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Improvement in Toughness of Poly(ethylene 2,5-furandicarboxylate) by Melt Blending with Bio-based Polyamide11 in the Presence of a Reactive co.patibilizer

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Chinese Journal of Polymer Science 2020年第10期38卷 1099-1106页

作者： Yong Yang An-Ping Tian Ya-Jin Fang Jing-Gang Wang Jin Zhu Key Laboratory of Bio-based Polymeric Materials technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of Sciences weihai honglin electronic technology co. LTD

The objective of this study was to improve the toughness of bio-based brittle poly(ethylene 2,5-furandicarboxylate)(PEF) by melt blending with bio-based polyamide11(PA11) in the presence of a reactive multifunctional epoxy co.patibilizer(Joncryl ADR?-4368).The morphological,thermal,rheological,and mechanical properties of PEF/PA1 1 blends were *** with neat PEF,the toughness of PEF/PA11 blend was not improved in the absence of the reactive co.patibilizer due to the poor co.patibility between the two *** Joncryl was inco.porated into PEF/PA1 1 blends,the interfacial tension between PEF and PA1 1 was obviously reduced,reflecting in the fine average particle size and narrow distribution of PA11 dispersed phase as observed by scanning electron microsco.y(SEM).The co.plex visco.ities of PEF/PA11 blends with Joncryl were much higher than that of PEF/PA11 blend,which co.ld be ascribed to the formation of graft co.olymers through the epoxy groups of Joncryl reacting with the end groups of PEF and PA11 molecular ***,the co.patibility and interfacial adhesion between PEF and PA11 were greatly improved in the presence of *** co.patibilized PEF/PA11 blend with 1.5 phr Joncryl exhibited significantly improved elongation at break and unnotch impact strength with values of 90.1% and 30.3 kJ/m2,respectively,co.pared with those of 3.6% and 3.8 kJ/m2for neat PEF,*** work provides an effective approach to improve the toughness of PEF which may expand its widespread application in packaging.

关键词： Poly(ethylene 2,5-furandicarboxylate) Polyamide11 Bio-based polymers Reactive co.patibilization Toughening

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Facile fabrication of graphene/g-C_(3)N_(4) for electromagnetic wave absorption

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Nano Research 2024年第3期17卷 1687-1698页

作者： Qiang Su Yunfei He Dongdong Liu Daguang Li Long Xia Xiaoxiao Huang Bo Zhong School of Materials Science and Engineering Harbin Institute of Technology WeihaiWeihai 264209China weihai Yunshan technology co. Ltd.Weihai 264200China State Key Laboratory on Integrated Optoelectronics College of Electronic Science&EngineeringJilin UniversityChangchun 130012China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

With the development of the miniaturization of electronic equipment and lightweight weapon equipment,there are new requirements for electromagnetic wave absorption material(EMWAM).EMWAM has outstanding electromagnetic wave absorption properties and lightweight characteristics beco.e an important direction of *** this study,graphene/g-C_(3)N_(4)(GGCN)EMWAM was first synthesized in situ by simple heat treatment,in which the g-C_(3)N_(4) had a porous structure and dispersed on the surface of *** impedance matching of the GGCN was well adjusted by decreasing the dielectric co.stant and attenuation co.stant due to the g-C_(3)N_(4) semico.ductor property and the graphite-like *** EMW loss mechanism of GGCN was also analyzed by simulating GGCN’s electric field mode distribution and resistance loss power *** analysis result shows that the distribution of g-C_(3)N_(4) among GGCN sheets can produce more polarization effects and relaxation effects by increasing the lamellar ***,the polarization loss of GGCN co.ld be increased successfully by porous g-C_(3)N_(4).Ultimately,the EMW absorption property of GGCN is optimized significantly,and GGCN exhibits excellent EMW absorption *** the thickness is 2 mm,the effective absorption bandwidth(EAB)can reach 4.6 GHz,and when the thickness is 4.5 mm,the minimum reflection loss(RLmin)at 4.56 GHz can reach-34.69 ***,the practical application of EMWAM was studied by radar cross-section(RCS)simulation,showing that GGCN has a good application prospect.

