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Propulsion and Power Research 2021年第1期10卷 83-94页

作者： Michael O.Oni Basant K.Jha Department of Mathematics Ahmadu Bello UniversityZariaNigeria

The impact of joule heating due to electric double layer(EDL)and viscous dissipation on electroosmotic mixed convection flow in a vertical microchannel with asymmetric heat fluxes is established in this *** Poisson-Boltzmann,momentum and energy equations representing the electric potential,velocity profile and temperature distribution in the microchannel are obtained in dimensionless *** the Debye-Hückel linearization,exact solutions are obtained for electric potential,velocity profile and temperature distributions by method of undetermined coefficients in the absence of viscous dissipation and joule heating while an inbuilt Matlab function called pdepe is employed to solve the coupled nonlinear momentum and energy equations in the presence of joule heating and viscous *** show that the presence of joule heating and viscous dissipation lead to decrease in velocity profile and temperature distributions throughout the microchannel.

关键词： Electroosmotic flow Vertical microchannel joule heating Heat flux Viscous dissipation

Graphene/SiC-coated textiles with excellent electromagnetic interference shielding,joule heating,high-temperature resistance,and pressure-sensing performances

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Journal of Advanced Ceramics 2023年第4期12卷 778-791页

作者： Chongjie Wang Qingfang Xu Jinrong Hu Pengjan Lu Han Wu Bingian Guo Rong Tu Kai Liu Meijun Yang Song Zhang Bao-Wen Li Chuanbin Wang Lianmeng Zhang School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Wuhan Tuocai Technology Co. Ltd.Ezhou 436032China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou 521000China Zhejiang MTCN Technology Co. Ltd.Huzhou 311103China Wuhan University of Technology Advanced Engineering Technology Research Institute of Zhongshan City Zhongshan 528400China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Multifunctional,wearable,and durable textiles integrated with smart electronics have attracted tremendous ***,it remains a great challenge to balance new functionalities with high-temperature ***,textile-based pressure sensors with excellent electromagnetic interference(EMI)shielding,joule heating,and high-temperature resistance were fabricated by constructing graphene/SiC(G/SiC)heterostructures on carbon cloth via laser chemical vapor deposition(LCVD).The resultant textiles exhibited excellent EMI efficiency of 74.2 dB with a thickness of 0.45 mm,joule heating performance within a low working voltage(V)range of 1-3 V,and fast response time within 20 *** properties arose from multiple reflections,interfacial polarization,and high conductivity due to the numerous amounts of nanoscale G/SiC *** importantly,G/SiC/carbon fibers(CFs)demonstrated well high-temperature resistance with a heat resistance index(THri)of 380.2 C owing to the protection of a coating layer on the CFs upon ***,the G/SiC/CFs presented good pressure-sensing performance with high sensitivity(S)of 52.93 kPal,fast response time of 85 ms,and a wide pressure range of up to 186 *** features imply the potential of the G/SiC/CFs as efficient EMI shielding,electrical heater,and piezoresistive sensor textiles.

关键词： graphene/SiC(G/SiC) electromagnetic interference(EMI)shielding joule heating pressure-sensing high-temperature resistance

Highly conductive calcium ion-reinforced MXene/sodium alginate aerogel meshes by direct ink writing for electromagnetic interference shielding and joule heating

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Journal of Materials Science & Technology 2023年第4期135卷 213-220页

作者： Cheng-Zhang Qi Xinyu Wu Ji Liu Xin-Jie Luo Hao-Bin Zhang Zhong-Zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry CRANN and AMBERTrinity College DublinD2DublinIreland

Although MXene sheets possess high electrical conductivity and rich surface chemistry and are well suit-able for fabricating electrically conductive nanocomposites for electromagnetic interference(EMI)shield-ing applications,it remains challenging for MXene nanocomposites to achieve tunable EMI shielding per-formances and customized ***,an aqueous MXene/sodium alginate ink is developed to print aerogel meshes with customized geometries using a direct ink writing *** ion-enhanced strategy is proposed to reinforce the printed aerogel meshes by multi-level *** resultant 3D printed aerogel mesh exhibits an ultrahigh electrical conductivity of 2.85×10^(3)S m^(−1),outstanding mechanical properties,and excellent structural stability in wet *** importantly,a wide range of tunable EMI shielding efficiencies from 45 to 100 dB is achieved by the structural design of the 3D printed ion-enhanced MXene/sodium alginate aerogel *** a joule heater,in addition,the printed aerogel meshes can achieve a wide temperature range of 40-135℃at low driving *** work demonstrates a direct ink writing approach for the fabrication of ion-enhanced MXene/sodium al-ginate aerogel meshes with tunable EMI shielding properties and multi-functionalities for applications in many scenarios.

