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multifunctional Nacre-Like Nanocomposite Papers for Electromagnetic interference Shielding via Heterocyclic Aramid/mXene Template-Assisted <i>in-Situi> Polypyrrole Assembly

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NANO-miCRO LETTERS 2025年第1期17卷 1-18页

作者： xiong, Jinhua Zhao, Xu Liu, Zonglin Chen, He Yan, Qian Lian, Huanxin Chen, Yunxiang Peng, Qingyu He, Xiaodong Harbin inst Technol Ctr Composite Mat & Struct Natl Key Lab Sci & Technol Adv Composites Special Harbin 150080 Peoples R China

The large-scale, high-strength, super-tough, and multifunctional nacre-like heterocyclic aramid (HA)/mXene@polypyrrole (PPy) (HmP) nanocomposite papers were fabricated using the in-situ assembly of PPy onto the HA/mXene hydrogel *** "brick-and-mortar" layered structure and abundant hydrogen-bonding interactions among mXene, PPy, and HA respond cooperatively to external stress and effectively increase the mechanical properties of HmP nanocomposite *** templating effect from HA/mXene was utilized to guide the assembly of conducting polymers, leading to high electrical conductivity and outstanding electromagnetic interference shielding performance. Robust, ultra-flexible, and multifunctional mXene-based electromagnetic interference (Emi) shielding nanocomposite films exhibit enormous potential for applications in artificial intelligence, wireless telecommunication, and portable/wearable electronic equipment. in this work, a nacre-inspired multifunctional heterocyclic aramid (HA)/mXene@polypyrrole (PPy) (HmP) nanocomposite paper with large-scale, high strength, super toughness, and excellent tolerance to complex conditions is fabricated through the strategy of HA/mXene hydrogel template-assisted in-situ assembly of PPy. Benefiting from the "brick-and-mortar" layered structure and the strong hydrogen-bonding interactions among mXene, HA, and PPy, the paper exhibits remarkable mechanical performances, including high tensile strength (309.7 mPa), outstanding toughness (57.6 mJ m-3), exceptional foldability, and structural stability against ultrasonication. By using the template effect of HA/mXene to guide the assembly of conductive polymers, the synthesized paper obtains excellent electronic conductivity. more importantly, the highly continuous conductive path enables the nanocomposite paper to achieve a splendid Emi shielding effectiveness (Emi SE) of 54.1 dB at an ultra-thin thickness (25.4 mu m) and a high specific Emi SE of 17,204.7 dB cm2 g-1. in addit

关键词： mXene Remarkable mechanical properties Heterocyclic aramid Electromagnetic interference shielding Polypyrrole multifunctionality

Scaffold-regulation buffered moS_(2)anode kinetics for high-performance Na-/K-ion storage

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Journal of materials Science & Technology 2023年第14期145卷 14-24页

作者： Tuzhi xiong Xincheng Yao David Adekoya Hao yang m-Sadeeq Balogun College of materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082China Centre for Clean Environment and Energy Griffith School of EnvironmentGold Coast CampusGriffith UniversityQLD4222Australia Guangxi Key Laboratory of Electrochemical Energy materials School of Chemistry&Chemical EngineeringGuangxi UniversityNanning 530004China

Designing a highly conductive scaffold with unique function has great significance in elevating the stor-age properties of molybdenum sulfide(moS_(2))for sodium-and potassium.ion ***,we show that forming a three-dimensional(3D)highly conductive dual backbone that consists of titanium nitride nanowires(TiN)coated on 3D carbon fiber(CF)could suppress the poor conductivity of moS_(2).Theo-retical calculations predict that both TiN and CF boost the electronic conductivity,while the moS_(2)will promote high ionic adsorption owing to the suitable adsorption *** as-prepared CF@TiN/moS_(2),with mass loading up to 12.5 mg cm^(−2),achieves a high areal capacity of up to 5.40 mAh cm^(−2)under the current density of 0.6 mA cm^(−2)for sodium *** excellent performance of the hybrid can be attributed to buffer and conductivity enhancer features,allowing Na-ion to directly have contact with the CF@TiN/moS_(2)hybrid.A series of electrochemical analyses including cyclic voltammetry and symmetric cell analyses affirm the significant improvement in transport *** importantly,the CF@TiN/moS_(2)also achieves a high areal capacity of 3.29 mAh cm^(−2)under the current density of 0.3 mA cm^(−2)as anode material for potassium.ion batteries(PiBs),demonstrating that the scaffold-regulated strategy is a feasible strategy to enhance the kinetics of moS_(2)-based anodes for secondary-ion batteries and beyond.

