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Mechanically flexible V_(3)S_(4)@carbon composite fiber as a high-capacity and fast-charging anode for sodium-ion capacitors

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Rare Metals 2023年第8期42卷 2633-2642页

作者： Zhi-Fei Mao Xiao-Jun Shi Tao-Qiu Zhang Peng-Ju Liang Rui Wang Jun Jin Bei-Bei He Yan-Sheng Gong Qiang Wang Xi-Li Tong Huan-Wen Wang Faculty of Material Science and Chemistry China University of GeosciencesWuhan 430074China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of XPCC Department of Chemistry and Chemical EngineeringCollege of LifeTarim UniversityAlar 843300China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

Hybrid Na-ion capacitors(NICs)have received considerable interests owing to their low-cost,high-safety,and rapidly charging energy-storage *** NICs are composed of a capacitor-type cathode and a battery-type *** major challenge for NICs is to search for suitable electrode materials to overcome the sluggish diffusion of Na^(+)in the ***,ultrafine vanadium sulfide is encapsulated in carbon fiber(V_(3)S_(4)@CNF)as a self-supported electrode by electrospinning and in situ *** carbon cladding and one-dimensional(ID)nanofiber network-like structure could alleviate the volume expansion of V_(3)S_(4)during Na^(+)de-/intercalation ***,the V_(3)S_(4)@CNF anode exhibited a pseudocapacitive sodium storage in terms of large Na^(+)-storage capacity(476 mAh·g^(-1)at 0.1A·g^(-1)),high-rate capability(290 mAh·g^(-1)at 20.0 A·g^(-1))and excellent cycling stability(95%capacity retention for1500 cycles at 2.0 A·g^(-1))in Na *** employing V_(3)S_(4)@CNF as the anode and the activated carbon(AC)cathode,the as-assembled NICs could deliver a high energy density of 110 Wh·kg^(-1)at a power density of200 W·kg^(-1).Even at a high power of 10,000 W·kg^(-1),the specific energy is still up to 42 Wh·kg^(-1).

关键词： Electrospinning Na-ion capacitor(NIC) Nanofibers Vanadium sulfide Fast-charging

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Multi-walled carbon nanotubes reversing the bone formation of bone marrow stromal cells by activating M2 macrophage polarization

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Regenerative Biomaterials 2023年第1期10卷 980-989页

作者： Runlian Lin Kun Ge Dehui Fan Jing Li Guoqiang Zhou Kaihan Zhang Yuanyu Huang Lili Ma Jinchao Zhang Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education Key Laboratory of Chemical Biology of Hebei ProvinceCollege of Chemistry and Material ScienceHebei UniversityBaoding 071002China College of Basic Medical Science Hebei UniversityBaoding 071000China Department of Chemistry The University of ManchesterManchester M139PLUK School of Life Science School of Medical TechnologyAdvanced Research Institute of Multidisciplinary ScienceKey Laboratory of Molecular Medicine and BiotherapyKey Laboratory of Medical Molecule Science and Pharmaceutics EngineeringBeijing Institute of TechnologyBeijing 100081China

Multi-walled carbon nanotubes(MWCNTs)are an excellent bone tissue repair material both in vitro and in *** interactions between MWCNTs and single type of cells of bone tissue,including osteoblasts,bone marrow stromal cells(BMSCs)or osteoclasts,have been extensively ***,the interactions between MWCNTs with different types of cells in the bone microenvironment remain *** microenvironment is a complex system composed of different types of cells,which have interactions between each *** this work,the effects of MWCNTs on bone microenvironment were firstly studied by culture of MWCNTs with BMSCs,osteoblasts,osteoclasts,macrophages and vascular endothelial cells,***,co-culture systems of macrophages-BMSCs,macrophages-calvaria and macrophages-BMSCs-vascular endothelial cells were treated with MWCNTs,*** osteogenic differentiation of BMSCs and osteoblasts was inhibited when these two types of cells were cultured with MWCNTs,***,when co-culture MWCNTs with BMSCs and macrophages,the osteogenesis of BMSCs was promoted by inducing the M2 polymerization of ***,MWCNTs promoted the bone formation in the osteolysis model of calvaria ex *** addition,the formation of osteoclasts was inhibited,and angiogenesis was increased when treated with *** study revealed the inconsistent effects of MWCNTs on single type of bone cells and on the bone *** results provided basic research data for the application of MWCNTs in bone tissue repair.

关键词： multi-walled carbon nanotubes bone microenvironments osteogenesis bone marrow stromal cells M2 macrophages cellular interactions

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Design and simulation of a combined flue gas and steam bagasse dryer to increase boiler efficiency of a sugar factory 2

Design and simulation of a combined flue gas and steam bagas...

