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Inter‑Skeleton Conductive Routes Tuning Multifunctional Conductive Foam for Electromagnetic Interference Shielding,Sensing and Thermal Management

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Nano-Micro Letters 2025年第3期17卷 19-36页

作者： Xufeng Li Chunyan Chen Zhenyang Li Peng Yi Haihan Zou Gao Deng Ming Fang junzhe he Xin Sun Ronghai Yu Jianglan Shui Caofeng Pan Xiaofang Liu School of Materials Science and Engineering Beihang UniversityBeijing 100191People’s Republic of China Institute of Atomic Manufacturing Beihang UniversityBeijing 100191People’s Republic of China Tianmushan Laboratory Xixi Octagon CityYuhang DistrictHangzhou 310023People’s Republic of China Science and Technology On Electromagnetic Scattering Laboratory Beijing Institute of Environmental FeaturesBeijing 100854People’s Republic of China

Conductive polymer foam(CPF)with excellent compressibility and variable resistance has promising applications in electromagnetic interference(EMI)shielding and other integrated functions for wearable ***,its insufficient change amplitude of resistance with compressive strain generally leads to a degradation of shielding performance during ***,an innovative loading strategy of conductive materials on polymer foam is proposed to significantly increase the contact probability and contact area of conductive components under *** inter-skeleton conductive films are constructed by loading alginate-decorated magnetic liquid metal on the polymethacrylate films hanged between the foam skeleton(denoted as AMLM-PM foam).Traditional point contact between conductive skeletons under compression is upgraded to planar contact between conductive ***,the resistance change of AMLM-PM reaches four orders of magnitude under ***,the inter-skeleton conductive films can improve the mechanical strength of foam,prevent the leakage of liquid metal and increase the scattering area of EM ***-PM foam has strain-adaptive EMI shielding performance and shows compression-enhanced shielding effectiveness,solving the problem of traditional CPFs upon *** upgrade of resistance response also enables foam to achieve sensitive pressure sensing over a wide pressure range and compression-regulated Joule heating function.

关键词： Inter-skeleton conductive films Conductive polymer foam Liquid metal Electromagnetic interference shielding

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Predicting the Threshold Values based on Diffusion Model of Nitrite Ions in Reinforced Concrete

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 308-311页

作者：柳俊哲 Department of Civil Engineering Ningbo University

The prediction model for inhibition effect of reinforced concrete was presented based on the Magge＇s model when the concrete surface was brushed with nitrite solution. The influence of the amount of nitrite solution on inhibiting duration was also discussed through a simulation analysis when the amount of solution were 250 g/m^2, 500 g/m^2, 1000 g/m^2 and 1500 g/m^2, respectively. The experimental results confirm that nitrite ion can diffuse well in concrete to reach an effective mol ratio from the surface of the concrete to the surface of the reinforcement, and has an effective protection for the bars against corrosion. The higher the amount of solution, the better it will accelerate getting the threshold value of mol ratio on the surface of rebar, and retarding the time for loosing the effective threshold value of mol ratio. It helps to increase the tendency of inhibiting duration and prolong the life of reinforced concrete. The nitrite solution amount is used to predict the corrosion inhibiting duration of concrete that contains chloride salt.

关键词： reinforced concrete nitrite ion diffusion threshold value

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220kV主变压器风冷系统应急电源的应用

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内蒙古电力技术 2016年第6期34卷 74-77页

作者：房义明杨俊哲李鹤杨树兴乌海电业局内蒙古乌海016000

根据220 kV强制油循环风冷变压器风冷系统控制特点,在确保主变压器正常运行的前提下,实施风冷控制系统故障处理难度较大。对此建议在变电站站用电系统正常、主变压器风冷控制系统发生故障、主变压器冷却器全停的情况下,利用风冷系统应... 详细信息

根据220 kV强制油循环风冷变压器风冷系统控制特点,在确保主变压器正常运行的前提下,实施风冷控制系统故障处理难度较大。对此建议在变电站站用电系统正常、主变压器风冷控制系统发生故障、主变压器冷却器全停的情况下,利用风冷系统应急电源快速恢复主变压器风冷系统运行,满足在主变压器不停电的情况下,实施风冷控制系统故障处理和冷却风机检修的工作需求。结合有关变压器运行规程要求和现场实际情况,提出风冷系统应急电源的功能、结构和工艺要求,并进行了试点应用,结果表明,采用该应急电源处理故障时可以大大提高工作效率,降低人力成本。

关键词： 220 kV主变压器强制油循环风冷变压器控制回路应急风冷电源

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Ceria Nanoparticles as Enzyme Mimetics

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Chinese Journal of Chemistry 2017年第6期35卷 791-800页