关键词： moS_(2)nanosheets Flexible conductive TiN nanowires Kinetics High areal capacity Sodium-and potassium.ion batteries

multi-scale modelling of gas flow in nanoscale pore space with fractures

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Journal of Rock mechanics and Geotechnical Engineering 2020年第1期12卷 32-40页

作者： Qingrong xiong Diansen yang Weizhong Chen Research Centre for Radwaste&Decom.issioning and modelling&Simulation Centre Dalton Nuclear InstituteUniversity of ManchesterManchesterM139PLUK School of mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

in this work,a multi-scale pore network with fractures is developed against experimental data in a wide range of degrees of water *** pore network is constructed based on the measured microstructure information at several length *** gas transport is predicted by different gas transport equations(***,dusty gas model(DGm),Civan and Klinkenberg),which can consider the fundamental physics mechanisms in tight porous media,such as Knudsen diffusion and viscous ***,the model is applied to simulating the gas permeability of the Callovo-Oxfordian(COx)*** predicted gas permeability is basically in good agreement with the experimental data under different degrees of water *** the effects of micro-fissures are *** results suggest that this model can predict the gas flow in other tight porous media as well and can be applied to other fields such as carbon capture and storage.

关键词： Pore network Nanopores Apparent gas permeability Callovo-Oxfordian(COx)claystone

Subthermocline eddies carrying the indonesian Throughflow water observed in the southeastern tropical indian Ocean

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Acta Oceanologica Sinica 2023年第5期42卷 1-13页

作者： Guangbing yang Quanan Zheng Xuejun xiong First institute of Oceanography and Key Laboratory of Marine Science and Numerical ModelingMinistry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical modeling Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Shandong Key Laboratory of marine Science and Numerical modeling Qingdao 266061China Department of Atmospheric and Oceanic Science University of MarylandCollege Park 20742USA

We observed a subthermocline eddy(STE)with a cold and fresh core during an observation cruise along a transect of 10°S in the southeastern tropical indian Ocean(SETiO)in December *** vertical scale,speed radius,and maximum swirl velocity of the STE were about 200 m,55 km,and 0.5 m/s,*** mean Rossby number and Burger number of the STE were then estimated to be about−0.7 and 2.4,indicating the STE was a submesoscale coherent *** STE core water had characteristics of the indonesian Throughflow(iTF)water and was distinct from that of surrounding *** examining Argo float data,another STE was well captured by five successive profiles of the same Argo *** STEs showed significant temperature and salinity anomalies at theσ0=26.0-26.5 kg/m3 *** the assumption that the low-salinity iTF water parcels could be carried only by surface eddies and the STEs,the Argo profiles,which detected low-salinity iTF water and were located outside a surface eddy,were believed to be inside an STE and were used to analyze the distribution,origin,and generation mechanism of the *** results suggested that the STEs carrying iTF water may be generated under topography-current interaction at the eastern coastal waters or under front-induced subduction in the area away from coastal *** STEs may be widely distributed in the SETiO and may play a role in iTF water parcel transport.

关键词： subthermocline eddy southeastern tropical indian Ocean indonesian Throughflow submesoscale coherent vortex

A Posteriori Error Estimates of a Com.ined mixed Finite Element and Discontinuous Galerkin method for a Kind of Compressible miscible Displacement Problems

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Advances in Applied mathematics and mechanics 2013年第2期5卷 163-179页

作者： Jiming yang Zhiguang xiong College of Science Hunan Institute of EngineeringXiangtan 411104HunanChina School of mathematics and Computational Science Hunan University of Science and TechnologyXiangtan 411201HunanChina

Akind of compressiblemiscible displacement problemswhich includemolecular diffusion and dispersion in porous media are *** mixed finite element method is applied to the flow equation,and the transport one is solved by the symmetric interior penalty discontinuous Galerkin *** on a duality argument,employing projection estimates and approximation properties,a posteriori residual-type hp error estimates for the coupled system are presented,which is often used for guiding *** with the error analysis carried out by yang(***,65(7)(2011),pp.781-797),the current work is more complicated and challenging.

关键词： A posteriori error discontinuous Galerkin method compressible miscible displacement mixed finite element duality argument

Separation and comprehensive utilization of valuable elements in Ti-bearing electric arc furnace molten slag

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Journal of iron and Steel Research international 2018年第5期25卷 487-496页

作者： yang Li Hai-yang Yu Hua-m.i yang Feng Zheng xiong Zhang Bei-bei xiong Qiang Zhen Hong-wei Ni The State Key Laboratory of Refractories and metallurgy School of Materials and Metallurgy Wuhan University ofScience and Technology Wuhan 430081 Hubei China School of metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China Nano-science and Nano-technology Research Center Materials Science and Engineering College ShanghaiUniversity Shanghai 200444 China

A novel route to comprehensive utilization of valuable elements such as Ti, A1, Si and mg in Ti-bearing electric arc furnace molten slag （Ti-bearing EAF slag） was proposed. The route can be expressed as a three-step process including alkali fusion, water leaching and acidolysis. Following these processes under the optimum conditions, the recovery ratios of TiO2, Al2O3, SiO2 and mgO were about 97.5, 93.5, 27.9 and 53.5%, respectively. meanwhile, nanostructured TiO2, NaA zeolite and mg（OH）2 fire retardant were synthesized simultaneously by using Ti-bearing EAF slag as raw materials. in addition, the photocatalytic activity of prepared nanostructured TiO2 and the adsorption property of obtained NaA zeolite were investigated. The results showed that the photodegradation efficiency of as-prepared TiO2 was 80% for rhodamine B and the adsorption efficiency of NaA zeolite was 61% for Cu2＋ under the optimum conditions.

