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SSRN 2024年

作者： Zheng, Yaxu Wang, Kun Yang, Qin Lin, Yu Zhu, Liguang Wu, Xiaoyan Han, Baochen Wang, Bo Zhang, Di Feng, Jie Cao, Ruifang School of Material Science and Engineering Hebei Short Process Steel Making Technology Innovation Center Hebei Key Laboratory of Material Near-Net Forming Technology Hebei University of Science and Technology Shijiazhuang050018 China QuesTek Innovations EvanstonIL United States College of Materials Science and Engineering Chongqing University Chongqing400045 China Rolling Operation Department Beijing Shougang Co. LTD. Tangshan064404 China

The microstructure evolution and carbides precipitation behavior during the hot rolling, cold rolling and annealing processes have been studied. The results indicates that the addition of Nb into Ti bearing IF steel promotes the recrystallization at 900 ℃ and obtains fine recrystallized grains. Based on the fine and uniform original structure, Nb-Ti microalloyed steel obtains fine structure after cold rolling and annealing. The study results of the carbides precipitation behavior suggests that the TiN precipitates at high temperature above 1100 ℃, and a large amount of (Nb,Ti)C and TiC precipitate at about 900 ℃ in Nb-Ti and Ti bearing steels, respectively. There is no significantly difference between the amount of carbides in hot deformed steels at 900 ℃ and the hot rolled plates, which indicates that the carbides mainly precipitate during the hot rolling process due to the ultra low carbon and nitrogen content in the steel. However, there is few carbides precipitate during the coiling process at 600 ℃. The thermodynamic and kinetic calculation results are consistent with the TEM observation results. In Nb-Ti containing steel, the solid solution of Nb and Ti elements are significantly reduced due to the large amount precipitation of (Nb,Ti)C during the final rolling process, which effectively promotes the recrystallization of austenite. Therefore, the grains of hot-rolled, cold-rolled, and annealed strips are refined, and the fine-grained strengthening effect is improved. Finally, the strength of Nb-Ti containing steel is higher than that of Ti containing steel. © 2024, The Authors. All rights reserved.

关键词： Microalloying

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Enhancing Lithium Recycling Efficiency in Pyrometallurgical processing through Thermodynamic-Based Optimization and Design of Spent Lithium-Ion Battery Slag Compositions

ACS Sustainable Resource Management

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ACS Sustainable Resource Management 2024年第6期1卷 1170-1184页

作者： Haojie Li Hao Qiu Marko Ranneberg Hugo Lucas Torsten Graupner Bernd Friedrich Bengi Yagmurlu Daniel Goldmann Jens Bremer Michael Fischlschweiger Chair of Technical Thermodynamics and Energy Efficient Material Treatment Institute of Energy Process Engineering and Fuel Technology Clausthal University of Technology Agricolastraße 4 38678 Clausthal-Zellerfeld Germany Department of Mineral and Waste Processing Institute of Mineral and Waste Processing Clausthal University of Technology Walther-Nernst-Str. 9 38678 Clausthal-Zellerfeld Germany Federal Institute for Geosciences and Natural Resources (BGR) Stilleweg 2 30655 Hannover Germany Institute of Process Metallurgy and Metal Recycling (IME) RWTH Aachen University Intzestr. 3 52056 Aachen Germany Institute of Chemical and Electrochemical Process Engineering Clausthal University of Technology Leibnizstr. 17 38678 Clausthal-Zellerfeld Germany

The increasing demand for lithium in lithium-ion battery (LIB) applications necessitates innovative recycling strategies. Combined pyrometallurgical–hydrometallurgical recycling has gained increased attention for lithium recovery from slags. One challenge in the technological advancement of recycling lithium from spent LIBs with lithium-nickel-manganese-cobalt-oxide cathodes (NMC), characterized by a Li–Al–Si–Ca–Mn–O slag system, lies in the distribution of lithium across multiple silicate and oxide phases. Hence, the goal of this work is to significantly enrich the lithium in the single target phase γ-LiAlO2with thermodynamic-based optimization for tailored slag designs. This is achieved by coupling a sophisticated thermodynamic database and model reassessment related to practical NMC-type LIB slag system composition fields with Pareto optimization. Extensive experimental investigations are performed for model and design validations, and procedures for selecting the best phase candidates with individual lithium content are systematically presented. A strong nonlinear influence of CaO on the formation of the target product γ-LiAlO2could be revealed, where the addition of SiO2for lithium slagging needs to be limited to enrich lithium in the target phase. Higher amounts of added CaO and SiO2, such as both at 30 wt %, result in the undesired transfer of lithium into other Li-containing phases. Based on this approach, an artificial slag is computationally designed for the first time, where theoretically 100% of the lithium is trapped in γ-LiAlO2. After production of this slag and experimental analysis, it was found that 96% of lithium was transferred into γ-LiAlO2. This demonstrates the great potential of thermodynamics-based artificial slag design for enhancing lithium recycling efficiency in LIB recycling *** investigation presents a path for lithium enrichment in the target phase γ-LiAlO2via thermodynamic-based optimization and demonstrates the potential o

