeCo/rGo复合材料,并对其形貌、结构以及吸波性能进行测试和分析。结果表明,当FeCo和氧化石墨烯的复合比为1∶0.5在厚度1.9 mm时有效吸收带宽达到5.5 GHz,其最小反射损耗达到-54.14 dB。复合比为1∶1时则实现了1.3 mm,4.5 GHz有效吸收带宽的吸波性能,这表明FeCo/rGo磁性材料有望成为一种极具应用价值的电磁吸波材料。

关键词：吸波性能水热法 FeCo/rGo 石墨烯电磁吸波材料

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便携式分压力质谱计校准装置的性能测试研究

真空科学与技术学报 2024年第4期44卷 306-311页

作者：姚雪琦董云宁闫睿陈俊儒丁双康朋伟卢耀文北京市真空计量检测工程技术研究中心北京100029 北京东方计量测试研究所北京100029

文章对新研制的便携式分压力质谱计校准装置的部分性能进行了测试。采用参考电离真空计测量了装置的极限真空度;对于流导值在10^(-2) m^(3)/s的圆孔型抽气流导元件,通过精确测量其直径和厚度的尺寸,采用公式计算得到分子流条件下的流导... 详细信息

文章对新研制的便携式分压力质谱计校准装置的部分性能进行了测试。采用参考电离真空计测量了装置的极限真空度;对于流导值在10^(-2) m^(3)/s的圆孔型抽气流导元件,通过精确测量其直径和厚度的尺寸,采用公式计算得到分子流条件下的流导值;对于孔径在微米量级的进气流导元件,采用定容衰减压力的方法通过实验测量确定其流导值;采用同一真空计分别测量抽气流导元件两端的气体压力获得返流比。测试研究结果表明:装置的极限真空度为4.8×10^(-7) Pa,抽气流导元件对N2的流导值为1.37×10^(-2) m^(3)/s,对N_(2)的返流比为0.193,两个进气流导元件对N_(2)的流导值分别为3.81×10^(-6) m^(3)/s、4.50×10^(-8) m^(3)/s,综合分析可得装置对N_(2)的校准范围为(4×10^(-1)~5×10^(-6))Pa。

关键词：校准装置分压力性能测试质谱计便携式

Electrostatic Interaction Tailored Anion-Rich Solvation Sheath Stabilizing High-Voltage Lithium Metal Batteries

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Nano-Micro Letters 2022年第9期14卷 147-159页

作者： junru Wu Ziyao Gao yao Wang Xu Yang Qi Liu Dong Zhou Xianshu Wang Feiyu Kang Baohua Li Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055People’s Republic of China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084People’s Republic of China College of Materials Science and Engineering Hunan UniversityChangsha 410082People’s Republic of China

Through tailoring interfacial chemistry,electrolyte engineering is a facile yet effective strategy for highperformance lithium(Li)metal batteries,where the solvation structure is critical for interfacial chemistry.Herein,the effect of electrostatic interaction on regulating an anion-rich solvation is firstly proposed.The moderate electrostatic interaction between anion and solvent promotes anion to enter the solvation sheath,inducing stable solid electrolyte interphase with fast Li+transport kinetics on the anode.This asdesigned electrolyte exhibits excellent compatibility with Li metal anode(a Li deposition/stripping Coulombic efficiency of 99.3%)and high-voltage LiCoO_(2) cathode.Consequently,the 50μm-thin Li||high-loading LiCoO_(2) cells achieve significantly improved cycling performance under stringent conditions of high voltage over 4.5 V,lean electrolyte,and wide temperature range(-20 to 60℃).This work inspires a groundbreaking strategy to manipulate the solvation structure through regulating the interactions of solvent and anion for highperformance Li metal batteries.

关键词： Electrostatic interaction Anion-rich solvation sheath High voltage Lithium metal batteries Wide temperature range

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心室辅助装置研究进展

中国医疗设备 2024年第3期39卷 160-169,180页

作者：李映涛刘瑶任俊儒沈斌郭占玲中北大学机械工程学院山西太原030051 广东省微创手术器械设计与精密制造重点实验室广东广州510006 浙江清华长三角研究院海纳精密加工中心浙江嘉兴314000

心室辅助装置(Ventricular Assist Device,VAD)主要功能是替代或者辅助心脏向主动脉供血,用于心力衰竭或者等待心脏移植的患者。随着心血管病患病率和死亡率的逐年升高,且心脏移植的不确定性较高,VAD受到越来越多的关注。本文对国内外VA... 详细信息

心室辅助装置(Ventricular Assist Device,VAD)主要功能是替代或者辅助心脏向主动脉供血,用于心力衰竭或者等待心脏移植的患者。随着心血管病患病率和死亡率的逐年升高,且心脏移植的不确定性较高,VAD受到越来越多的关注。本文对国内外VAD的研究进展进行了综述,主要对国内外发展历程及现状,装置的核心零部件及检测装置的体外模拟循环系统进行了分析,重点探讨VAD导致的并发症的类型和原因,以期为VAD未来的研究和发展指明方向。

