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Catalyst–Support Interaction in Polyaniline‑Supported Ni_(3)Fe Oxide to Boost Oxygen Evolution Activities for Rechargeable Zn‑Air Batteries

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Nano-Micro Letters 2025年第1期17卷 176-190页

作者： Xiaohong Zou Qian Lu Mingcong Tang Jie Wu Kouer Zhang Wenzhi Li Yunxia Hu Xiaomin Xu Xiao Zhang Zongping Shao Liang An Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China jiangsu key laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and TechnologyNanjing University of Information Science and TechnologyNanjing 210044People’s Republic of China Department of Chemistry The Chinese University of Hong KongMa Lin BuildingShatinHong Kong SAR 999077People’s Republic of China WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia Research Institute for advanced manufacturing The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China

Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3)Fe oxide/PANI)with a robust hetero-interface,which significantly improves oxygen evolution activities with an overpotential of 270 mV at 10 mA cm^(-2)and specific activity of 2.08 mA cm_(ECSA)^(-2)at overpotential of 300 mV,3.84-fold that of Ni_(3)Fe *** is revealed that the catalyst–support interaction between Ni_(3)Fe oxide and PANI support enhances the Ni–O covalency via the interfacial Ni–N bond,thus promoting the charge and mass transfer on Ni_(3)Fe *** the excellent activity and stability,rechargeable Zn-air batteries with optimum Ni_(3)Fe oxide/PANI are assembled,delivering a low charge voltage of 1.95 V to cycle for 400 h at 10 mA cm^(-2).The regulation of the effect of catalyst–support interaction on catalytic activity provides new possibilities for the future design of highly efficient OER catalysts.

关键词： Catalyst-support interaction Supported catalysts Heterointerface Oxygen evolution reaction Zn-air batteries

Finite Element Simulations of Dynamic Fracture of Full-Scale Gas Transmission Pipelines

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Acta Mechanica Solida Sinica 2018年第3期31卷 357-368页

作者： Peishi Yu Jinjie Lv Junhua Zhao jiangsu key laboratory of advanced food manufacturing equipment and technology School of Mechanical Engineering Jiangnan University

The dynamic crack growth in a full-scale gas pipeline of API X80 steel is analyzed using the finite element method with the cohesive zone model. Based on the simulation, it is revealed that for the moderate steady-state crack growth, the crack-tip-opening angle strongly depends on the crack growth speed. In addition, the threshold initial crack sizes under different internal pressures are analyzed, which show a significant three-dimensional effect due to the wall thickness of the pipeline. The presented model offers a feasible way to study some details of the dynamic fracture of full-scale pipelines when tests are difficult or expensive.

关键词： Dynamic fracture Finite element Full-scale pipeline Cohesive zone model

Direct-Ink-Writing Printed Strain Rosette Sensor Array with Optimized Circuit Layout

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 205-211页

作者： Peishi Yu Lixin Qi Zhiyang Guo Yu Liu Junhua Zhao jiangsu key laboratory of advanced food manufacturing equipment and technology School of Mechanical EngineeringJiangnan UniversityWuxi 214122China jiangsu province Engineering Research Center of Micro-Nano Additive and Subtractive manufacturing Institute of Advanced TechnologyJiangnan UniversityWuxi 214122China

The full-field multiaxial strain measurement is highly desired for application of structural monitoring but still challenging,especially when the manufacturing and assembling for largearea sensing devices is quite *** with the traditional procedure of gluing commercial strain gauges on the structure surfaces for strain monitoring,the recently developed Direct-Ink-Writing(DIW)technology provides a feasible way to directly print sensors on the ***,there are still crucial issues in the design and printing strategies to be probed and ***,in this work,we propose an integrated strategy from layered circuit scheme to rapid manufacturing of strain rosette sensor array based on the DIW *** from the innovative design with simplified circuit layout and the advantages of DIW for printing multilayer structures,here we achieve optimization design principle for strain rosette sensor array with scalable circuit layout,which enable a hierarchical printing strategy for multiaxial strain monitoring in large scale or multiple *** strategy is highly expected to adapt for the emerging requirement in various applications such as integrated soft electronics,nondestructive testing and small-batch medical devices.

