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Self-Powered,Long-Durable,and Highly Selective Oil-Solid Triboelectric Nanogenerator for Energy Harvesting and Intelligent Monitoring

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Nano-Micro Letters 2022年第10期14卷 95-107页

作者： Jun Zhao Di Wang Fan Zhang jinshan pan Per Claesson Roland Larsson Yijun Shi Division of Machine Elements Department of Engineering Sciences and MathematicsLuleåUniversity of Technology97187 LuleåSweden Department of Engineering and Design School of Engineering and InformaticsUniversity of SussexBrighton BN19RHUK Division of Surface and Corrosion Science Department of ChemistryKTH Royal Institute of Technology10044 StockholmSweden

Triboelectric nanogenerators(TENGs)have potential to achieve energy harvesting and condition monitoring of oils,the“lifeblood”of industry.However,oil absorption on the solid surfaces is a great challenge for oil-solid TENG(O-TENG).Here,oleophobic/superamphiphobic O-TENGs are achieved via engineering of solid surface wetting properties.The designed O-TENG can generate an excellent electricity(with a charge density of 9.1μC m^(−2) and a power density of 1.23 mW m^(−2)),which is an order of magnitude higher than other O-TENGs made from polytetrafluoroethylene and polyimide.It also has a significant durability(30,000 cycles)and can power a digital thermometer for self-powered sensor applications.Further,a superhigh-sensitivity O-TENG monitoring system is successfully developed for real-time detecting particle/water contaminants in oils.The O-TENG can detect particle contaminants at least down to 0.01 wt%and water contaminants down to 100 ppm,which are much better than previous online monitoring methods(particle>0.1 wt%;water>1000 ppm).More interesting,the developed O-TENG can also distinguish water from other contaminants,which means the developed O-TENG has a highly water-selective performance.This work provides an ideal strategy for enhancing the output and durability of TENGs for oil-solid contact and opens new intelligent pathways for oil-solid energy harvesting and oil condition monitoring.

关键词： Oil Triboelectric nanogenerator Energy harvesting Intelligent monitoring

Passivation characteristics of ultra-thin 316L foil in NaCl solutions

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Journal of Materials Science & Technology 2022年第32期127卷 192-205页

作者： Xiaoqi Yue Zhile Yang Luyao Huang Lei Zhang Jun Li Zhaozhan Xue jinshan pan Institute of Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China Division of Surface and Corrosion Science KTH Royal Institute of TechnologyStockholm SE-10044Sweden Shunde Graduate School University of Science and Technology BeijingFoshan 528399China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Beijing 102209China Shanxi Taigang Stainless Steel Co. Ltd.Taiyuan 030003China

Electrochemical behaviour and passive film characteristics of an ultra-thin 316 L foil with a thickness of20μm in 3.5 wt.%NaCl solution were investigated using multiple techniques,focusing on the effect of microstructure,the applied potential,and the pH of the solution.The microstructure contains mainly fine grains(~4μm)with high-angle boundaries and preferential orientation of(220),and no MnS inclusion was detected.The electrochemical measurements show a significantly higher breakdown potential and lower passive current density for the 316 L foil than traditional wrought 316 L.The surface analyses using angle-resolved X-ray photoelectron spectroscopy(ARXPS)and time-of-flight secondary ion mass spectroscopy(TOF-SIMS)reveal that,compared to the wrought material,both the inner and out parts of the passive film on the 316 L foil are more enriched in Cr-and Mo-oxides.The microstructure favourable for elemental diffusion and the absence of MnS inclusion facilitate the formation of a continuous compact Cr-and Mo-rich passive film,which effectively retards corrosion in NaCl solution and remains stable in acidic solution(pH 2)or at high polarised potential up to 600 mV vs Ag/AgCl.

