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Super-elastic and mechanically durable MXene-based nanocomposite aerogels enabled by interfacial engineering with dual crosslinking strategy

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Nano research 2023年第5期16卷 8025-8035页

作者： Yan Sun Xin Yang ruonan ding Sung Yong Hong Jinwoo Lee Zongfu An Mei Wang Yifei Ma Jae-do Nam Jonghwan Suhr China Copper Institute of Engineering and Technology Chinalco Research Institute of Science and Technology Co.Ltd.Beijing 102200China Center for Composite Materials and Concurrent Design Sungkyunkwan UniversitySuwon 16419Republic of Korea Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing 210009China Department of Energy Science Sungkyunkwan UniversitySuwon 16419Republic of Korea MPP PJT.PO R&D Center Polyolefin Business Petrochemicals DivisionLG ChemDaejeon 34122Republic of Korea Department of Polymer Science and Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea School of Chemical Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyCollaborative Innovation Center of Extreme OpticsShanxi UniversityTaiyuan 030006China School of Mechanical Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea

recently,MXenes have attracted considerable attention owing to their unique physical and chemical *** of MXenes to three-dimensional(3d)porous aerogel structures can play a critical role in realizing the profound implications of MXenes,especially for environmental ***,developing mechanically robust MXene-based aerogels with reversible compressibility under harsh conditions,such as liquid environments,remains challenging due to the insufficient interfacial strength between MXene ***,3d porous MXene-based nanocomposite aerogels are developed by dual physical and chemical crosslinking strategy with poly(vinyl alcohol)and formaldehyde in this *** developed MXenebased nanocomposite aerogels with designed interfacial engineering exhibit outstanding structural stability and extremely high reversible compressibility up to 98%strain as well as unprecedented mechanical durability(2000 cycles at 50%strain)in water ***,the aerogels show adaptable compressibility when exposed to different solvents,which is explained with the Hansen solubility *** to their high compressibility in water,the robust MXene-based aerogels exhibit excellent methylene blue adsorption performance(adsorption capacity of 117.87 mg·g^(−1))and superior recycling efficiency(89.48%at the 3rd cycle).The porous MXene-based nanocomposite aerogels are also demonstrated with outstanding thermal insulation ***,by synergistically taking their porous structure and super elasticity in liquid environment,the MXene-based aerogels show great promise in diverse applications including adsorption and separation,wastewater purification desalination,and thermal management.

关键词： MXenes-based nanocomposite aerogels dual crosslinking strategy reversible compressibility methylene blue adsorption thermal insulation

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Effects of oxidation and precursors(lysine,glyoxal and Schiff base)on the formation of Nε-carboxymethyl-lysine in aged,stored and thermally treated chicken meat

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Food Science and Human Wellness 2022年第5期11卷 1252-1258页

作者： Suhong Huang Xiaoli dong Yulong Zhang Ming Huang Yuandong Zheng Jiangsu Collaborative Innovation Center of Meat Production and Processing Quality and Safety ControlCollege of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095China Jiangsu Province Research Engineering Center for Livestock and Poultry Meat Processing National R&D Center for Poultry Processing TechnologyNanjing Huangjiaoshou Food Science and Technology Co.Ltd.Nanjing 210095China Henan Province Qi County Yongda Food Industry Co. Ltd.Hebi 458000China

Advanced glycation end products(AGEs)might pose health risks,and processing and storage could accelerate the generation of AGEs in ***,limited few reports indicated the changes of AGEs contents in meat during *** this study,the aim is to investigate the oxidation and precursors and their roles in the formation of N^(ε)-carboxymethyl-lysine(CML)in raw and cooked chicken meat after post-mortem ageing and *** post-mortem ageing and storage time increased,the CML content in cooked chicken breast significantly increased from 1.81 mg/kg to 2.00 mg/kg during 0-6 h,and then decreased from 2.00 mg/kg to 1.80 mg/kg during 6 h-1 day,finally increased again during 1-7 days,while the CML contents of raw and cooked leg significantly and continuously increased from 1.78 mg/kg to 2.08 mg/***,CML was extremely positively correlated with fat oxidation(r^(2)=0.793,P<0.01),protein oxidation(r^(2)=0.917,P<0.01)and glyoxal(r^(2)=0.678,P<0.05),and was negatively correlated with lysine(r^(2)=0.536,P<0.05).No significant correlation was observed between the Schiff base and CML.