关键词： Chemical composition Lithium Show More

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Evolution of microstructure of aluminum alloy hollow shaft in cross wedge rolling without mandrel

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Journal of Central South University 2022年第3期29卷 807-820页

作者： YU Zi-ming PENG Wen-fei ZHANG Xiao OLEKSANDR Moliar TITOV Viacheslav Faculty of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Zhejiang Provincial Key Laboratory of Part Rolling Technology Ningbo UniversityNingbo 315211China The Department of Mechanics of Material Plasticity and Resource-Saving Process National Technical University of UkraineKyiv 03056Ukraine

During the process of cross wedge rolling of aluminum alloy hollow shaft, the evolution of its microstructure has an important influence on the mechanical properties of the rolled piece. In order to obtain the microstructure evolution law of aluminum alloy hollow shaft in cross wedge rolling without mandrel, a finite element model is constructed through the finite element software Deform-3D. The influences of rolling temperature, sectional shrinkage,spreading angle and forming angle on the average grain size of rolled piece are studied by numerical simulation of microstructure evolution. The cellular automata method reveals the inherent relationship between the process parameters and the evolution of the microstructure, and provides a reference for optimizing the rolling process parameters of aluminum alloy hollow shafts and improving the forming quality. The results show that the average grain size of the rolled piece increases with the increase of the rolling temperature, decreases with the increase of the sectional shrinkage,and decreases first and then increases with the increase of the spreading angle, and changes little with the increase of the forming angle.

关键词： cross wedge rolling without mandrel hollow shaft cellular automata rolling parameters microstructure evolution

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Stimuli responsive co-delivery of celecoxib and BMP2 from micro-scaffold for periodontal disease treatment

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Journal of materials Science & technology 2021年第16期75卷 216-224页

作者： Yi Hao Ran Tian Kaige Lv Zhongning Liu Jing Ni Pingyun Yuan Yongkang Bai Xin Chen Department of Prosthodontics Shanghai Ninth People's Hospital College of StomatologyShanghai Jiao Tong University School of MedicineNational Clinical Research Center of StomatologyShanghai Key Laboratory of Stomatology and Shanghai Research Institute of StomatologyShanghai 200240China Department of Chemical Engineering Shaanxi Key Laboratory of Energy Chemical Process IntensificationInstitute of Polymer Science in Chemical EngineeringSchool of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China Department of Prosthodontics Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing100081China

Controlling inflammation meanwhile facilitating tissue regeneration has been considered as a promising strategy to treat inflammatory bone defect. Herein, we describe the synthesis of a bio-sensitive poly(lactic-co-glycolic acid)/mesoporous silica nanocarriers core-shell porous microsphere(PLGA/MSNsPMS) encapsulated poly(L-lactic acid)(PLLA) spongy nanofibrous micro-scaffold as a new generation of therapeutic platform for effective reconstruction of bone defects caused by periodontal *** PLGA/MSNs-PMS were designed as stimuli-responsive carriers for on-demand co-delivery of multiple biomolecules to provide proper physiological environment, while the multi-level(from macro-,micro-to nanometers) nanofibrous and porous structures in PLLA micro-scaffold were in charge of the reconstruction of ECM, which synergistically contribute to the enhancement of new tissue formation under inflammatory condition. After local injection into periodontal tissue, this construct could sequentially release bone growth factor(BMP-2) as well as anti-inflammatory drug(celecoxib) loaded MSNs in response to the over-expressed matrix metalloproteinases(MMP) in periodontal region. During alveolar bone regeneration induced by BMP-2 and ECM like structure, the MSNs would further deliver celecoxib in target cells to achieve inflammation inhibition, resulting in effective treatment of periodontal disease.

