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The effects of heat treatment on microstructure and mechanical properties of rheocasting ADC12 aluminum alloy

materials Today: Proceedings 2018年第3期5卷 9476-9482页

作者： Rungsinee Canyook Ruethairat Utakrut Chanakarn Wongnichakorn Kittichai Fakpan Saowalak Kongiang Department of Materials and Production Technology Engineering Faculty of Engineering King Mongkut’s University of Technology North Bangkok 1518 Pracharat I Rd. Wongsawang Bangsue Bangkok 10800 Thailand Material and Process Engineering Technology Faculty of Engineering and Technology King Mongkut’s University of Technology North Bangkok (Rayong Campus) 19 Tumbon Nonglalok Amphur Bankhai Rayong 21120 Thailand

The effects of heat treatment on microstructure and mechanical properties of rheocasting ADC12 aluminium alloy produced by gas induced semi-solid (GISS) technique were studied. The solution heat treatment performed at the temperature of 520°C under various solution treatment times for 2, 4, 6, 8, 10, and 12 h and followed by water quenching at room temperature. The results show that the optimum solution heat treatment condition for the non-dendritic structure of ADC12 aluminium alloy was 520°C for 8 h. The age hardening was also carried out at 170°C for different aging times of 6, 8, and 10 h, respectively. It was found that the artificial aging at 170°C for 6 h was sufficient to achieve the highest hardness of 73.2 HRB. This was due to the appropriate refinement of acicular eutectic structure.

关键词： ADC12 aluminium alloy T6 heat treatment Gas induced semi-solid (GISS) Squeeze casting Rheocasting

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Separation of mixture containing maximum boiling azeotrope with extractive heterogeneous-azeotropic distillation

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Chemical engineering Transactions 2018年 69卷 571-576页

作者： Toth, Andras Jozsef Szilagyi, Botond Haaz, Eniko Solti, Szabolcs Nagy, Tibor Tarjani, Ariella Janka Valentinyi, Nora Mizsey, Peter Environmental and Process Engineering Research Group Department of Chemical and Environmental Process Engineering Budapest University of Technology and Economics Budafoki Street 8 BudapestH-1111 Hungary Szelence Kamionmoso Ipartelep SzabadegyhazaH-2431 Hungary Institute of Chemistry Faculty of Material Science and Engineering Department of Fine Chemicals and Environmental Technology University of Miskolc Egyetemvaros C/1 108 MiskolcH-3515 Hungary

ISBN: (纸本)9788895608662

Separation of highly non-ideal mixtures with the use of extractive heterogeneous-azeotropic distillation (EHAD) has been successful in the last few years. In contrasts, most researches have focused on mixtures with containing minimal boiling homoazeotropes. Despite the fact that maximum boiling azeotropes are fewer in numbers it is important to examine if the use of EHAD method is viable. It is important to note that the EHAD method does not exclude maximum boiling azeotropes despite the fact that these types of azeotropes can not be heterogeneous. In the fine chemical industry, large amounts of used solvent have to be disposed, in many cases with incineration. Because of the high cost it is advisable to concentrate and dehydrate of the liquid wastes. The work is motivated by an industrial environmental problem, which is concentration and dehydration of used, waste solvent contains maximal boiling azeotrope in one step with EHAD. The separation of highly non-ideal Water-Acetone-Chloroform-Methanol quaternary mixture is investigated and optimized in professional flowsheet environment. The aim is to reach as clear as possible bottom product in water compound in order to few distillate product has to be burned. Two slightly different constructions of separations are examined. It can be concluded the computer simulations and experimental verification are proved the separation efficiency of EHAD in first case of maximal boiling azeotrope mixture. © Copyright 2018, AIDIC Servizi S.r.l.

关键词： Chlorine compounds

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Amidation‐Dominated Re‐Assembly Strategy for Single‐Atom Design/Nano‐engineering: Constructing Ni/S/C Nanotubes with Fast and Stable K‐Storage

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Angewandte Chemie 2020年第16期132卷

作者： Zheng Yi Song Jiang Jie Tian Yong Qian Shimou Chen Shiqiang Wei Ning Lin Yitai Qian Department of Applied Chemistry Hefei National Laboratory for Physical Science at Micro-scale University of Science and Technology of China Hefei Anhui 230026 P. R. China Experimental Center of Engineering and Material Science University of Science and Technology of China Hefei Anhui 230026 P. R. China Beijing Key Laboratory of Ionic Liquid Clean Process CAS Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 P. R. China