关键词： Nε-carboxymethyl-lysine Chicken Post-mortem ageing Storage Oxidation Precursors

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review on the relationship Between Liquid Aerospace Fuel Composition and Their Physicochemical Properties

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Transactions of Tianjin University 2021年第2期27卷 87-109页

作者： Xiaoyu Wang Tinghao Jia Lun Pan Qing Liu Yunming Fang Ji-Jun Zou Xiangwen Zhang Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovative Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Department of Chemical Engineering National Energy R&D Research Center for Biorefi neryBeijing University of Chemical TechnologyBeijing 100029China

The development of advanced air transportation has raised new demands for high-performance liquid hydrocarbon ***,the measurement of fuel properties is time-consuming,cost-intensive,and limited to the operating *** physicochemical properties of aerospace fuels are directly infl uenced by chemical ***,a thorough investigation should be conducted on the inherent relationship between fuel properties and composition for the design and synthesis of high-grade fuels and the prediction of fuel properties in the *** work summarized the eff ects of fuel composition and hydrocarbon molecular structure on the fuel physicochemical properties,including density,net heat of combustion(NHOC),low-temperature fl uidity(viscosity and freezing point),fl ash point,and thermal-oxidative *** correlations and predictions of fuel properties from chemical composition were ***,we correlated the fuel properties with hydrogen/carbon molar ratios(n H/C)and molecular weight(M).The results from the least-square method implicate that the coupling of H/C molar ratio and M is suitable for the estimation of density,NHOC,viscosity and eff ectiveness for the design,manufacture,and evaluation of aviation hydrocarbon fuels.

关键词： Liquid hydrocarbon fuel Physicochemical properties Composition Molecular structure Fuel properties correlation

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Optimal center-of-Mass Pivot Effect of Spinal Motion in Feline Galloping

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Journal of Bionic engineering 2020年第5期17卷 970-977页

作者： Young Kook Kim dongwon Yun LV R&D team Electro-technology R&D CenterLS ELECTRIC Co.LtdCheongju 28437South Korea Department of Robotics Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988South Korea

In this paper,we studied the acceleration behavior of a quadruped animal during a galloping *** the development of many quadruped robotic systems has been focused on dynamic movements,it is obvious that guidance from the dynamic behavior of quadruped animals is needed for robotics *** fulfill this demand,this paper deals with analysis of the galloping motions of a domestic cat,which is well known for its excellent acceleration performance among four-legged *** on the planar motion capture environment,the movement data of a galloping feline was acquired and the dynamic motions were estimated using a spring-mass *** particular,the effects of the position and angle of the center-of-mass of the cat,angular displacement of the spine,and angular velocity of the spine were analyzed and are discussed *** this process,it was possible to understand the dynamic movement characteristics of the cat,and to understand the relationships between,and the influences of,these *** this analysis,we provide significant data applicable to the design of joint movements in quadruped robot systems.

关键词： quadrupedalism feline galloping domestic cat center-of-mass

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Enhanced bifunctional catalytic activities of N-doped graphene by Ni in a 3d trimodal nanoporous nanotubular network and its ultralong cycling performance in Zn-air batteries

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Journal of Energy Chemistry 2022年第3期31卷 466-473,I0013页

作者： Yanyi Zhang Xiang-Peng Kong Xiaorong Lin Kailong Hu Weiwei Zhao Guoqiang Xie Xi Lin Xingjun Liu Yoshikazu Ito Hua-Jun Qiu School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055GuangdongChina Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials Shenzhen 518055GuangdongChina State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Blockchain Development and Research Institute Harbin Institute of TechnologyShenzhen 518055GuangdongChina Institute of Applied Physics Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukuba 305-8573Japan

Free-standing and fexible air electrodes with long-lasting bifunctional activities for both the oxygen reduction reaction(Orr)and the oxygen evolution reaction(OEr)are crucial to the development of wearable Zn-air rechargeable *** this work,we synthesize a fexible air electrode consisting of 3d nanoporous N-doped graphene with trimodal shells and Ni particles through repeated chemical vapor deposition(CVd)and acidic etching *** results indicate that such trimodal graphene morphology significantly enhances the active N-dopant sites and graphene-coated Ni surface,which consequentially boosts both the Orr and OEr activities,as well as catalytic ***-principles density functional theory(dFT)calculations reveal the synergetic effects between the Ni and the N-doped graphene;namely,the Ni nanoparticles boost the bifunctional activities of the coated N-doped graphene,and in turn the graphene-covering layers enhance the stability of *** to the better protection from the triple graphene shells,our trimodal N-doped graphene/Ni-based Zn-air battery can be stably discharged/recharged beyond 2500 h with low *** is reasonable to expect that such freestanding trimodal graphene/Ni would be promising in many fexible energy conversion/storage devices.