关键词： MXene inks Aerogels Electromagnetic interference shielding Direct ink writing joule heating

Ultrafast joule heating synthesis of hierarchically porous graphene-based Co-N-C single-atom monoliths

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Nano Research 2022年第5期15卷 3913-3919页

作者： Lingli Xing Rui Liu Zhichao Gong Jingjing Liu Jianbin Liu Haisheng Gong Kang Huang Huilong Fei Advanced Catalytic Engineering Research Center of the Ministry of Education State Key Laboratory for Chemo/Biosensing and Chemometricsand College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Herein,we develop a transient heating-quenching strategy triggered by joule heating for the synthesis of single-atom cobalt-and nitrogen-doped graphene materials with three-dimensional porous monolithic architecture(denoted as CoNG-JH).The ultrafast joule heating procedure simultaneously enables the reduction of graphene oxide and the incorporation of metal and nitrogen atoms into the graphene matrix within 2-second ***,the transient quenching avoids the extended heating-induced atom aggregation,ensuring the rapid and stable dispersion of atomic-scale CoNx active sites in ***,the interconnected macropores and nanopores formed by the self-assembly of graphene sheets facilitate the unimpeded ion and gas transport during the catalytic *** used as an electrode for the hydrogen evolution reaction(HER),the fabricated free-standing CoNG-JH exhibits high catalytic activity and durability with a low overpotential of 106 mV at 10 mA·cm^(-2) and a small Tafel slope of 66 mV·dec^(-1) in 0.5 M H_(2)SO_(4) *** presented synthesis and design strategy open up a rapid and facile route for the manufacturing of single atom catalysts.

关键词： joule heating single atom catalysts hierarchically porous structure self-supporting film hydrogen evolution reaction

Ultra-thin robust CNT@GC film integrating effective electromagnetic shielding and flexible joule heating

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Nano Research 2024年第5期17卷 3462-3471页

作者： Ding Zhang Chunhui Wang Meng Li Weixue Meng Shipeng Zhang Mengdan Yang Xinguang Huang Yingjiu Zhang Yuanyuan Shang Anyuan Cao Key Laboratory of Materials Physics(Ministry of Education) School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou450052China Electron Microscopy Center Yunnan UniversityKunming650091China School of Materials Science and Engineering Peking UniversityBeijing100871China

The demand for lightweight,thin electromagnetic interference(EMI)shielding film materials with high shielding effectiveness(SE),excellent mechanical properties,and stability in complex environments is particularly pronounced in the realm of flexible and portable electronic ***,we developed an ultra-thin film(CNT@GC)in which the glassy carbon(GC)layer wrapped around and welded carbon nanotubes(CNTs)to form a core-shell network structure,leading to exceptional tensile strength(327.2 MPa)and electrical conductivity(2.87×10^(5) S·m^(−1)).The CNT@GC film achieved EMI SE of 60 dB at a thickness of 2µm after post-acid treatment and high specific SE of 3.49×10^(5) dB·cm^(2)·g^(−1),with comprehensive properties surpassing those of the majority of previous shielding ***,the CNT@GC film exhibited joule heating capability,reaching a surface temperature of 135℃at 3 V with a fast thermal response of about 0.5 s,enabling anti-icing/de-icing *** work presented a methodology for constructing a robust CNT@GC film with high EMI shielding performance and exceptional joule heating capability,demonstrating immense potential in wearable devices,defense,and aerospace applications.

关键词： core-shell structure ultra-thin lightweight film robust film electromagnetic shielding joule heating

Flexible mille-feuille structure electromagnetic interference shielding film with excellent thermal conductivity and joule heating

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Nano Research 2024年第5期17卷 4544-4554页

作者： Dingwen Yin Huijuan Xiu Simin Wang Yanfei Pan Na Li Rui Cheng Shaoyan Huang Sha Fan Jinbao Li College of Bioresources Chemical&Materials Engineering Shaanxi University of Science&TechnologyXi'an 710021China National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper DevelopmentXi'an 710021China College of Material Science and Art Design Inner Mongolia Agricultural UniversityHohhot 010018China