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2nd International Conference on Future Technologies in Manufacturing, Automation, Design and Energy

作者： Kebede Nemomsa, Sololo Dessalegn Dejene, Naol Gopal, Mahesh Shunki Tibba, Getachew Tamiru Negari, Dinkisa Department of Mechanical Engineering College of Engineering and Technology Wollega University Post Box. No. 395 Nekemte Ethiopia Department of Mechanical Engineering and Material Science Faculty of Science and Technology University of Stavanger Stavanger Norway College of Electrical and Mechanical Engineering Addis Ababa Science and Technology University Addis Ababa Ethiopia

ISBN: (纸本)9789819912902

Bagasse is a sugar industry residue used to generate high-pressure steam that can be utilized to generate electricity. The moisture content of bagasse is a serious issue that lowers boiler efficiency. The study conducted in Arjo Diddesa sugar factory, its moisture level of the bagasse is above 52%, which impacts boiler efficiency. In this plant uses traditional SHRD technique, this uses waste flue gas to decrease moisture content. To reduce heat losses, steam is directed through the inner tube, while bagasse and flue gas are directed through the outer rotating cylinder, leading in interaction between indirect steam and direct flue gas-bagasse. ANSYS software is used for the development of drier and optimization by considering the input parameters for the SHRD are: flue gas mass flow rate, bagasse temperature, flow Pressure of flue gas. The SHRD system is tilted to the horizontal at an angle of 4° and rotates at a speed of 4.6 rpm to aid in transporting wet bagasse. The moisture in the bagasse is dropped from 52 percent to 45 percent, and increase in efficiency of a boiler from 71.5 percent to 74.5 percent theoretically. The initial GCV and NCV with 52% moisture content are 9137.6 kJ/kg and 7129.4 kJ/kg. After drying, the 45% of moisture content, the GCV and NCV of bagasse are 10484.8 kJ/kg and 8549.8 kJ/kg, respectively. The findings of the comparison show that the CV was raised by 1500 kJ/kg. © 2023 Elsevier Ltd. All rights reserved.

关键词： Flue gases

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The prospects of natural fiber composites: A brief review

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International Journal of Lightweight materials and Manufacture 2024年第4期7卷 496-506页

作者： Palanisamy, Sivasubramanian Vijayananth, Kavimani Murugesan, Thulasi Mani Palaniappan, Murugesan Santulli, Carlo Department of Mechanical Engineering PTR College of Engineering and Technology Austinpatti Madurai – Tirumangalam Road Tamil Nadu Madurai625008. India Centre for Material Science Department of Mechanical Engineering Karpagam Academy of Higher Education Tamil Nadu Coimbatore641 021 India Department of Mechanical and Aerospace Engineering Carleton University 1125 Colonel By Drive OttawaONK1S 5B6 Canada Department of Mechanical Engineering College of Engineering Imam Mohammad Ibn Saud Islamic University Riyadh Saudi Arabia School of Science and Technology Università di Camerino Camerino Italy

This research explores natural fiber composites (NFCs) as alternatives to traditional materials such as fiberglass. By examining fibers like abaca, bamboo, banana, coir, flax, hemp, jute, kenaf, pineapple leaf (PALF), sisal, and others, we emphasize their lower weight, cost-effectiveness, competitive mechanical properties, commendable specific strength, and potential for biodegradability. NFCs offer practical and eco-friendly substitutes for conventional composite fibers in industries like construction, automotive, and packaging. The article provides a brief overview of NFCs, covering their chemical, physical, and mechanical characteristics, and highlights diverse applications. The comparative analysis underscores the potential of natural fibers as sustainable choices in various industries. © 2024 The Authors

关键词： Hemp

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A review on adhesion behavior of chip seal pavement and aggregate

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Journal of Traffic and Transportation engineering(English Edition) 2024年第3期11卷 441-466页

作者： Yuming Zhou Zhuyi Peng Jinyu Wang Jianguo Wei Hao Liu Di Wang Jinming Li Key Laboratory of Road Structure and Material of Ministry of Transport(Changsha) Changsha University of Science and TechnologyChangsha 410114China School of Traffic and Transportation Engineering Changsha University of Science and TechnologyChangsha 410114China Wuhan Huike Testing Co. Ltd.Wuhan 430000China Department of Civil Engineering University of OttawaON KIN 6N5Canada CCCC Infrastructure Maintenance Group Co. Ltd.Beijing 100102China

Chip seal is widely used for preventive maintenance to mitigate pavement deterioration,but it is prone to aggregate loss during pavement *** further promote the development and application of chip seals in road engineering in China,the research progress of the adhesion behavior of aggregate and binder in chip seals was reviewed in this paper,focusing on the adhesion mechanism of emulsified asphalt and alkaline *** Influencing factors and evaluation methodology of chip seals'aggregate adhesion behavior were also *** results demonstrate that the adhesion process between emulsified asphalt and alkaline aggregate is divided into three processes including infiltration,demulsification,and cluster,which is more complicated when compared to hot *** designing a chip seal,not only the characteristics of single material should be paid attention to,but also the combination of binder and aggregate matters a *** form good adhesion between aggregate and asphalt binder,various influencing factors such as material selection,design method,and construction technical index should be considered comprehensively in the whole design,construction,and operation *** methods for evaluating adhesion behavior are summarized,including macroscopic adhesion performance tests,image analysis technology,and model *** is not objective to evaluate the aggregate adhesion behavior of chip seal only by a single evaluation method.A comprehensive evaluation based on the micro-macro multi-scale method should be considered in the future.