关键词： Ultra-thin 316L foil Passive film Pitting corrosion XPS TOF-SIMS

Corrosion mechanism of CuAl-NiC abradable seal coating system——The influence of porosity,multiphase,and multilayer structure on the corrosion failure

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Journal of Materials Science & Technology 2021年第29期88卷 258-269页

作者： Yumeng Ni Fan Zhang Demian I.Njoku Yingjie Yu jinshan pan Meijiang Meng Ying Li Corrosion and Protection Division Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Material Science and Technology University of Science and Technology of ChinaShenyang110016China Department of Engineering and Design School of Engineering and InformaticsUniversity of SussexBrightonBN19RHUnited Kingdom Division of Surface and Corrosion Science KTH Royal Institute of TechnologyDrottning Kristinas väg.51SE-10044StockholmSweden Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang110819China

In this study,the corrosion behavior of the CuAl-NiC abradable seal coating system in chloride solution was investigated to systematically research the effect of porosity,multiphase,and multilayer structure on the corrosion failure.Through the composition and structure analysis,the corrosion process of the system was predicted and then verified with mercury intrusion porosimetry,cross-section SEM/EDS analysis,and electrochemical measurements.The results demonstrated that the interphase selective corrosion caused the porosity of the top layer to decrease first and then increase during the corrosion development.The interlayer galvanic corrosion,determined by the pore connectivity,is crucial for corrosion failure.

关键词： Abradable seal coating system Galvanic corrosion Multilayer Porosity

高温环境下弹簧功能-传感共形位移测量装置及方法

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兵工学报 2024年第2期45卷 662-670页

作者：宁克焱曾强田金山赵攀兰海何家富万丽中国北方车辆研究所先进越野系统技术全国重点实验室北京100072 重庆大学机械传动国家重点实验室重庆400044 63966部队北京100072

机械装备的位移测量是状态检测和运动控制的关键,基于激光、电涡流、电感和电阻等原理的常规位移测量方法无法应对高端装备紧凑测试空间和高温、油污等恶劣环境条件下的位移测量挑战。基于材料力学与弹簧结构,构建一种新的弹簧功能-传... 详细信息

机械装备的位移测量是状态检测和运动控制的关键,基于激光、电涡流、电感和电阻等原理的常规位移测量方法无法应对高端装备紧凑测试空间和高温、油污等恶劣环境条件下的位移测量挑战。基于材料力学与弹簧结构,构建一种新的弹簧功能-传感共形的位移测量模型,对弹簧整体受力及位移进行分析,确定位移-应变映射关系;基于有限元方法建立弹簧的应变-位移模型,分析弹簧位移测量的敏感点、不同组桥形式、位移激励频率等因素影响;通过搭建电液伺服高频冲击试验台,在扫频和加热工况下进行弹簧位移测量装置及方法的有效性和动态性能测试。试验结果表明:加载频率在100 Hz及以下时测试精度可达0.06 mm,高温适应性不低于275℃;经车用干片式制动器高温制动试验应用验证,在工作温度160℃以上仍能实时稳定获取机构的动态位移信号,为高温制动器状态检测及其故障诊断提供了嵌入式测试技术支撑;该共形位移测量方法在高温条件下具有良好的线性度和精度,为紧凑空间及高温等恶劣环境下位移测量提供了一种有效方法,尤其是在具有弹簧等弹性元件的情况下能够实现对原系统无影响的嵌入式测试。

关键词：弹簧位移测量应变高温制动

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基于天窗基本单元的编组站天窗方案优化研究

铁道运输与经济 2024年第4期46卷 1-8,18页

作者：廖延婷陈钉均邓洪波耿敬春潘金山西南交通大学交通运输与物流学院四川成都610031 西南交通大学综合交通运输智能化国家地方联合工程实验室四川成都610031 西南交通大学综合交通大数据应用技术国家工程实验室四川成都610031 中国铁路成都局集团有限公司调度所四川成都610082 中国铁路经济规划研究院有限公司线路站场咨询部北京100844

编组站接发列车方向多、数量大,机车换挂和调车作业频繁,直接影响施工维修作业。既有固定天窗时长的天窗方案,难以兼顾维修施工作业和运输工作连续性需求,导致天窗兑现率低,增加安全隐患,研究提出基于天窗基本单元的编组站天窗方案优化... 详细信息