An amidation‐dominated re‐assembly strategy is developed to prepare uniform single atom Ni/S/C nanotubes. In this re‐assembly process, a single‐atom design and nano‐structured engineering are realized simultaneously. Both the NiO 5 single‐atom active centers and nanotube framework endow the Ni/S/C ternary composite with accelerated reaction kinetics for potassium‐ion storage. Theoretical calculations and electrochemical studies prove that the atomically dispersed Ni could enhance the convention kinetics and decrease the decomposition energy barrier of the chemically‐absorbed small‐molecule sulfur in Ni/S/C nanotubes, thus lowering the electrode reaction overpotential and resistance remarkably. The mechanically stable nanotube framework could well accommodate the volume variation during potassiation/depotassiation process. As a result, a high K‐storage capacity of 608 mAh g −1 at 100 mA g −1 and stable cycling capacity of 330.6 mAh g −1 at 1000 mA g −1 after 500 cycles are achieved.

关键词： Kalium-Ionen-Batterien Kinetik Nanoengineering Nickel-Einzelatome Niedermolekularer Schwefel

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Lattice Compression Revealed at the ≈1 nm Scale

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Angewandte Chemie 2023年第39期135卷

作者： Ziwei Xu Hongwei Dong Dr. Wanmiao Gu Dr. Zhen He Fengming Jin Dr. Chengming Wang Dr. Qing You Prof. Dr. Jin Li Prof. Dr. Haiteng Deng Dr. Lingwen Liao Dr. Dong Chen Prof. Dr. Jun Yang Prof. Dr. Zhikun Wu Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and Nanotechnology CAS Center for Excellence in Nanoscience Institute of Solid State Physics HFIPS Chinese Academy of Sciences Hefei Anhui 230031 P. R. China University of Science and Technology of China Hefei 230026 P. R. China Institute of Physical Science and Information Technology Anhui University Hefei 230601 P. R. China Department of Chemistry City University of Hong Kong and Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM) Hong Kong 999077 P. R. China Instruments' Center for Physical Science University of Science and Technology of China Hefei 230026 P. R. China Tsinghua University-Peking University Joint Center for Life Sciences School of Life Sciences Tsinghua University Beijing 100084 P. R. China MOE Key Laboratory of Bioinformatics School of Life Sciences Tsinghua University Beijing 100084 P. R. China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 P. R. China

Lattice tuning at the ≈1 nm scale is fascinating and challenging; for instance, lattice compression at such a minuscule scale has not been observed. The lattice compression might also bring about some unusual properties, which waits to be verified. Through ligand induction, we herein achieve the lattice compression in a ≈1 nm gold nanocluster for the first time, as detected by the single-crystal X-ray crystallography. In a freshly synthesized Au 52 (CHT) 28 (CHT=S- c −C 6 H 11 ) nanocluster, the lattice distance of the (110) facet is found to be compressed from 4.51 to 3.58 Å at the near end. However, the lattice distances of the (111) and (100) facets show no change in different positions. The lattice-compressed nanocluster exhibits superior electrocatalytic activity for the CO 2 reduction reaction (CO 2 RR) compared to that exhibited by the same-sized Au 52 (TBBT) 32 (TBBT=4- tert -butyl-benzenethiolate) nanocluster and larger Au nanocrystals without lattice variation, indicating that lattice tuning is an efficient method for tailoring the properties of metal nanoclusters. Further theoretical calculations explain the high CO 2 RR performance of the lattice-compressed Au 52 (CHT) 28 and provide a correlation between its structure and catalytic activity.

关键词： CO2 Reduction Gold Heterogeneous Catalysis Lattice Compression Nanoclusters

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Fine Pore-Structure engineering by Ligand Conformational Control of Naphthalene Diimide-Based Semiconducting Porous Coordination Polymers for Efficient Chemiresistive Gas Sensing

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Angewandte Chemie 2022年第2期135卷

作者： Dr. Ziqian Xue Dr. Jia-Jia Zheng Dr. Yusuke Nishiyama Dr. Ming-Shui Yao Dr. Yoshitaka Aoyama Zeyu Fan Dr. Ping Wang Prof. Takashi Kajiwara Prof. Yoshiki Kubota Prof. Satoshi Horike Prof. Ken-ichi Otake Prof. Susumu Kitagawa Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced StudyKyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and Technology of China Beijing 100190 China RIKEN-JEOL Collaboration Center Yokohama Kanagawa 230-0045 Japan JEOL Ltd. Musashino Akishima Tokyo 196-8558 Japan State Key Laboratory of Multi-phase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Zhongguancun Beiertiao No. 1 Haidian Beijing 100190 China Department of Physics Graduate School of Science Osaka Metropolitan University 599-8531 Osaka Japan