关键词： Direct-ink-writing Strain rosette sensor array Layered circuit scheme Printing strategy

Analytical method for softness abrasive flow field based on discrete phase model

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Science China(Technological Sciences) 2010年第10期53卷 2867-2877页

作者： JI ShiMing1,2, XIAO FengQing1,2 & TAN DaPeng1,2 1key laboratory of Special Purpose equipment and advanced manufacturing technology, (Zhejiang University of technology), Ministry of Education, Hangzhou 310014, China 2key laboratory of Special Purpose equipment and advanced manufacturing technology of Zhejiang province, Hangzhou 310014, China key laboratory of Special Purpose equipment and advanced manufacturing technology (Zhejiang University of Technology) Ministry of Education Hangzhou China key laboratory of Special Purpose equipment and advanced manufacturing technology of Zhejiang province Hangzhou China

Aiming at the problem of difficult contact finishing for mini structural surface in course of mould manufacturing,a new no-tool precision machining method based on soft abrasive flow machining (SAFM) was proposed. It allocated restrained component near surface machined,constituted restrained abrasive flow passage,and made the surface become a segment of passage wall. It could control turbulence abrasive flow in restrained passage,realize micro cutting for passage wall,and utilize the irregular motion of abrasive flow to eliminate the mono-directional marks on machined surfaces,and the precision could reach the specular level. A two-phase dynamic model of abrasive flow oriented to SAFM combined with discrete phase model (DPM) was established,the law of two-phase flow motion and the related physical parameters was obtained by corresponding numerical simulation method,and the mechanism of precision machining in SAFM was discussed. Simulation results show that the abrasive flow machining process mainly appears as translation of ablating location with the influence by granular pressure,and as the variation of machining efficiency with the influence by near-wall particle velocity. Thus via control of the inlet velocity and its corresponding machining time,it is supposed to work out the machining process according to the machining requirements by using the Preston equation to seek the relationship among velocity,pressure and material removing rate. By tracking near-wall particles,it can be confirmed that the movement of near-wall abrasive particles is similar to stream-wise vortices. The cutting traces on workpiece surfaces assume disorderly arrangement,so the feasibility of the SAFM method can be reaffirmed.

关键词： structural flow passage ultra-precision machining softness abrasive flow discrete phase model

Process Evaluation, Tensile Properties and Fatigue Resistance of Chopped and Continuous Fiber Reinforced Thermoplastic Composites by 3D Printing

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Journal of Renewable Materials 2022年第2期10卷 329-358页

作者： Wei Chen Qiuju Zhang Han Cao Ye Yuan School of Mechanical Engineering Jiangnan UniversityWuxi214122China jiangsu province key laboratory of advanced food manufacturing equipment and technology Jiangnan UniversityWuxi214122China

The aim of this article was to comprehensively evaluate the manufacturing process,tensile properties and fatigue resistance of the chopped and continuous fiber reinforced thermoplastic composites(CFRTPCs)by 3D *** main results included:the common defects of the printed CFRTPCs contained redundant and accumulation defects,scratch and warping defects;the continuous fiber contributed to the dimensional stability and accuracy of width and thickness;associations between mass percentage of fiber reinforcement and the averages of elastic mod-ulus,strain at break and ultimate tensile strength were approximately linear based on tensile test results;the fati-gue resistance improved with the increasing fiber reinforcement based on fatigue test *** for specimens with four fiber rings,there was a good linear relationship between the stress level and logarithm value of cycles during the whole life while those of pure matrix and specimens with one and two fiber rings were piecewise linear,taking about 10,000 cycles as *** micro morphology showed that the fatigue failure behaved as matrix fracture,large and small fiber bundles and single fibers extracted from *** the tension-tension fatigue load,the deformations where easily concentrating stress behaved as sunken surfaces along thickness and width directions,and the deformation along width direction was greater than that along thickness direction.

关键词： CFRTPCs 3D printing tensile test fatigue behavior stress level micro morphology

Stiffness Analysis of Corrugated Flexure Beam Used in Compliant Mechanisms

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Chinese Journal of Mechanical Engineering 2015年第4期28卷 776-784页

作者： WANG Nianfeng LIANG Xiaohe ZHANG Xianmin Guangdong province key laboratory of Precision equipment and manufacturing technology South China University of Technology

Conventional flexible joints generally have limited range of motion and high stress concentration. To overcome these shortcomings, corrugated flexure beam（CF beam） is designed because of its large flexibility obtained from longer overall length on the same span. The successful design of compliant mechanisms using CF beam requires manipulation of the stiffnesses as the design variables. Empirical equations of the CF beam stiffness components, except of the torsional stiffness, are obtained by curve-fitting method. The application ranges of all the parameters in each empirical equation are also discussed. The ratio of off-axis to axial stiffness is considered as a key characteristic of an effective compliant joint. And parameter study shows that the radius of semi-circular segment and the length of straight segment contribute most to the ratio. At last, CF beam is used to design translational and rotational flexible joints, which also verifies the validity of the empirical equations. CF beam with large flexibility is presented, and empirical equations of its stiffness are proposed to facilitate the design of flexible joint with large range of motion.