关键词： Chip seal Adhesion behavior Asphalt binder Aggregate

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Brightening of dark excitons in WS2 via tensile strain-induced excitonic valley convergence

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Physical Review B 2024年第8期110卷 L081405-L081405页

作者： Tamaghna Chowdhury Sagnik Chatterjee Dibyasankar Das Ivan Timokhin Pablo Díaz Núñez Gokul M. A. Suman Chatterjee Kausik Majumdar Prasenjit Ghosh Artem Mishchenko Atikur Rahman Department of Physics and Astronomy Department of Physics Department of Condensed Matter Physics and Material Science National Graphene Institute Department of Electrical Communication Engineering Department of Chemistry

Transition-metal dichalcogenides (TMDs) host tightly bound electron-hole pairs—excitons—which can be either optically bright or dark based on spin and momentum selection rules. In tungsten-based TMDs, a momentum-forbidden dark exciton is the energy ground state, and therefore, it strongly affects the emission properties. In this work, we brighten the momentum-forbidden dark exciton by placing monolayer tungsten disulfide on top of nanotextured substrates, which imparts tensile strain, modifying its electronic band structure. This enables phonon-assisted exciton scattering between momentum valleys, thereby brightening momentum-forbidden dark excitons. In addition to offering a tuning knob for light-matter interactions in two-dimensional materials, our results pave the way for designing ultrasensitive strain-sensing devices based on TMDs.

关键词： Excitons Monolayer films Transition metal dichalcogenides Density functional calculations Photoluminescence Raman spectroscopy

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Transferable,highly crystalline covellite membrane for multifunctional thermoelectric systems

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InfoMat 2024年第11期6卷 66-80页

作者： Myungwoo Choi Geonhee Lee Yea-Lee Lee Hyejeong Lee Jin-Hoon Yang Hanhwi Jang Hyeonseok Han MinSoung Kang Seonggwang Yoo A-Rang Jang Yong Suk Oh Inkyu Park Min-Wook Oh Hosun Shin Seokwoo Jeon Jeong-O Lee Donghwi Cho Department of Materials Science and Engineering Korea UniversitySeoulRepublic of Korea Thin Film Materials Research Center Korea Research Institute of Chemical TechnologyDaejeonRepublic of Korea Chemical Data-Driven Research Center Korea Research Institute of Chemical TechnologyDaejeonRepublic of Korea Division of Chemical and Material Metrology Korea Research Institute of Standards and ScienceDaejeonRepublic of Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeonRepublic of Korea Therapeutics&Biotechnology Division Drug Discovery Platform Research CenterKorea Research Institute of Chemical TechnologyDaejeonRepublic of Korea Querry Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIllinoisUSA Division of Electrical Electronic and Control EngineeringKongju National UniversityCheonanRepublic of Korea Department of Mechanical Engineering Changwon National UniversityChangwonRepublic of Korea Department of Materials Science and Engineering Hanbat National UniversityDaejeonRepublic of Korea Advanced Materials and Chemical Engineering University of Science and TechnologyDaejeonRepublic of Korea

Emerging freestanding membrane technologies,especially using inorganic thermoelectric materials,demonstrate the potential for advanced thermoelectric ***,using rare and toxic elements during material processing must be ***,we present a scalable method for synthesizing highly crystalline CuS membranes for thermoelectric *** sulfurizing crystalline Cu,we produce a highly percolated and easily transferable network of submicron CuS *** CuS membrane effectively separates thermal and electrical properties to achieve a power factor of 0.50 mW m^(-1) K^(-2) and thermal conductivity of 0.37 W m^(-1) K^(-1) at 650 K(estimated value).This yields a record-high dimensionless figure-of-merit of 0.91 at 650 K(estimated value)for ***,integrating 12 CuS devices into a module resulted in a power generation of4μW atΔT of 40 K despite using a straightforward configuration with only p-type ***,based on the temperature-dependent electrical characteristics of CuS,we develop a wearable temperature sensor with antibacterial properties.