Exploring new porous coordination polymers (PCPs) that have tunable structure and conductivity is attractive but remains challenging. Herein, fine pore structure engineering by ligand conformation control of naphthalene diimide (NDI)-based semiconducting PCPs with π stacking-dependent conductivity tunability is achieved. The π stacking distances and ligand conformation in these isoreticular PCPs were modulated by employing metal centers with different coordination geometries. As a result, three conjugated PCPs (Co−pyNDI, Ni−pyNDI, and Zn−pyNDI) with varying pore structure and conductivity were obtained. Their crystal structures were determined by three-dimensional electron diffraction. The through-space charge transfer and tunable pore structure in these PCPs result in modulated selectivity and sensitivity in gas sensing. Zn−pyNDI can serve as a room-temperature operable chemiresistive sensor selective to acetone.

关键词： PCPs/MOFs NDI Semiconductors Sensors 3D electron diffraction (3D ED)

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Signal characterization of frother dosage effect in two- phase column flotation process using capacitive measurement method

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AIP Conference Proceedings 2020年第1期2232卷

作者： Harisma Nugraha Annisa Nur Fitriani Didied Haryono Mahfudz Al Huda Warsito Purwo Taruno Sri Harjanto 1Center for Non-Destructive Testing and Process Imaging C-Tech Labs Edwar Technology Tangerang 15320 Indonesia 2Department of Metallurgical and Material Engineering University of Indonesia Depok 16424 Indonesia 3Advanced Materials and Tomography Laboratory University of Sultan Ageng Tirtayasa Cilegon 42435 Indonesia

Signal characterization using the capacitive measurement method is studied on the effect of frother dosage in the two-phase column flotation process. The aim of the study is to characterize the signal on the effect of frother dosage. A laboratory flotation column with 0.05 m diameter and 1.25 m height is used for the experiment. Frother of methyl isobutyl carbinol (MIBC) with the concentration of 1-50 ppm is used as a frother and the air injection from 1 to 5 liter per minute (l/m) is given to each frother dosage. All experiments use distilled water to maintain the purity of water since its purity affects the electrical properties. The results show that the capacitive signals as a function of time with and without the frother are different, in which the fluctuation of the process without frother is higher and it appears more frequent than with the frother, especially the difference is clearly seen at the air injection of 2.5 l/m. Furthermore, the capacitive signal decreases as the frother dosage increases. This occurs because the more frother dosage tends to produce more bubble which can decrease the capacitive signal. Based on this result, the effect of frother dosage can be characterized using the capacitive measurement method. Therefore, it has a potency to be developed as the process control and monitoring technology in the field of the flotation process.

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Correction to: Mechanical factors contributing to the Venus flytrap's rate-dependent response to stimuli

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Biomechanics and modeling in mechanobiology 2021年第6期20卷 2299页

作者： Eashan Saikia Nino F Läubli Hannes Vogler Markus Rüggeberg Hans J Herrmann Ingo Burgert Jan T Burri Bradley J Nelson Ueli Grossniklaus Falk K Wittel Department of Civil Environmental and Geomatic Engineering ETH Zurich 8093 Zurich Switzerland. esaikia@ethz.ch. Department of Mechanical and Process Engineering ETH Zurich 8092 Zurich Switzerland. Department of Chemical Engineering and Biotechnology University of Cambridge Cambridge CB3 0AS UK. Department of Plant and Microbial Biology and Zurich‑Basel Plant Science Center University of Zurich 8008 Zurich Switzerland. Institut Für Holztechnologie 01217 Dresden Germany. Laboratoire de Physique et Mécanique des Milieux Hétérogènes École Supérieur de Physique et de Chimie Industrielles de la Ville de Paris 75005 Paris France. Department of Civil Environmental and Geomatic Engineering ETH Zurich 8093 Zurich Switzerland. Swiss Federal Laboratories for Material Science and Technology-EMPA Cellulose and Wood Materials Laboratory 8600 Dubendorf Switzerland.