关键词： corrugated flexure beam stiffness analysis compliant mechanisms

Study on the influence of food emulsion components on its lubrication characteristics and smooth perception

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Friction 2024年第11期12卷 2491-2504页

作者： Shanhua QIAN Liang WANG Ziyan ZHENG Qichen TANG Da BIAN School of Mechanical Engineering Jiangnan UniversityWuxi 214122China jiangsu key laboratory of advanced food manufacturing equipment and technology Jiangnan UniversityWuxi 214122China

Due to the increasing risk of obesity and cardiovascular diseases caused by high-fat diets,low-fat foods have become a priority demand for consumers’***,the smoothness perception and scientific assessment methods of the existing low-fat foods should be *** this study,three food emulsions were prepared,and their lubrication characteristics,sensory evaluation of smoothness,and electroencephalogram(EEG)signals were assessed to preliminarily investigate the effects of food emulsion components on their above *** results showed that fat substitute(FSU)and fat could significantly reduce coefficient of friction(CoF)of the food emulsions,with average CoF reduced by 28%and 63%compared to the original food *** addition,fat-enriched food emulsions continued to exhibit excellent lubrication characteristics after adding artificial saliva,with an average CoF reduced by 31.1%compared to that of the food emulsions without artificial *** FSU and fat improved the smoothness of food emulsions,and the lubricating properties of fat were more pronounced,with fat-enriched food emulsion which could provide a substantial improvement in smoothness compared to the fat-free food *** of subjects’EEG signals revealed that food emulsion with lower CoF and higher smoothness triggered higher P3 amplitudes and longer *** findings provide better insights into the scientific evaluation of food texture and the development of low-fat foods.

关键词： food emulsion soft friction sensory evaluation electroencephalogram(EEG)signal fat substitute

Intelligent control for quality improvement in green tea fixation assisted with aroma detection

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food Bioscience 2023年第3期53卷 2939-2951页

作者： Feihu Song Xiaohu Jia Zhenfeng Li Chunfang Song jiangsu key laboratory of advanced food manufacturing equipment&technology School of Mechanical EngineeringJiangnan UniversityWuxiJiangsu214122PR China

An intelligent control system is designed in green tea fixation,which can automatically and continuously adjust the fixation parameters for quality *** is detected with PEN-3 electronic nose,and signals are sent to the *** the aroma signals,the fixation process is separated into two stages:in the first stage,the key purpose is enzymatic reaction,which can be suppressed with high temperature;it is the oxidation re-action which should be concentrated on in the second stage,and a middle temperature is a good *** the designed fuzzy logic algorithm,the pot temperature is kept at a high level at the beginning,and the enzymatic reaction can be successfully *** the second stage,the temperature is kept at a middle value to decrease *** the designed intelligent control,the green tea product quality is improved for aroma,taste,appearance,liquor color,and residues.

关键词： Intelligent control Green tea fixation Fuzzy algorithm Aroma detection

Multiscale Theories and Applications:From Microstructure Design to Macroscopic Assessment for Carbon Nanotubes Networks

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Chinese Journal of Mechanical Engineering 2023年第3期36卷 18-35页

作者： Jiachao Ji Yulin Jin Anping Hua Chunhua Zhu Junhua Zhao jiangsu key laboratory of advanced food manufacturing equipment and technology Jiangnan UniversityWuxi 214122China Institute of Mechanics and advanced Materials School of Mechanical EngineeringJiangnan UniversityWuxi 214122China

Carbon nanotube(CNT)networks enable CNTs to be used as building blocks for synthesizing novel advanced materials,thus taking full advantage of the superior properties of individual *** analyses have to be adopted to study the load transfer mechanisms of CNT networks from the atomic scale to the macroscopic scale due to the huge computational *** them,fully resolved structural features include the graphitic honeycomb lattice(atomic),inter-tube stacking(nano)and assembly(meso)of *** an atomic scale,the elastic properties,ultimate stresses,and failure strains of individual CNTs with distinct chiralities and radii are obtained under various loading conditions by molecular *** dependence of the cohesive energies on spacing distances,crossing angles,size and edge effects between two CNTs is analyzed through continuum modeling in *** mesoscale models,which neglect the atomic structures of individual CNTs but retain geometrical information about the shape of CNTs and their assembly into a network,have been developed to study the multi-level mechanism of material deformation and microstructural evolution in CNT networks under stretching,from elastic elongation,strengthening to damage and *** paper summarizes the multiscale theories mentioned above,which should provide insight into the optimal assembling of CNT network materials for elevated mechanical performance.

关键词： Carbon nanotube networks Hierarchical structures Multiscale theories Mesoscale model