作者： Guohua Wang junzhe Zhang Xiao he Zhiyong Zhang Yuliang Zhao Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Key Laboratory of Nuclear Radiation and Nuclear Energy Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China CAS Key Laboratory for Biomedical Effects ofNanomaterials & Nanosafety National Center for Nanoscience & Technology of China University of Chinese Academy of Sciences Beijing 100190 China

In the past decades, enzyme mimetics based on ceria nanoparticles （nanoceria） have been developed as potential substitutes for nature enzymes. The mixed valence states of cerium and the patterns of oxygen vacancies on crystal planes result in different enzyme mimetic activities. In this review we survey the bio-applications of nanoceria-based enzyme mimetics as well as the underlying mechanisms. Factors influencing the enzyme mimetic activities and future perspective of nanoceria-based enzyme mimetics are also addressed.

关键词： nanoceria enzyme mimetics oxygen vacancies mixed valence states

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Quantifying the dissolution of nanomaterials at the nano-bio interface

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Science China Chemistry 2015年第5期58卷 761-767页

作者： junzhe Zhang Xiao he Peng Zhang Yuhui Ma Yayun Ding Zhenyu Wang Zhiyong Zhang College of Environmental Science and Engineering Ocean University of China Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety Key Laboratory of Nuclear Radiation and Nuclear Energy Technology Institute of High Energy Physics Chinese Academy of Sciences

With the rapid development of nanoscience and nanotechnology, more engineered nanomaterials(NMs) are being released into the environment. Such releases might lead to unwanted exposure. The dissolution of NMs at nano-bio interfaces is one of the most noteworthy causes of the toxicity of dissolvable NMs. A growing number of studies are focusing assessing NMs dissolution during exposure tests. This mini review considers recent developments in the quantitative tools for the assessment of NMs dissolution, and highlights the critical points in the evaluation of the toxicity of dissolvable NMs.

关键词： nanomaterials nano-bio interface dissolution ions toxicology

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On the New Initiative for Responsible Space Behaviors Proposed by United Kingdom,United States,and Other States

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Space(Science & Technology) 2023年第1期3卷 248-255页

作者： Guoyu Wang junzhe Chen Academy of Air Space Policy and LawSchool of LawBeijing Institute of TechnologyBeijingChina

In December 2020,the Draft Resolution on Reducing Space Threats through Norms,Rules and Principles of Responsible Behaviours proposed by the United Kingdom,United States,and other States was adopted at the UN General Assembly(hereafter referred to as the“New Initiative for Responsible Space Behaviours”).Nevertheless,it does not mean that the international community would achieve the expected breakthroughs and progress on the topic of preventing an arms race in outer *** methodology of“identifying threats-characterising behaviors(responsible/irresponsible)-formulating rules”proposed by the Initiative seems reasonable;however,it might bring more unexpected uncertainties than it is supposed to *** approach could also be found in the Defense Space Strategy promulgated by the United States in *** pros and cons of this Initiative should be calmly and objectively analyzed to avoid a political deadlock in formulating rules of *** should insist on identifying the threats and risks faced by the international community as a whole rather than that by individual States and interest groups,and reexamine the dichotomy of“responsible/irresponsible behaviors,”focus on the identification and interpretation of rule of international law related to space security so as to reach a consensus on the insufficiency of lex lata and subsequently lay the foundation for the formulation of effective new rules for arms control in outer space.

关键词： outer breakthrough hereafter

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Preparation and Microstructure of Green Ceramsite Made from Sewage Sludge

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Journal of Wuhan University of Technology(Materials Science) 2012年第1期27卷 149-153页

作者： LIU junzhe LIU Rui he Zhimin BA Mingfang LI Yushun School of Civil Engineering Ningbo UniversityNingbo 315211China Department of Civil Engineering University of Colorado DenverUSA

A pilot study was conducted to produce high performance green ceramsite by using sewage sludge, fly ash and silt. According to the theory of Riley, the proportions of raw materials were chosen to perform the sintering experiments. Thereby, the optimum proportion of sludge, fly ash and silt and sintering parameters were determined. The microstructure of the optimized mixture and the leaching of heavy metal elements were also analyzed. The lab testing results show that sintering parameters have significant impact on the performance of ceramsite. For solid waste ceramsite with high loss of ignition, inadequate pre-burning process lowers the strength and increases the water absorption. Low water absorption can be achieved by the enameled surface and closed pore structure. The high performance green ceramsite has the density grade of 700, water absorption of 6% and compressive strength of 6.6 MPa. The ceramsite is mainly composed of cristobalite and mullite. The leaching of heavy metal elements from the solid waste ceramsite are lower than the limits required by the national standard. This study shows that the utilization of solid waste ceramsite as the light Weight aggregate is feasible and safe.