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Corrigendum to “CuSe 2 /CeO 2 as a novel heterogeneous catalyst for reductive carbonylation of nitroarenes for generating urethanes” [Appl. Catal. A Gen. 587 (2019) 117245]

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Applied Catalysis A: General 2020年 589卷

作者： Anh Vy Tran Thanh Tung Nguyen Hye Jin Lee Se Won Bae Jayeon Baek Hoon Sik Kim Yong Jin Kim Department of Green Process and System Engineering Korea University of Science and Technology (UST) 89 Yangdaegiro-gil Ipjang-myeon Cheonan 31056 Republic of Korea Green Chemistry & Material Group Korea Institute of Industrial Technology 89 Yangdaegiro-gil Cheonan-si 31056 Republic of Korea Department of Chemistry and Research Institute of Basic Sciences Kyung Hee University 26 Kyungheedaero Dongdaemun-gu Seoul 02447 Republic of Korea

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Bio-responsive microspheres for on-demand anti-inflammation and alveolar bone regeneration in periodontal disease

Bio-responsive microspheres for on-demand anti-inflammation ...

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The 3rd International Conference on Nanomedicine of China（ChinaNanomedicine 2018）

作者： Xin Chen Zhongning Liu Peter X.Ma School of Chemical Engineering and Technology Institute of Polymer Science in Chemical EngineeringShanxi Key Laboratory of Energy Chemical Process IntensificationXi'an Jiaotong University Department of Prosthodontics National Engineering Lab for Digital and Material Technology of StomatologyPeking University School and Hospital of Stomatology Department of Biologic and Materials Sciences The University of Michigan

Herein,poly(L-lactic acid)(PLLA) nanofibrous spongy microspheres(NFSMS),PLLA/polyethylene glycol(PEG) cofunctionalized mesoporous silica nanoparticles(MSN),and poly(lactic acid-co-glycolic acid) microspheres(PLGA MS)are integrated into one multibiologic delivery vehicle for in situ Treg manipulation,where the MSNs and PLGA MS were utilized to distinctly release IL-2/TGF-β and miR-10 a to locally recruit T cells and stimulate their differentiation into Tregs,while PLLA NF-SMS serve as an injectable scaffold for the adhesion and proliferation of these *** a mouse model of periodontitis,the injectable and biomolecule-delivering PLLA NF-SMS lead to Treg enrichment,expansion,and Treg-mediated immune therapy against bone *** system can potentially be utilized in a wide variety of other immune and regenerative therapies.

关键词： Tregs Bio-responsive microspheres for on-demand anti-inflammation and alveolar bone regeneration in periodontal disease

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The Effect of Flotation Reagents Addition (MIBC and PAX) on the Relative Permittivity Value Using 2-Electrode Capacitance Sensor

The Effect of Flotation Reagents Addition (MIBC and PAX) on ...

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engineering Physics International Conference, EPIC 2016

作者： Haryono, Didied Nugraha, Harisma Huda, Mahfudz Al Taruno, Warsito Purwo Harjanto, Sri Department of Metallurgical and Material Engineering Universitas Indonesia Depok Indonesia Center for Non-Destructive Testing and Process Imaging Ctech Labs Edwar Technology Tangerang Indonesia

In general, frother and collector are used as reagents to obtain an optimum condition in flotation processes. In this study, the effect of methyl isobutyl carbinol (MIBC) frother and potassium amyl xanthate (PAX) collector on the relative permittivity value using 2-electrode capacitance sensor was conducted. The objective of this study is to know the relative permittivity value of the material affected by MIBC and PAX additions. Permittivity obtained from this study would be used as basic data which is used to analyze the metallurgical performance of flotation process based on the 3-dimensional images (permittivity distribution) using electrical capacitance volume tomography (ECVT) in the further researches. Signal generator, oscilloscope, and 2-electorde capacitance sensor (electrode dimension of 40 x 40 mm) were used to measure the relative permittivity of sample which the samples were measured by using a frequency of 2.5 MHz at room temperature. Frother and collector concentration used in this study were 0.006;0.085;0.113;0.169;and 0.226 Molar of MIBC, and 0.004;0.007;0.011;and 0.015 Molar of PAX, respectively. Based on this study, it can be concluded that the relative permittivity value decreases with increasing of MIBC frother and increases with increasing of PAX collector. Minimum and maximum relative permittivity values obtained in this study were 9.70 and 9.72for the frother addition, and 11.12 and 11.17 for the collector addition. © 2017 The Authors.

关键词： Permittivity

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