关键词： graphene/g-C_(3)N_(4) impedance matching simulation analysis dielectric loss excellent electromagnetic wave absorption

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Improvement in Toughness of Poly(ethyiene 2,5-furandicarboxyiate) by Melt Blending with Bio-based Polyamidel 1 in the Presence of a Reactive co.patibilizer

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Chinese Journal of Polymer Science 2020年第10期38卷 1099-1106,I0006页

作者： Yong Yang An-Ping Tian Ya-Jin Fang Jing-Gang Wang Jin Zhu Key Laboratory of Bio based Polymeric Materials technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China weihai honglin electronic technologyco LTDWeihai 264205 China

The objective of this study was to improve the toughness of bio based brittle poly(ethylene 2,5-furandicarboxylate)(PEF)by melt blending with bio based polyamide11(PA11)in the presence of a reactive multifunctional epoxy co.patibilizer(Joncryl ADR-4368).The morphological,thermal,rheological,and mechanical properties of PEF/PA11 blends were *** with neat PEF,the toughness of PEF/PA11 blend was not improved in the absence of the reactive co.patibilizer due to the poor co.patibility between the two *** Joncryl was inco.porated into PEF/PA11 blends,the interfacial tension between PEF and PA11 was obviously reduced,reflecting in the fine average particle size and narrow distribution of PA11 dispersed phase as observed by scanning electron microsco.y(SEM).The co.plex visco.ities of PEF/PA11 blends with Joncryl were much higher than that of PEF/PA11 blend,which co.ld be ascribed to the formation of graft co.olymers through the epoxy groups of Joncryl reacting with the end groups of PEF and PA11 molecular ***,the co.patibility and interfacial adhesion between PEF and PA11 were greatly improved in the presence of *** co.patibilized PEF/PA11 blend with 1.5 phr Joncryl exhibited significantly improved elongation at break and unnotch impact strength with values of 90.1%and 30.3kJ/m2,respectively,co.pared with those of 3.6%and 3.8 kJ/m2 for neat PEF,*** work provides an effective approach to improve the toughness of PEF which may expand its widespread application in packaging.

关键词： Poly(ethylene 2.5-furandicarboxylate) Polyamide11 Bio based polymers Reactive co.patibilization Toughening

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Multi-network-region traffic co.perative scheduling in large-scale LEO satellite networks

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Journal of Systems Engineering and electronics 2024年第4期35卷 829-841页

作者： LI Chengxi WANG Fu YAN Wei CUI Yansong FAN Xiaodong ZHU Guangyu XIE Yanxi YANG Lixin ZHOU Luming ZHAO Ran WANG Ning School of electronic Engineering Beijing University of Posts and TelecommunicationsBeijing 100876China The 6th Research Institute of China electronics co.poration Beijing 102209China China Satellite Network Share Operation co. LtdBeijing 100876China weihai electronic Information technology co.prehensive Research Center of the Ministry of Industry and Information technology weihai 264200 China

A low-Earth-orbit(LEO)satellite network can provide full-co.erage access services worldwide and is an essential candidate for future 6G ***,the large variability of the geographic distribution of the Earth’s population leads to an uneven service volume distribution of access ***,the limitations on the resources of satellites are far from being able to serve the traffic in hotspot *** enhance the forwarding capability of satellite networks,we first assess how hotspot areas under different load cases and spatial scales significantly affect the network throughput of an LEO satellite network ***,we propose a multi-region co.perative traffic scheduling *** algorithm migrates low-grade traffic from hotspot areas to co.dspot areas for forwarding,significantly increasing the overall throughput of the satellite network while sacrificing some latency of end-to-end *** algorithm can utilize all the global satellite resources and improve the utilization of network *** model the co.perative multi-region scheduling of large-scale LEO *** on the model,we build a system testbed using OMNET++to co.pare the proposed method with existing *** simulations show that our proposed method can reduce the packet loss probability by 30%and improve the resource utilization ratio by 3.69%.

关键词： low-Earth-orbit(LEO)satellite network satellite co.munication load balance multi-region scheduling latency optimization

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Tunable co.ZnO/C@MWCNTs based on carbon nanotube-co.ted MOF with excellent microwave absorption properties

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Journal of Materials Science & technology 2022年第32期127卷 153-163页

作者： Zirui Jia Mingyue Kong Bowen Yu Yingzhuo Ma Jiaying Pan Guanglei Wu Institute of Materials for Energy and Environment State Key Laboratory of Bio-Fibers and Eco-TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China co.lege of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China weihai Innovation Institute Qingdao UniversityWeihai 264200China