关键词： Triple shells Bifunctional Hierarchical Cycling durability Orr/OEr

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Ester-Crosslinked Polymers of Intrinsic Microporosity Membranes with Enhanced Co2 Plasticization resistance for Energy-Efficient Gas Separations

SSRN

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SSrN 2023年

作者： Sun, Yongchao Zhang, Jingfa Li, Hongjin Fan, Fangxu Zhao, Qizheng He, Gaohong Ma, Canghai State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Dalian116024 China

Polymers of intrinsic microporosity (PIMs) has seen a growing role in gas separation membranes. Further exploitation of gas separation performance of PIM membranes and overcoming their persistent challenge of plasticization are urgently demanded. To address these issues, exemplified PIM-1 is synthesized and hydrolyzed to form carboxylated PIM-COOH polymers, followed by esterification using propylene glycol to prepare monoesterified PIM, which is finally thermally ester-crosslinked at various temperatures and time. The 300 oC-8 h treated membranes exhibit a CO2 and H2 permeability of 7421 and 3853 Barrers, respectively, with a CO2/CH4, CO2/N2, H2/N2 and H2/CH4 selectivity of 11.5, 19.2, 11.1 and 10.0, respectively, considerably exceeding the 2008 robeson upper bounds. Furthermore, the crosslinked membranes demonstrate significantly enhanced CO2 plasticization resistance up to 42 bar, compared with uncrosslinked ones. It is the first time of reporting ester-crosslinking of carboxylated PIM-1 with both higher gas permeability and selectivity than PIM-1, using a much milder crosslinking temperature than other techniques, such as decarboxylated crosslinking. The design principle of this work opens a door for preparing high-performance and plasticization-resistant PIM membranes with tremendous promises for energy-efficient gas separations. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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Portable gait analysis sensor model for Parkinson's disease

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Materials Today: Proceedings 2022年 63卷 653-662页

作者： Piromalis, dimitrios Kounelis, Marios Kolovos, dimitrios P. Kokkotis, Christos Tsatalas, Themistoklis Bellis, George Tsaopoulos, dimitrios Giakas, Giannis Chronakis, Antonis Koutsouraki, Eleni Tsotsolas, Nikos randhawa, Princy Patel, Akshet Industrial Design and Production Engineering University of West Attica Egaleo Greece R&D Dept Pan Antistixis SA Industrial Informatics Engineer INNOESYS P.C. Egaleo Greece Biomechanical Solutions Karditsa Greece Department of Physical Education & Sport Science University of Thessaly Trikala Greece Institute for Bioeconomy & Agri-Technology Center for Research and Technology Hellas Volos Greece R&D Dept E. Koutsouraki & SIA E.E - Knowledge Brokers Athens Greece DigiT-DSS Lab University of West Attica Egaleo Greece Department of Mechatronics Engineering Manipal University Jaipur Jaipur India

As part of a research project, a small gait analysis device is being developed that will be used outside of home by the patients themselves. Its main purpose will be to record accurate gait measurements in patients with Parkinson's disease and proceed with in-depth analysis of the gait characteristics. A key feature of the device will be its small size, which creates specific requirements in terms of device consumption restrictions due to the small size of the battery and the need for autonomous operation for more than ten hours. This research work describes, on the one hand, the firmware of the device with an emphasis on the functions that will be implemented;and, on the other, the device software which will support the process that will be adopted for reading and processing data from the devices placed on patients' feet to record the gait characteristics of patients on a continuous basis. Using these computational approaches, we developed and carried out an experiment with a 1.60 m tall experimental female subject. We strapped a device to the subject's right ankle and instructed her to take five steps with her right foot, turn 180 degrees, and repeat with the same foot. © 2022

关键词： Firmware

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Ester-Crosslinked Polymers of Intrinsic Microporosity Membranes with Enhanced Plasticization resistance for Co2 Separation