The intelligent electronic devices have urgent demands for electromagnetic interference(EMI)shielding films with excellent heat dissipation ***,it is challenging to obtain excellent EMI shielding and thermal conductivity performances ***,inspired by mille-feuille structure,the multifunctional EMI shielding films developed by a layer-by-layer self-assembly and hot-pressing *** ingenious introduction of silver nanoparticles(AgNPs)with large specific surface area and highly conductive into the network formed by TEMPO-oxidized cellulose nanofibrils(TOCNFs)with large aspect ratio to form the TOCNFs/*** the graphene nanoplates(GNPs)with high conductivity loss distributed alternately with TOCNFs/AgNPs to construct mille-feuille structure,which had highly efficient conductive network,complete thermally conduction pathway and rich heterogeneous ***,the designed films presented high electrical conductivity of 8520 S/cm,superb EMI effectiveness(SE)of 98.05 dB,and excellent thermal conductivity of 18.82 W/(m·K).Furthermore,the films possessed outstanding joule heating performances with low voltages,including high heating temperature(100℃),fast response time(heating stability and ***,such high-performance EMI shielding films with fascinating thermal conductivity and joule heating performances have substantial application in flexible electronics,electromagnetic waves shielding and thermal management.

关键词： TEMPO-oxidized cellulose nanofibrils/silver nanoparticles(TOCNFs/AgNPs) mille-feuille structure electromagnetic interference shielding thermal conductivity joule heating

Effects of thermal boundary conditions on the joule heating of electrolyte in a microchannel

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Journal of Hydrodynamics 2016年第5期28卷 850-862页

作者： M. Y. ABDOLLAHZADEH JAMALABADI J. H. PARK M. M. RASHIDI J. M. CHEN Department of Ship Engineering Chabahar Maritime University Chabahar Iran Department of Aerospace and System Engineering Gyeongsang National University Jinju Korea . Engineering Faculty of Bu-Ali Sina University Hamedan Iran Department of Mechanical and Nuclear Engineering Kansas State University Manhattan USA

joule heating effects on a slit microcharmel filled with electrolytes are comprehensively investigated with emphasis on the thermal boundary conditions. An accurate analytical expression is proposed for the electrical field and the temperature distributions due to joule heating are numerically obtained from the energy balance equation. The results show that a thermal design based on the average electric potential difference between electrodes can cause severe underestimation of joule heating. In addition, the parame- tric study of thermal boundary conditions gives us an insight into the best cooling scenario for microfluidic devices. Other significant thermal characteristics, including Nusselt number, thermophoretic force, and entropy generation, are discussed as well. This study will provide useful information for the optimization of a bioMEMS device in relation to the thermal aspect.

关键词： microchannel electrolyte joule heating Nusselt number thermophoretic force entropy generation optimized thermaldesign

Janus(BNNS/ANF)-(AgNWs/ANF)thermal conductivity composite films with superior electromagnetic interference shielding and joule heating performances

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Nano Research 2022年第5期15卷 4747-4755页

作者： Yixin Han Kunpeng Ruan Junwei Gu Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Highly thermal conductivity materials with excellent electromagnetic interference shielding and joule heating performances are ideal for thermal management in the next generation of communication industry,artificial intelligence and wearable *** this work,silver nanowires(AgNWs)are prepared using silver nitrate as the silver source and ethylene glycol as the solvent and reducing agent,and boron nitride(BN)is performed to prepare BN nanosheets(BNNS)with the help of isopropyl alcohol and ultrasonication-assisted peeling method,which are compounded with aramid nanofibers(ANF)prepared by chemical dissociation,respectively,and the(BNNS/ANF)-(AgNWs/ANF)thermal conductivity and electromagnetic interference shielding composite films with Janus structures are prepared by the"vacuum-assisted filtration and hot-pressing"***(BNNS/ANF)-(AgNWs/ANF)composite films exhibit"one side insulating,one side conducting"performance,the surface resistivity of the BNNS/ANF surface is 4.7×10^(13) Ω,while the conductivity of the AgNWs/ANF surface is 5,275 S/*** Janus(BNNS/ANF)-(AgNWs/ANF)composite film with thickness of 95 pm has a high in-plane thermal conductivity coefficient of 8.12 W/(m·K)and superior electromagnetic interference shielding effectiveness of 70 *** obtained composite film also has excellent tensile strength of 122.9 MPa and tensile modulus and 2.7 *** also has good temperature-voltage response characteristics(high joule heating temperature at low supply voltage(5 V,215.0℃),fast response time(10 s)),excellent electrical stability and reliability(stable and constant real-time relative resistance under up to 300 cycles and 1,500 s of tensile-bending fatigue work tests).