The development of global information technology makes human life intelligent,and the large-scale use of various electronic devices increases the electromagnetic radiation in the surrounding *** has created a requirement for the development of high-performance electromagnetic wave absorbers to eliminate electromagnetic ***,the preparation of electromagnetic wave absorbers with excellent electromagnetic loss capability remains a great ***,we present a method to prepare co.ZnO/C@MWCNTs(CZC@M)co.posites by pyrolysis of Znco.MOF@MWCNTs(MOF@M).Specifically,MWCNTs are uniformly distributed on the CZC surface to form multiple heterogeneous interfaces,which will lead to an increase in *** addition,changing the amounts of MWCNTs in the co.posite can modulate its dielectric co.stant and impedance matching ***,at only 10%sample co.tent,the minimum reflection loss of-41.75 d B and the maximum effective absorption bandwidth of 4.72 GHz are obtained at thicknesses of 2.4 mm and 2.2 mm,***,the results reported in this work provide a new design strategy for the synthesis of high-performance electromagnetic wave absorbers with potential applications in the elimination of electromagnetic pollution.

关键词： MWCNTs Metal organic frameworks CZC@M Microwave absorption

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Design,Simulation and Kinematic Validation of a Hip Prosthetic Mechanism with a Multimotor Function

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Journal of Bionic Engineering 2024年第3期21卷 1321-1333页

作者： Majun Song Zhongyi Li Jingjing Jiang weihai Chen Sheng Guo Hao Zheng Lianzheng Niu Hangzhou Innovation Institute Beihang UniversityHangzhou310051China Hangzhou Huacheng Software technology co.Ltd. Hangzhou310051China School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing100044China

We previously developed a powered hip prosthetic mechanism with kinematic functions of hip flexion-extension and abduction-adduction,and its theoretical and simulation-based kinematics were *** internal-external hip rotation has a positive effect on the movements of human lower limbs acco.ding to medical research,we developed a novel hip prosthetic mechanism based on a previous hip prosthesis that possesses motion characteristics similar to those of a human bionic hip,and the motion characteristics of multiple Degrees-of-Freedom(DoFs)were analyzed after kinematic ***,a walking model of the human‒machine model was established,and the walking stability of an amputee,which reflects the rehabilitation effect,was explored while the hip prosthetic mechanism co.sidered the internal-external rotation of the ***,a prototype and its verification platform were built,and kinematic validation of the hip prosthetic mechanism was carried *** results showed that the designed Parallel Mechanism(PM)possesses human-like motion characteristics similar to those of a human bionic hip and can be used as a hip ***,the existing motion characteristic of internal-external hip rotation can enhance the walking stability of an amputee via this hip prosthetic mechanism.

关键词： Hip prosthetic mechanism Parallel mechanism Walking stability Kinematic validation

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Recent Progress in Distributed Optical Fiber Raman Photon Sensors at China Jiliang University

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Photonic Sensors 2012年第2期2卷 127-147页

作者： Zaixuan ZHANG Jianfeng WANG Yi LI HuapingGONG Xiangdong YU honglin LIU Yongxing JIN Juan KANG Chenxia LI Wensheng ZHANG Wenping ZHANG Chunliu ZHAO Xinyong DONG Shangzhong JIN Institute of Optoelectronic technology College of Optical & Electronic Technology China Jiliang UniversityHangzhou 310018 China China Jiliang University-BaYang Electric Group United Optical Fiber Sensing Research Center Hangzhou 310018 Hangzhou Optoelectronic technology co. Ltd. Hangzhou 310018 China

A brief review of recent progress in researches, productions and applications of full distributed fiber Raman photon sensors at China Jiliang University （CJLU） is presented. In order to improve the measurement distance, the accuracy, the space resolution, the ability of multi-parameter measurements, and the intelligence of full distributed fiber sensor systems, a new generation fiber sensor technology based on the optical fiber nonlinear scattering fusion principle is proposed. A series of new generation full distributed fiber sensors are investigated and designed, which co.sist of new generation ultra-long distance full distributed fiber Raman and Rayleigh scattering photon sensors integrated with a fiber Raman amplifier, auto-co.rection full distributed fiber Raman photon temperature sensors based on Raman co.relation dual sources, full distributed fiber Raman photon temperature sensors based on a pulse co.ing source, full distributed fiber Raman photon temperature sensors using a fiber Raman wavelength shifter, a new type of Brillouin optical time domain analyzers （BOTDAs） integrated with a fiber Raman amplifier for replacing a fiber Brillouin amplifier, full distributed fiber Raman and Brillouin photon sensors integrated with a fiber Raman amplifier, and full distributed fiber Brillouin photon sensors integrated with a fiber Brillouin frequency shifter. The Internet of things is believed as one of candidates of the next technological revolution, which has driven hundreds of millions of class markets. Sensor networks are important co.ponents of the Internet of things. The full distributed optical fiber sensor network （Rayleigh, Raman, and Brillouin scattering） is a 3S （smart materials, smart structure, and smart skill） system, which is easy to co.struct smart fiber sensor networks. The distributed optical fiber sensor can be embedded in the power grids, railways, bridges, tunnels, roads, co.structions, water supply systems, dams, oil and gas pipelines and other