编组站接发列车方向多、数量大,机车换挂和调车作业频繁,直接影响施工维修作业。既有固定天窗时长的天窗方案,难以兼顾维修施工作业和运输工作连续性需求,导致天窗兑现率低,增加安全隐患,研究提出基于天窗基本单元的编组站天窗方案优化方法。根据各维修养护工种作业特性、编组站工作人员数量及效率等因素,划分天窗基本单元;考虑编组站维修养护与运输组织需求,以效用、作业完成率和天窗阈值利用率最优为目标,以时序关系为约束,建立基于阈值的天窗方案多目标优化模型,并利用数学软件进行求解;以成都北编组站为例,验证模型的有效性,结果表明,通过合理优化天窗方案,天窗兑现率达100%,有助于缓解编组站维修与运输之间的冲突。

关键词：铁路运输天窗优化策略综合天窗编组站天窗基本单元

Enhanced strength and ductility in a powder metallurgy Ti material by the oxygen scavenger of CaB_(6)

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Journal of Materials Science & Technology 2023年第6期137卷 132-142页

作者： Yu pan jinshan Zhang Jianzhuo Sun Yanjun Liu Ce Zhang Rui Li Fan Kuang Xinxin Wu Xin Lu Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Engineering TechnologyNational Engineering Research Center for Advanced Rolling TechnologyUniversity of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China

The challenge of producing a high-ductility titanium(Ti)material using inexpensive high-oxygen hydride-dehydride(HDH)Ti powder is hereby addressed by the incorporation of CaB_(6)oxygen-scavenger.The oxygen-scavenging behavior,microstructure evolution,mechanical behavior and improvement mechanism were systematically investigated.A continuous TiO_(2)oxide layer with a thickness of approximately 9.3 nm is presented on the HDH Ti powder surface.The oxide layer will dissolve into Ti matrix during sintering,making the increase of c/a value and leading to the Ti-Ti bonds developing from plastic metal bonds to-ward brittle covalent bonds.The CaB_(6)addition can scavenge O impurity and make a significant increase in tensile ductility forα-Ti matrix.A small addition of 0.2 wt.%CaB_(6)provides a superior tensile elongation of 22.2%for Ti material,almost three times as high as that of pure Ti(7.5%).The increase of defor-mation twining activity and grain refinement are responsible for the improved ductility.Furthermore,the CaB_(6)oxygen-scavenger can react with the surface oxide layer to in-situ form rod-like TiB and granular CaTiO_(3)reinforcements,refining the coarse near equiaxed grain ofα-Ti matrix into fine equiaxed crys-tals.The multiple mechanisms of grain-boundary strengthening,load-bearing strengthening of TiB and Orowan strengthening of CaTiO_(3)nanoparticles work together to increase the tensile strength of Ti/CaB_(6)composites.This work offers an effective method to fabricate high-performance Ti material using inex-pensive high-oxygen HDH Ti powder.

关键词： Titanium Powder metallurgy Sintering Oxygen Mechanical properties

Nanophase precipitation and strengthening in a dual-phase Al_(0.5)CoCrFeNi high-entropy alloy

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Journal of Materials Science & Technology 2021年第13期72卷 1-7页

作者： Haoxue Yang jinshan Li Xiangyu pan William Yi Wang Hongchao Kou Jun Wang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

Precipitation-hardening in fcc-based high-entro py alloys(HEAs)have usually been realized by introducing complex intermetallic compounds.In this study,enhanced strength is ascribed to the existence of L1_(2) precipitates and B2/bcc conjoint phases in the fcc matrix.The nano-size particles in the Al_(0.5)CoCrFeNi HEA are produced by cold-rolling,followed by intermediate-temperature-annealing at 650℃.For L1_(2) ordering,the initial granular structure has transformed into lamella structure and then kept stable when the holding time prolonged to 200 h.The formation of this conjoint B2/bcc driven by the concentration profiles takes place when the diffusion process of elements is sufficient after long-time aging.Based on the microstructure analysis,changes in mechanical properties are associated with the shape,size scale and volume fraction of the precipitates.The peak ultimate tensile stress reaches 1221.5 MPa,1.97 times compared with the as-cast alloy,remaining plasticity of 21.3%.