关键词： copper sulfide flexible thermoelectric generator multifunctional thermoelectric systems sulfurization thermoelectric membrane

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Mechanical and Rheological Properties of Bamboo Pulp Fiber Reinforced High Density Polyethylene Composites:Influence of Nano CaCO_(3)Treatment and Manufacturing Process with Different Pressure Ratings

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Journal of Renewable materials 2022年第7期10卷 1829-1844页

作者： Cuicui Wang Xin Wei Lee MSmith Ge Wang Shuangbao Zhang Haitao Cheng International Centre for Bamboo and Rattan Beijing100102China Department of Mechanical and Energy Engineering University of North TexasDenton76203USA Beijing Key Laboratory of Wood Science&Engineering College of Material Science&TechnologyBeijing Forestry UniversityBeijing100083China

In order to investigate the effect of the relative motion of nano CaCO_(3)reinforced bamboo pulp fiber(BPF)/HDPE composite components on the mechanical performance,a comparative study was *** was treated by nano CaCO_(3)blending(BM)and impregnation modification(IM)*** composites were produced using hot press(HPMP),extrusion(EMP)and injection molding process(IMP).The physical morphology of BPF was similar at different manufacturing *** to the samples manufactured by HPMP,a decrease in the(specific)flexural strength of BPF/HDPE composites and an increase in those of composites treated by nano CaCO_(3)manufactured by EMP and IMP were *** injection molded composites exhibited the best values in the(specific)impact strength,(specific)tensile *** had a greater effect on the rheological behavior of the composites than BM,and nano CaCO_(3)treatment most effectively affected the performance of the extrusion molded composites.

关键词： Nano CaCO_(3) bamboo pulp fiber composites manufacturing process mechanical properties rheological properties

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Modification of a Bottom Ash Based Insulation material Using Saw Dust, EPS and Aggregate Chips 11th

Modification of a Bottom Ash Based Insulation Material Using...

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11th International Conference on Sustainable Built Environment, ICSBE 2020

作者： Kahandawa Arachchi, K.A.D.Y.T. Gamage, J.C.P.H. de Silva, G.I.P. Department of Civil Engineering University of Moratuwa Moratuwa Sri Lanka Department of Material Science and Engineering University of Moratuwa Moratuwa Sri Lanka

ISBN: (纸本)9789811644115

Bottom ash shows moderate properties of thermal resistivity when incorporated with conventional cement-sand plasters. This paper investigates the possibility of incorporating other commonly used insulation materials to develop a superior blend as cementitious insulation. Recycled EPS, sawdust, and aggregate chips were blended with a developed bottom ash based mix proportion and mechanical properties of the mortar were analyzed. Compressive strength, workability, and thermal conductivity were tested. The results indicated a 26% increment in thermal performance when EPS was introduced and a 33% increment when sawdust was introduced. On the contrary, their strengths reduced drastically. The aggregate chips had an inverse effect where thermal conductivity increased along with the strength. However, the compressive strength increased up to 75%. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Aggregates

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Structure-function integrated magnesium alloys and their composites

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Journal of Magnesium and Alloys 2023年第10期11卷 3511-3544页

作者： Junbin Hou Ding Li Zejia Liu Zhikang Ji Shoufu Guan Chongchao Li Xiaoguang Qiao Igor S.Golovin Mingyi Zheng School of Material Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Physical Metallurgy of Non-Ferrous Metals National Research Technological University“MISiS”Leninskiy pr.4Moscow 119049Russia Moscow Polytechnic University B.Semenovskay 38Moscow 107023Russia

Magnesium-based materials not only exhibit desirable characteristics such as low density and high specific strength, but also possess exceptional functional properties, including high damping capacity, high thermal conductivity, high electromagnetic interference shielding capacity, flame retardancy, and dissolvability. However, achieving a balance between strength and functional properties remains a significant challenge in Mg alloys community. Typically, strength depends on the pinning effect of defects, such as solute atoms and second phases,which hinder dislocation motion. On the other hand, optimal functional properties usually necessitate relative perfect crystal structures, as the presence of solute atoms and second phases can have adverse effects on damping capacity and thermal conductivity. Balancing these conflicting requirements is difficult. The trade-off between strength and functional properties of the Mg alloys should be broken to meet the urgent need in aerospace, automotive, 3C(computers, communications, and consumer electronics) and energy industries for high performance structural-functional integrated Mg-based materials. This review summarizes recent progress in understanding the mechanisms and influencing factors for the functional properties of Mg alloys. The mechanisms underlying the trade-off between strength and functional properties of Mg alloys is discussed. The latest developed structural-functional integrated Mg alloys and their composites are summarized, including high strength Mg-based materials with high damping capacity/high thermal conductivity/strong electromagnetic shielding capability/excellent flame-resistance/high dissolution rate. The future works of developing structure-function integrated Mg-based materials are proposed.

关键词： Structure-function integrated Mg alloys Composites Strength Damping capacity Thermal conductivity Electromagnetic interference shielding Ignition resistance Dissolvability

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