关键词： periodontal inflammation treatment

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Effects of Oil Heat Treatment on Poplar Wood Properties: A Pilot Scale Study

SSRN

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SSRN 2024年

作者： Haseli, Maryam Efhamisisi, Davood Abdulkhani, Ali Oladi, Reza Ungerer, Bernhard Al-Musawi, Hajir Halmschlager, Erhard Müller, Ulrich Department of Wood and Paper Sciences and Technology Natural Resources Faculty College of Agriculture and Natural Resources University of Tehran Karaj Iran Department of Material Science and Process Engineering Institute of Wood Technology and Renewable Materials Konrad Lorenz-Strasse 24 Tulln an der Donau A-3430 Austria University of Natural Resources and Life Sciences Vienna Austria

Pilot-scale oil heat treatment was conducted to enhance the quality of poplar wood obtained from a fast-growing plantation. Three target temperatures, namely 180 ˚C, 190 ˚C, and 200 ˚C, were chosen for the oil heat treatment process. Clear, small specimens were cut from the lumber, following the prescribed standards for assessing wood quality. Light microscopy revealed the ruptures and deformation of the wood cell wall as the treatment temperature increased. The volumetric swelling of the treated specimen decreased proportionally with the increase in treatment temperature. The impact of oil heat treatment on the mechanical properties of wood varied depending on the specific type of mechanical strength and processing temperature. The modulus of rupture, fracture toughness, and hardness of the treated specimens drastically decreased at 200˚C. However, the specimens treated at 200˚C exhibited much lower mass loss during the fugal decay test. The results of the analytical test showed an increase in the crystalline cellulose content and thermal stability of the treated wood, due to the thermal degradation of hemicelluloses and amorphous regions of cellulose. Overall, it is concluded that oil heat treatment of poplar wood in the optimal temperature is an efficient approach to upgrade its quality with minimal reduction in mechanical strength. © 2024, The Authors. All rights reserved.

关键词： Soybean oil

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A novel metal hydride reactor design: The effect of using copper, AlN and AlSi10Mg composite fins on the dehydrogenation process of LaNi5-Metal alloy

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International Journal of Hydrogen Energy 2025年 141卷 118-132页

作者： Chibani, Atef Boucetta, Chahrazed Haddad, Mohammed Amin Nassim Boukhari, Ali Fourar, Issam Merouani, Slimane Badji, Riad Adjel, Samir Belkhiria, Sihem Boukraa, Moustafa Bougriou, Cherif Research Center in Industrial Technologies CRTI P.O.Box 64 Cheraga Algiers16014 Algeria Faculty of Exact Sciences and Sciences of Nature and Life Department of Material Sciences University of Larbi Ben M'hidi Oum El Bouaghi04000 Algeria LMSEA Mechanical Engineering Department National Polytechnic School of Constantine Constantine25000 Algeria UDERZA Unit Faculty of Technology University of El Oued El Oued39000 Algeria Laboratory of Environmental Process Engineering Department of Chemical Engineering Faculty of Process Engineering University Salah Boubnider Constantine 3 P.O. Box 72 Constantine25000 Algeria University of Monastir Faculty of Sciences Laboratory of Thermal and Energetic Systems Studies LR99ES31 Monastir5019 Tunisia Mechanical Engineering Department Faculty of Technology University of Mostefa Ben Boulaid Batna 2 Batna05000 Algeria

The optimal design of solid-state hydrogen storage devices is crucial for their effectiveness. This study investigates the thermal management of LaNi5-based metal hydride reactors for solid-state hydrogen storage by incorporating various fin materials: copper, aluminum nitride (AlN), and Aluminum Silicon Magnesium (AlSi10Mg). Utilizing ANSYS FLUENT 15.0 for simulations within a 2D numerical model, User-Defined Functions (UDFs) were employed to access the dehydrogenation process over a half-hour period. The reactor is subjected to an initial temperature of 363 K and heating oil is introduced at a speed of 1 m/s pressures ranging from 1 to 2 bar. The impact of different fin materials on enhancing the reactor's desorption properties was evaluated through key metrics such as hydrogen concentration, forced convection heat transfer coefficient, and average reactor temperature. Results demonstrate a remarkable improvement in hydrogen desorption rates, where copper fins achieve up to 67.6 % reduction in time to reach equilibrium at 1 bar compared to the reactor without fins. Similarly, AlN and AlSi10Mg fins exhibit a 64 % and 62 % reduction, respectively, highlighting their contributions to improved reactor performance. This research contributes to the advancement of hydrogen storage technologies by offering insights into the selection of fin materials and design for efficient. © 2025 Hydrogen Energy Publications LLC