关键词： Distributed optical fiber sensor Raman scattering Rayleigh scattering Brillouin scattering fusionprinciple of optical fiber nonlinear scattering optical time domain reflectometry (OTDR)

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A new route to fabricate flexible,breathable co.posites with advanced thermal management capability for wearable electronics

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npj Flexible electronics 2023年第1期7卷 321-329页

作者： Huibao Chen Yafei Ding Guimei Zhu Yu Liu Qun Fang Xue Bai Yan Zhao Xin Li Xingyi Huang Tong-Yi Zhang Baowen Li Bin Sun co.lege of Physics Qingdao UniversityQingdao 266071PR China co.lege of electronics and Information Qingdao UniversityQingdao 266071PR China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055PR China School of Microelectronics Southern University of Science and TechnologyShenzhen 518055PR China School of Physical Education Qingdao UniversityQingdao 266071PR China Shenzhen Institute of Advanced electronic Materials Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055PR China co.lege of Textile and Clothing Engineering Soochow UniversitySuzhou 215123PR China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240PR China Materials Genome Institute Shanghai University200444 ShanghaiPR China Department of Physics and Shenzhen International Quantum AcademySouthern University of Science and TechnologyShenzhen 518055PR China Paul M Rady Department of Mechanical Engineering Department of PhysicsUniversity of ColoradoBoulderCO 80305-0427USA weihai Innovation Research Institute of Qingdao University Weihai 264200PR China

Wearable electronics with miniaturization and high-power density call for devices with advanced thermal management capabilities,outstanding flexibility,and excellent ***,it is difficult to achieve these goals simultaneously due to the co.flict between high thermal co.ductivity and permeability and ***,we report an approach to fabricate flexible,breathable co.posites with advanced thermal management capability by co.ting the boron nitride nanosheets(BNNSs)layer with high thermal co.ductivity on the grids of patterned electrospun thermoplastic polyurethane(TPU)fibrous *** co.posite exhibited a significant enhancement of thermal co.ductivity and preserved instinctive breathability *** the co.posite was integrated into flexible devices,its saturating operating temperature dropped significantly co.pared to that of pure Eco.lex ***,the surface temperature fluctuation was less than 0.5°C during more than 2000 cycles bendingreleasing ***,a prototype to fabricate wearable electronics with advanced thermal management capability was proposed.

关键词： thermal polyurethane boron

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An Empirical Research on Trade Liberalization and co. Emissions In China

An Empirical Research on Trade Liberalization and CO2 Emissi...

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2013教育技术与信息系统国际会议

作者： Zusha Gu Ying Gao co.g Li Business School Shandong University (Weihai)

This paper studies this relationship between free trade and carbon dioxide emissions by utilizing the time series data co.lected from the year 1981 to 2010. The study shows: there’s a long-term equilibrium relationship between trade liberalization and carbon dioxide emissions in China;a unidirectional causality exists from Foreign Trade Dependency to carbon dioxide emissions, while the causality between FDI Dependency and carbon dioxide emissions is bidirectional.

关键词： Trade Openness Carbon Dioxide Emissions Granger Causality Test

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Strategic Diagram Analysis Based on Knowledge Network——Taking Journal Articles on Environmental Effect of Trade for Example

Strategic Diagram Analysis Based on Knowledge Network——Tak...

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2013年教育技术与管理科学国际会议

作者： SHEN Jun LI Xiaoxia GU Zusha Business School Shandong University (weihai)

This paper, based on existing researches, taking journal articles on environmental effect of trade as research object to explore the field’s research status, hot spots and novel direction by applying co.word clustering analysis and strategic diagram. By taking the relevant literature in CNKI database as the data source, this study aims to form a co.prehensive understanding of the environmental effect of trade. The study suggests that carbon emission effect of trade and environmental effect of trade are the most novel research fields. In addition, the research on co.parative advantage of environment has aroused much attention although neither its research direction nor research co.tent is mature.

关键词： environmental effect of trade co.word analysis cluster analysis strategic diagram.

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