关键词： Ti-bearing electric arc furnace molten slag - Comprehensive utilization Valuable element TiO2 photocatalyst ·NaA zeolite mg(OH)2 fire retardant

Clinical and microbiological Characteristics of Patients with Complicated intra-abdominal infections in intensive Care Unit

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Current medical Science 2020年第1期40卷 104-109页

作者： yang-m.i xiong Xin RAO Department of intensive Care Unit Zhongnan Hospital of Wuhan UniversityWuhan 430071China

in order to investigate the clinical and microbiological characteristics of patients with complicated intra-abdominal infections(ciAis)in intensive care unit(iCU),the clinical data of 612 ciAis patients from January 2016 to December 2018 were retrospectively *** characteristics,distribution of pathogens and drug resistance were statistically *** was found that patients with community-acquired intra-abdominal infections(CA-iAis)made up a majority of ciAis *** positive rate of abdominal drainage fluid culture was 55.56%.Gramnegative bacteria accounted for the majority,the most commonly isolated bacteria of which were Escherichia coli(20.96%),Klebsiella pneumoniae(10.20%)and Pseudomonas aeruginosa(5.57%).The most commonly isolated gram-positive bacteria were Enterococcus(16.88%)and methicillinresistant staphylococcus aureus(mRSA,3.90%).Enterobacter isolates showed high resistance rate to most cephalosporins and low resistance rate to piperacillin/tazobactam and *** spectrum beta-lactamase(ESBL)screen positive isolates from CA-iAis patients showed an increasing trend in past three *** and mRSA showed high resistance rate to clindamycin,quinolone,erythromycin and tetracycline,while they showed high sensitivity rate to linezolid,tegacycline,teicoplanin and *** results indicate that isolated bacteria from abdominal drainage fluid show high resistance rates to commonly used antibiotics in iCU patients with *** curative effects on diseases should be monitored continuously when antibiotics are ***,we should always keep eyes on drug-resistant bacteria,especially when the treatment efficacy is not good.

关键词： complicated intra-abdominal infection pathogens extended spectrum beta-lactamase screen positive isolates resistance rate

Propagation dynamics and experimental observation of quadratic vortex beam

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Chinese Physics B 2012年第2期21卷 286-291页

作者： Chen Zi-yang Pu Ji-xiong College of information Science&Engineering Institute of Optics&PhotonicsHuaqiao UniversityXiamen 361021China

The concept of a quadratic vortex beam.is proposed, in which phase term of the beam.is given by exp（i mθ2）. The phase of the quadratic vortex beam.increases with azimuthal angle nonlinearly. This change in phase produces several unexpected effects. Unlike the circularly symmetric beam spot of normal vortex beams, the intensity distribution of the quadratic vortex beam.is shown to be asymmetric. The phase singularities will shift in the transverse beam plane on propagation.

关键词： vortex beam phase singularity propagation dynamics

Accurate modelling of the crush behaviour of thin tubular columns using material point method

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Science China(Physics,mechanics & Astronomy) 2013年第6期56卷 1209-1219页

作者： yang PengFei mEGUiD S.A. ZHANG xiong School of Aerospace Tsinghua University mechanics and Aerospace Design Laboratory University of TorontoTorontoONM5S 3G8Canada

in this paper,we apply the material point method(mPm),also known as a meshfree method,to examine the crush behaviour of thin tubular *** the finite element method,randomly-distributed-weak-particle triggers were used to account for the deformation behaviour of collapse *** symmetric and asymmetric modes of deformation and their associated mean collapse loads are determined for an elasto-plastic constitutive law describing the tubular *** was devoted to the accuracy and the convergence of the mPm simulation,which is determined by the number of the particles and the size of the background cells used in our explicit ***,a novel contact approach was adopted to establish the crush behaviour of the tubular *** aspects of the work were accordingly examined,including three different crush velocities(5,10 and 15 m/s) and varied geometrical features of the tube(t/d and l/d) based on the deformation *** results of our model,which were compared with existing analytical predictions and experimental findings,identify the critical geometric features of the tubular columns that would dictate the deformation mode as being either progressive collapse or following Euler's buckling mode.

关键词： thin tubular columns crush material point method deforam.iom mode elasto-plastic mean collapse load