关键词： Forced convection

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Analysis of composite fuselage structure under axial impact loading

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Procedia Structural Integrity 2024年 59卷 230-237页

作者： Ilham Bagus Wiranto Sherly Octavia Saraswati Aditya Rio Prabowo Iqbal Reza Al Fikri Chairunnisa Teguh Muttaqie Muhammad Ilham Adhynugraha Fadli Cahya Megawanto Arif Hidayat Abid Paripurna Fuadi Aryandi Marta Fajar Ari Wandono Abian Nurrohmad Research Center for Process and Manufacturing Industry Technology BRIN Tangerang 15314 Indonesia Department of Mechanical Engineering Universitas Sebelas Maret Surakarta 57126 Indonesia Research Center for Energy Conversion and Conservation BRIN Tangerang 15314 Indonesia Research Center for Testing Technology and Standards BRIN Tangerang 15314 Indonesia Research Center for Aeronautics Technology BRIN Bogor 16350 Indonesia Research Center for Advanced Material BRIN Tangerang 15314 Indonesia Research Center for Hydrodynamics Technology BRIN Surabaya 60117 Indonesia

This study presents the drop mass impact test behavior of a composite stiffened panel using finite element analysis (FEA). The composite panel was a representation of an unmanned aerial vehicle (UAV) fuselage structure, which was simplified and modelled as a stiffened crossbar panel. The panel and stiffener have thicknesses of 2 mm and 3 mm, respectively. Both of those parts were modeled as a woven carbon/epoxy composite. A hemispherical impactor with a diameter of 70 mm was used to study the impact behavior of a composite skin panel. The FEA was performed using a dynamic explicit solver in ABAQUS 6.23. At the beginning of the study, the mesh convergence study was conducted to choose the proper mesh for the main analysis. In addition, the numerical benchmark has also been investigated in this study. The main analysis was performed by varying impact velocities (4.43, 6.26, and 7.67 m/s) and impact mass (50, 100, and 150 kg). Finally, the impact behavior of the composite panel will be discussed thoroughly.

关键词： Composite stiffened panel impact loading Finite Element Analysis

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Halogen atom-induced local asymmetric electron in covalent organic frameworks boosts photosynthesis of hydrogen peroxide from water and air

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Matter 2025年第5期8卷

作者： Liu, Youxing Guo, Yaru Sathishkumar, Nadaraj Liu, Minghui Li, Lu Sang, Zhiyuan Feng, Rongjuan Sun, Zongqiang Sun, Chenglong Luo, Mingchuan Deng, Xuliang Lu, Gang Guo, Shaojun School of Materials Science and Engineering Peking University Beijing100871 China Beijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical Technology Beijing100029 China Department of Geriatric Dentistry NMPA Key Laboratory for Dental Materials National Engineering Laboratory for Digital and Material Technology of Stomatology Beijing Laboratory of Biomedical Materials Peking University School and Hospital of Stomatology Beijing100081 China Department of Physics and Astronomy California State University NorthridgeCA91330 United States Institute of Chemistry Chinese Academy of Sciences Beijing100049 China

The solar-to-chemical conversion (SCC) efficiency of hydrogen peroxide (H2O2) photosynthesis is governed by the O2 adsorption model and energy level, which are experimentally challenging to be tuned. Herein, we report a new strategy for tuning of the O2 adsorption and electron potential energy level of covalent organic frameworks (COFs) using halogen atom (F, Cl, Br, and I) as a regulatory reagent, and demonstrate that I-COFs exhibit the maximum thermodynamic driving force for 2e– oxygen reduction reaction (ORR). The introduction of I atom inhibits the O–O bond breakage for enhancing the selectivity of 2e– ORR from 56.5% to 87.0%, thus promoting the continuous natural sunlight-driven photosynthesis of H2O2 directly from water and air, showing a high SCC efficiency of 1.88% and the operational stability of over 200 h. Meanwhile, I-COFs also show 100% antibacterial performance and efficient wound healing ability, which is significantly better than that of H-COFs with symmetric electron distribution. © 2025 Elsevier Inc.