SSRN

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SSrN 2023年

Polymers of intrinsic microporosity (PIMs) have seen a growing role in gas separation membranes. Further exploitation of gas separation performance of PIM membranes and overcoming their persistent challenge of plasticization are urgently demanded. To address these issues, exemplified PIM-1 is synthesized and hydrolyzed to form carboxylated PIM-COOH polymers, followed by esterification using propylene glycol to prepare monoesterified PIM, which is finally thermally ester-crosslinked at various temperatures and time. The 300 oC-8 h treated membranes exhibit a CO2 permeability of 7421 Barrers, with a CO2/CH4 and CO2/N2 selectivity of 11.5 and 19.2, respectively, considerably exceeding the 2008 robeson upper bounds. Furthermore, the crosslinked membranes demonstrate significantly enhanced CO2 plasticization resistance up to 42 bar, compared with uncrosslinked ones. It is the first time of reporting ester-crosslinking of carboxylated PIM-1 with both higher gas permeability and selectivity than PIM-1, using a much milder crosslinking temperature than other techniques, such as decarboxylated crosslinking. The design principle of this work paves the way for preparing high-performance and plasticization-resistant PIM membranes with promises for energy-efficient gas separations. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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design Harmonic drive for Application in robot Joint

Design Harmonic Drive for Application in Robot Joint

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2022 International Conference on Mechanical and Electronics engineering, ICMEE 2022

作者： Trang, ThanhTrung Pham, ThanhLong Yin, QiNing Wang, QingWei Hu, YueMing Li, WeiGuang School of Automation Science and Engineering South China University of Technology Guangzhou China Faculty of Mechanical Engineering Thai Nguyen University of Technology Thai Nguyen Viet Nam Machinery R&d Technology Center Zhongshan Mltor Cnc Technology Co. Ltd Zhongshan China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou China

ISBN: (纸本)9781665492201

In industrial robot design, selecting a motor and reducer is one of the essential elements in the design process. The typical mechanical reducer type is a gear train or planetary gear set. Unfortunately, the gear train and the planetary gear have a meager gear ratio, while their weight is too heavy, the transmission repetition accuracy is low and has a high backlash. On the other hand, the harmonic reducer system developed from the transmission gear has an elastic strain wave, which gives a better gear ratio per weight than those two gear systems. In this paper, a harmonic gear reducer is designed according to the transmission requirements and applied rotation to the base of a Puma 560 industrial robot. The harmonic drive is designed under gear physical requirements and robot techniques properties. The required gear ratio of the rotary joint of 1/50, gear geometry design, manufacturing, calculation, and simulation of strength, the safety factor, and experimental results have verified the designs. © 2022 IEEE.

关键词： Industrial robots

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Impact of Interfacial Layer on the Optoelectronic Performance of MoTe2/Ge Heterojunction

Impact of Interfacial Layer on the Optoelectronic Performanc...

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International Conference on Solid-State and Integrated Circuit technology

作者： Wenyu Lei Xiaokun Wen Boyuan di Xinyue Xu Haixin Chang Wenfeng Zhang Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan PRC Shenzhen R&D Center of Huazhong University of Science and Technology Shenzhen PRC

ISBN: (数字)9798350361834

ISBN: (纸本)9798350361841

In this paper, three types of ultra-thin interfacial oxide layers including GeO 2 , Al 2 O 3 , and SiO 2 , are designed to inserted into the interface of MoTe 2 /Ge heterojunction to investigate its impact on the photoelectric performance. The device with GeO 2 interfacial layer exhibits the maximum responsivity and detectivity as well as the relatively large rectification ratio, reaching values of 1.38 A/W, $1.32\times 10^r$ Jones, and 140, respectively. For the device with Al 2 O 3 interfacial layer, the maximum rectification ratio and the relatively high detectivity are achieved, reaching values of 807 and $1.56\times 10^r$ Jones, respectively. While for the MoTe 2 /Ge heterojunction with SiO 2 interfacial layer, which shows an ideality factor of 2.14 and the lowest rectification ratio together with the detectivity. These results indicate that both the interface quality and bandgap of ultrathin interfacial layer would be crucial for the photoelectronic performance of MoTe 2 /Ge heterojunction.

关键词： Silicon compounds Performance evaluation Integrated circuit technology Photonic band gap Heterojunctions Aluminum oxide

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