关键词： High-entropy alloy L12 phase B2 phase Precipitation strengthening

Natural selection maintains the transcribed LTR retrotransposons in Nosema bombycis

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Journal of Genetics and Genomics 2010年第5期37卷 305-314页

作者： Heng Xiang Guoqing pan Ruizhi Zhang jinshan Xu Tian Li Wenle Li Zeyang Zhou Zhonghuai Xiang Institute of Sericulture and Systems Biology Southwest University Beibei Chongqing 400715 China College of Life Science Chongqing Normal University Chongqing 400047 China Biotechnology Research Center Southwest University Beibei Chongqing 400715 China

Eight intact LTR retrotransposons （Nbr1-Nbr8） have been previously characterized from the genome of Nosema bombycis, a eu- karyotic parasite with a compact and reduced genome. Here we describe six novel transcribed Nbr elements （Nbr9-Nbr14） identified through either cDNA library or RT-PCR. Like previously determined ones, all of them belong to the Ty3/Gypsy superfamily. Retrotransposon diversity and incomplete domains with insertions （Nbr12）, deletions （Nbrll） and in-frame stop codons in coding regions （Nbr9） were detected, suggesting that both defective and loss events of LTR retrotransposon have happened in N. bornbycis genome. Analysis of selection showed that strong purifying selection acts on all elements except Nbr11. This implies that selective pressure keeps both these Nbrs and their functions in genome. Interestingly, Nbrll is under positive selection and some positively selected codons were identified, indicating that new functionality might have evolved in the Nbrll retrotransposon. Unlike other transposable elements, Nbrll has integrated into a conserved syntenic block and probably resulted in the inversion of both flanking regions. This demonstrates that transposable element is an important factor for the reshuffling and evolution of their host genomes, and may be maintained under natural selection.

关键词： microsporidia LTR retrotransposon transcribed purifying selection positive selection

Chemical screen identifies shikonin as a broad DNA damage response inhibitor that enhances chemotherapy through inhibiting ATM and ATR

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Acta Pharmaceutica Sinica B 2022年第3期12卷 1339-1350页

作者： Fangfang Wang Sora Jin Franklin Mayca Pozo Danmei Tian Xiyang Tang Yi Dai Xinsheng Yao jinshan Tang Youwei Zhang Institute of Traditional Chinese Medicine and Natural Products College of PharmacyJinan UniversityGuangzhou 510632China Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drug Research Jinan UniversityGuangzhou 510632China Department of Pharmacology Case Comprehensive Cancer CenterCase Western Reserve University School of MedicineClevelandOH 44106USA

DNA damage response(DDR)is a highly conserved genome surveillance mechanism that preserves cell viability in the presence of chemotherapeutic drugs.Hence,small molecules that inhibit DDR are expected to enhance the anti-cancer effect of chemotherapy.Through a recent chemical library screen,we identified shikonin as an inhibitor that strongly suppressed DDR activated by various chemotherapeutic drugs in cancer cell lines derived from different origins.Mechanistically,shikonin inhibited the activation of ataxia telangiectasia mutated(ATM),and to a lesser degree ATM and RAD3-related(ATR),two master upstream regulators of the DDR signal,through inducing degradation of ATM and ATR-interacting protein(ATRIP),an obligate associating protein of ATR,respectively.As a result of DDR inhibition,shikonin enhanced the anti-cancer effect of chemotherapeutic drugs in both cell cultures and in mouse models.While degradation of ATRIP is proteasome dependent,that of ATM depends on caspase-and lysosome-,but not proteasome.Overexpression of ATM significantly mitigated DDR inhibition and cell death induced by shikonin and chemotherapeutic drugs.These novel findings reveal shikonin as a pan DDR inhibitor and identify ATM as a primary factor in determining the chemo sensitizing effect of shikonin.Our data may facilitate the development of shikonin and its derivatives as potential chemotherapy sensitizers through inducing ATM degradation.

关键词： Chemical screen Shikonin DNA damage Response ATM ATR ATRIP Protein degradation Chemo sensitizing