关键词： Electrolytic reduction

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Nanocellulose-Based Adhesives for Sustainable Wood-Polymer Composites:Recent Advancement and Future Perspective

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Journal of Renewable materials 2025年第4期13卷 773-798页

作者： Amelia Hariry Efri Mardawati Apri Heri Iswanto Tati Karliati Lukmanul Hakim Zaini Muhammad Adly Rahandi Lubis Department of Agro-Industrial Technology Universitas PadjadjaranBandung45363Indonesia Reseach Collaboration Center for Biomass and Biorefinery BRIN and Universitas PadjadjaranBandung45363Indonesia Department of Forest Product Technology Faculty of ForestryUniversitas Sumatera UtaraMedan20355Indonesia School of Life Sciences and Technology Institut Teknologi BandungBandung40132Indonesia Department of Forest Products Faculty of Forestry and EnvironmentIPB UniversityBogor16680Indonesia Institute of Wood Technology and Renewable Materials Department of Material Sciences and Process EngineeringUniversity of Natural Resources and Life SciencesVienna3430Austria Research Center for Biomass and Bioproducts National Research and Innovation AgencyCibinong16911Indonesia

Nanocellulose-based adhesives are gaining attention as a viable alternative to conventional adhesives,offering benefits such as cost-effectiveness and scalability,which make them suitable for various sectors,including cosmetics,pharmaceuticals,biodegradable products,and as reinforcing agents in natural *** review delves into the current advancements in nanocellulose-based adhesive solutions for sustainable and eco-friendly wood composites,using systematic review methods and bibliometric *** were collected from the Scopus database,spanning from 2007 to 2024,and visualized using VOSviewer to highlight emerging trends in the *** analysis revealed that nanocellulose shows great potential as a reinforcing component for traditional adhesives used in wood products such as phenol-formaldehyde(PF),urea-formaldehyde(UF),polymeric diphenylmethane diisocyanate(pMDI),and melamine-urea ***,derived from the most abundant biopolymer,cellulose,has been utilized in its nanoscale form for adhesive *** review emphasizes the advancements in using cellulose nanocrystals(CNC)and cellulose nanofibrils(CNF)to develop sustainable *** explores both the challenges and future prospects for large-scale production and application of nanocellulose-based adhesives.

关键词： Bio-adhesives nanocellulose cellulose nanocrystals wood-based composites

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Unraveling the Dynamic Redox Behavior of Pd Species in Pdox/Sno2 Hybrids: A Key to Superior Low-Temperature Gas Sensing

SSRN

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SSRN 2024年

作者： Gao, Jian Li, Mengmeng Jin, Shuge Guo, Meiyuan Jiang, Suyu Ma, Wei Song, Chunshan National Key Laboratory of Coking Coal Green Process Research Zhengzhou University Zhengzhou450001 China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical Engineering Zhengzhou University Zhengzhou450001 China Department of Chemistry Faculty of Science The Chinese University of Hong Kong Shatin Hong Kong Dalian University of Technology China

Operando characterization techniques reveal the dynamic interplay of Pd species and gas sensing activity in a PdOx/SnO2 hybrid material for low-temperature CO detection. We demonstrated that Pd species exhibited a dynamic redox behavior, transitioning between various oxidation states and serving as active sites for CO adsorption and subsequent spillover-mediated oxidation. The formation of a p-n junction at the PdOx/SnO2 interface drove oxygen anion (O2-, O-) enrichment around Pd islands, enhancing CO adsorption and facilitating rapid CO2 formation. This resulted in electron injection into the SnO2 depletion layer, leading to a significant enhancement of the sensing response even at temperatures as low as 50°C. Our findings provided profound insights into the dynamic behavior of Pd species and its influence on gas sensing performance, offering a valuable strategy for designing advanced low-temperature CO sensors with enhanced sensitivity, selectivity, and operational stability. © 2024, The Authors. All rights reserved.

关键词： Chemical sensors

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