关键词： ceramsite sewage sludge sintering parameters microstructure

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Immobilized ZnO based nanostructures and their environmental applications

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Progress in Natural Science:Materials International 2021年第6期31卷 821-834页

作者： Wei Gaoa Yangsi Liu junzhe Dong Department of Chemical and Materials Engineering The University of Auckland Key Laboratory of Advanced Functional Materials Ministry of Education Faculty of Materials and Manufacturing Beijing University of Technology National Engineering Laboratory for Industrial Big-data Application Technology Beijing University of Technology Beijing Guyue New Materials Research Institute Beijing University of Technology

In the research of semiconductor metal oxides, zinc oxide(ZnO) nanomaterials have been committed to design and exploration because of their unique physical and chemical properties. ZnO has many structural characteristics and has considerable practical applications in the field of environmental technology. However, ZnO nanomaterials used for environmental functions are often presented in the form of powders. After use, they need to go through recovery processes such as centrifugation and filtration, which is also easy to cause secondary *** above problems can be avoided by fixing ZnO nanostructures on substrates to form easily movable ***, we present a review of our work and some others on the different synthetic strategies, formation mechanism, modification, performance and diversifications of immobilized ZnO based nanostructures, and highlight their photocatalytic related activities for environmental remediation. Various immobilized ZnO based nanostructures including nanorod arrays, 3D nanostructures, and composite heterostructures have been focused. We hope it may serve as a useful reference for researchers interested in immobilized semiconductor nanostructures and their photocatalysis and other environmental applications.

关键词： ZnO Nanostructure Immobilization Photocatalysis Environmental application

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Nitrated and parent PAHs in the surface water of Lake Taihu,China:Occurrence,distribution,source,and human health risk assessment

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Journal of Environmental Sciences 2021年第4期33卷 159-169页

作者： Jijie Kong Yuxuan Dai Mengshu Han Huan he Jiapeng Hu Junyi Zhang junzhe Shi Qiming Xian Shaogui Yang Cheng Sun The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Environment Nanjing Normal UniversityNanjing 210023China College of Ecological and Resource Engineering Fujian Provincial Key laboratory of Eco-Industrial Green TechnologyWuyi UniversityWuyishan 354300China Wuxi Environmental Monitoring Centre Wuxi 214121China

Nitrated polycyclic aromatic hydrocarbons(NPAHs)have toxic potentials that are higher than those of their corresponding parent polycyclic aromatic hydrocarbons(PAHs)and thus have received increasing attention in recent *** this study,the occurrence,distribution,source,and human health risk assessment of 15 NPAHs and 16 PAHs were investigated in the surface water from 20 sampling sites of Lake Taihu during the dry,normal,and flood seasons of *** PAH concentrations ranged from 255 to 7298 ng/L and the NPAH concentrations ranged from not-detected(ND)to 212 ng/*** the target analytes,2-nitrofluorene(2-n Flu)was the predominant NPAH,with a detection frequency ranging from 85%to 90%and a maximum concentration of 56.2 ng/*** three-ringed and four-ringed NPAHs and PAHs comprised the majority of the detected *** terms of seasonal variation,the highest levels of the NPAHs and PAHs were in the dry season and flood season,*** ratio analysis indicated that the prime source of NPAHs was direct combustion,whereas in the case of PAHs the contribution was predominantly from a mixed pattern including pollution from unburned petroleum and petroleum *** human health risk of NPAHs and PAHs was evaluated using a lifetime carcinogenic risk assessment *** carcinogenic risk level of the targets ranged from 2.09×10^(-7)to 5.75×10^(-5)and some surface water samples posed a potential health risk.

关键词： Nitrated polycyclic aromatic hydrocarbons Surface water Occurrence Seasonal variation Human health risk assessment

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First-principles study of the effects of Si doping on geometric and electronic structure of closed carbon nanotube

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Chinese Science Bulletin 2005年第17期50卷 1823-1828页

作者： ZHOU junzhe WANG Chongyu Department of Physics Tsinghua University Beijing 100084 China International Centre for Materials Physics Chinese Academy of Sciences Shenyang 110016 China

The effects of Si doping on geometric and elec-tronic structure of closed carbon nanotube (CNT) are stud-ied by, a first-principles method, DMol. It is found that the local density of states at the Fermi level (EF) increases due to the Si-doping and the non-occupied states above the EF go down toward the lower energy range under an external elec-tronic field. In addition, due to the doping of Si, a sub-tip on the CNT cap is formed, which consisted of the Si atom and its neighbor C atoms. From these results it is concluded that Si-doping is beneficial to the CNT field emission properties.

关键词：碳纳米管半导体添加剂硅元素电子结构

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