关键词：心室辅助装置叶轮支承方式体外模拟循环系统并发症

西黄丸联合地塞米松治疗浆细胞性乳腺炎的临床研究

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现代药物与临床 2024年第6期39卷 1544-1548页

作者：尹琳琳郝俊兰赵静王俊茹王晶韩兴思郭佳艺薛立梅王兰兰姚莉芸邢台市中心医院孕产期保健科邢台市中心医院产科

目的探讨西黄丸联合地塞米松片治疗浆细胞性乳腺炎的临床疗效。方法选取2021年10月—2023年9月在邢台市中心医院接受治疗的114例浆细胞性乳腺炎患者，按随机数字表法将所有患者分为对照组和治疗，每组57例。对照组口服地塞米松片，4片... 详细信息

目的探讨西黄丸联合地塞米松片治疗浆细胞性乳腺炎的临床疗效。方法选取2021年10月—2023年9月在邢台市中心医院接受治疗的114例浆细胞性乳腺炎患者，按随机数字表法将所有患者分为对照组和治疗，每组57例。对照组口服地塞米松片，4片/次，2次/d。治疗组在对照组基础上口服西黄丸，3 g/次，2次/d。两组患者的治疗时间1个月。比较两组的临床疗效、症状消失时间、疼痛程度、超声指标和血清指标。结果治疗后，治疗组的总有效率为92.98%，高于对照组的总有效率78.95%，差异具有有统计学意义（P<0.05）。治疗后，治疗组疼痛、红肿、肿块、乳头溢液消失时间均短于对照组，差异有统计学意义（P<0.05）。治疗后，两组视觉模拟评分法（VAS）评分均显著降低（P<0.05），且治疗组的VAS评分低于对照组（P<0.05）。治疗后，两组的SR、乳腺肿块最大直径比治疗前小（P<0.05）；治疗组的应变率（SR）、乳腺肿块最大直径比对照组小（P<0.05）。治疗后，两组的血清细胞间黏附分子1(ICAM-1)、Toll样受体2(TLR2)、白细胞介素-37(IL-37)水平比治疗前低（P<0.05）；治疗组的血清ICAM-1、TLR2、IL-37水平比对照组小（P<0.05）。结论西黄丸联合地塞米松片可提高浆细胞性乳腺炎的疗效，改善临床症状，减轻患者疼痛程度，降低炎症反应和肿块大小。

关键词：西黄丸地塞米松片浆细胞性乳腺炎疼痛消失时间红肿消失时间肿块消失时间乳头溢液消失时间视觉模拟评分法评分应变率乳腺肿块最大直径血清细胞间黏附分子1 Toll样受体2 白细胞介素-37

The sensitivity of numerical simulation to vertical mixing parameterization schemes: a case study for the Yellow Sea Cold Water Mass

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Journal of Oceanology and Limnology 2021年第1期39卷 64-78页

作者： Congcong BI Zhigang yao Xianwen BAO Cong ZHANG Yang DING Xihui LIU junru GUO College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Physical Oceanography Laboratory/CIMST Ocean University of China and Qingdao National Laboratory for Marine Science and TechnologyQingdao 266100China The First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and TechnologyQingdao 266000China China National Environmental Monitoring Centre Beijing 100012China Operational Oceanography Institution Dalian Ocean UniversityDalian 116023China

The vertical mixing parameterization scheme,by providing the eff ects of some explicitly missed physical processes and more importantly closing the energy budgets,is a critical model component and therefore imposes signifi cant impacts on model performance.The Yellow Sea Cold Water Mass(YSCWM),as the most striking and unique phenomenon in the Yellow Sea during summer,is dramatically aff ected by vertical mixing process during its each stage and therefore seriously sensitive to the proper choice of parameterization scheme.In this paper,a hindcast of YSCWM in winter of 2006 was implemented by using the Regional Ocean Modeling System(ROMS).Three popular parameterization schemes,including the level 2.5 Mellor-Yamada closure(M-Y 2.5),Generic Length Scale closure(GLS)and K-Profi le Parameterization(KPP),were tested and compared with each other by conducting a series of sensitivity model experiments.The infl uence of diff erent parameterization schemes on modeling the YSCWM was then carefully examined and assessed based on these model experiments.Although reasonable thermal structure and its seasonal variation were well reproduced by all schemes,considerable diff erences could still be found among all experiments.A warmer and spatially smaller simulation of YSCWM,with very strong thermocline,appeared in M-Y 2.5 experiment,while a spatially larger YSCWM with shallow mixed layer was found in GLS and KPP schemes.Among all the experiments,the discrepancy,indicated by core temperature,appeared since spring,and grew gradually by the end of November.Additional experiments also confi rmed that the increase of background diff usivity could eff ectively weaken the YSCWM,in either strength or coverage.Surface wave,another contributor in upper layer,was found responsible for the shrinkage of YSCWM coverage.The treatment of wave eff ect as an additional turbulence production term in prognostic equation was shown to be more superior to the strategy of directly increasing diff usivity for a coastal region.

关键词： Yellow Sea Cold Water Mass(YSCWM) vertical mixing parameterizations thermocline background diff usivity surface wave induced mixing