关键词： thermal conductivity composite film Janus structure aramid nanofibers electromagnetic interference shielding performance joule heating

Entropy generation applications in flow of viscoelastic nanofluid past a lubricated disk in presence of nonlinear thermal radiation and joule heating

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Communications in Theoretical Physics 2021年第9期73卷 37-50页

作者： Aamar Abbasi Waseh Farooq M Ijaz Khan Sami Ullah Khan Yu-Ming Chu Zahid Hussain M Y Malik Department of Mathematics University of Azad Jammu and Kashmir Muzaffarabad13100 Pakistan Department of Mathematics and Statistics Riphah International University I-14Islamabad 44000Pakistan Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Department of Mathematics Huzhou UniversityHuzhou 313000China Department of Mathematics College of SciencesKing Khalid UniversityAbha 61413Saudi Arabia

Entropy generation is the loss of energy in thermodynamical systems due to resistive forces,diffusion processes,radiation effects and chemical *** main aim of this research is to address entropy generation due to magnetic field,nonlinear thermal radiation,viscous dissipation,thermal diffusion and nonlinear chemical reaction in the transport of viscoelastic fluid in the vicinity of a stagnation point over a lubricated *** conservation laws of mass and momentum along with the first law of thermodynamics and Fick’s law are used to discuss the flow,heat and mass transfer,while the second law of thermodynamics is used to analyze the entropy and *** numbers of independent variables in the modeled set of nonlinear partial differential equations are reduced using similarity variables and the resulting system is numerically approximated using the Keller box *** effects of thermophoresis,Brownian motion and the magnetic parameter on temperature are presented for lubricated and rough *** local Nusselt and Sherwood numbers are documented for both linear and nonlinear thermal radiation and lubricated and rough *** representations of the entropy generation number and Bejan number for various parameters are also shown for lubricated and rough *** concentration of nanoparticles at the lubricated surface reduces with the magnetic parameter and Brownian *** entropy generation declines for thermophoresis diffusion and Brownian motion when lubrication effects are *** is concluded that both entropy generation and the magnitude of the Bejan number increase in the presence of *** current results present many applications in the lubrication phenomenon,heating processes,cooling of devices,thermal engineering,energy production,extrusion processes etc.

关键词： entropy generation viscoelastic fluid lubricated surface nonlinear thermal radiation joule heating Keller box method

Direct ink writing of multifunctional gratings with gel-like MXene/norepinephrine ink for dynamic electromagnetic interference shielding and patterned joule heating

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Nano Research 2024年第3期17卷 1585-1594页

作者： Pei-Zhu Jiang Zhiming Deng Peng Min Lvxuan Ye Cheng-Zhang Qi Hao-Yu Zhao Ji Liu Hao-Bin Zhang Zhong-Zhen Yu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Organic-Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China School of Chemistry CRANN and AMBERTrinity College DublinDublin D02PN40Ireland

Intelligent electromagnetic interference(EMI)shielding modulators with a wide tuning range and cyclic stability are urgently needed but their fabrication remains challenging.A gel-like MXene/norepinephrine ink is developed and multifunctional MXene gratings with wide EMI shielding effectiveness(SE)tuning range,superior reversibility,and high mechanical flexibility are constructed by direct ink writing approach for dynamic EMI shielding and patterned joule heating *** modulable MXene/norepinephrine grating with a high conductivity of 3510 S·cm-1 can conveniently realize the seamless modulation of the EMI SE by adjusting the angle between the MXene grating filaments and the electric field of the incident electromagnetic waves,offering highly reversible switching between shielding“On”(28.0 dB)and“Off”(0.5 dB)***,due to the optimized integration of the MXene ink and the rationally designed pattern,a superior specific EMI SE of 95,688.2 dB·cm^(2)·g^(-1) is achieved in the“On”***,the MXene/norepinephrine ink can be used to fabricate many complex patterned gratings with superior stability,instant responsibility,and superb mechanical flexibility,exhibiting a unique patterned joule heating *** writing of multifunctional gratings paves a means for developing intelligent EMI shielding materials,wearable electronic devices,and advanced thermal management materials.

关键词： MXene ink direct ink writing electromagnetic interference shielding multifunctional gratings joule heating