With the innovation of microelectronics technology,the heat dissipation problem inside the device will face a severe test.In this work,cellulose aerogel(CA)with highly enhanced thermal conductiv-ity(TC)in vertical planes was successfully obtained by constructing a vertically aligned silicon carbide nanowires(SiC NWs)/boron nitride(BN)network via the ice template-assisted strategy.The unique net-work structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W m-1 K-1 at a low hybrid filler loading of 16.69 wt％,which was increased by 890％compared to pure epoxy(EP).In addition,relying on unique porous network structure of CA,EP-based composite also showed higher TC than other comparative samples in the horizontal direction.Meanwhile,the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35×1011 Q cm and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of-21.5 dB and a wide effective absorption bandwidth(＜-10 dB)from 8.8 to 11.6 GHz.Therefore,this work provides a new strat-egy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications.

Duo Pan;Gui Yang;Hala M.Abo-Dief;Jingwen Dong;Fengmei Su;Chuntai Liu;Yifan Li;Ben Bin Xu;Vignesh Murugadoss;Nithesh Naik;Salah M.El-Bahy;Zeinhom M.El-Bahy;Minan Huang;Zhanhu Guo

Key Laboratory of Materials Processing and Mold(Zhengzhou University),Ministry of Education;Mechanical and Construction Engineering,Faculty of Engineering and Environment,Northumbria University,Newcastle upon Tyne NE1 8ST,UK;National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450002,People's Republic of China;Department of Chemistry,College of Science,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia;Integrated Composites Laboratory(ICL),Department of Chemical and Biomolecular Engineering,University of Tennessee,Knoxville,TN 37996,USA;College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,People's Republic of China;Department of Mechanical and Manufacturing Engineering,Manipal Institute of Technology,Manipal Academy of Higher Education,Manipal,Karnataka 576104,India;Department of Chemistry,Turabah University College,Taif University,P.O.Box 11099,Taif 21944,Saudi Arabia;Advanced Materials Division,Engineered Multifunctional Composites(EMC)Nanotech LLC,Knoxville,TN 37934,USA

纳微快报（英文）

[1]Duo Pan;Gui Yang;Hala M.Abo-Dief;Jingwen Dong;Fengmei Su;Chuntai Liu;Yifan Li;Ben Bin Xu;Vignesh Murugadoss;Nithesh Naik;Salah M.El-Bahy;Zeinhom M.El-Bahy;Minan Huang;Zhanhu Guo-.Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites)[J].纳微快报（英文）,2022(07):209-227

Vertically,Aligned,Silicon,Carbide,Nanowires,Boron,Nitride,Cellulose,Aerogel,Networks,Enhanced,Thermal,Conductivity,Electromagnetic,Absorbing,Epoxy,Composites,With,innovation,microelectronics,technology,heat,dissipation,problem,inside,device,will,face,severe,test,In,this,cellulose,aerogel,CA,highly,enhanced,thermal,conductiv,planes,was,successfully,obtained,by,constructing,vertically,aligned,silicon,carbide,nanowires,SiC,NWs,boron,nitride,BN,network,via,template,assisted,strategy,unique,structure,connected,ensures,that,direction,reaches,low,hybrid,filler,loading,wt,which,increased,compared,pure,epoxy,EP,addition,relying,porous,also,showed,higher,than,other,comparative,samples,horizontal,Meanwhile,exhibits,good,electrically,insulating,volume,resistivity,about,displays,excellent,electromagnetic,wave,absorption,minimum,reflection,loss,dB,wide,effective,bandwidth,from,GHz,Therefore,provides,new,manufacturing,polymer,composites,multifunctional,performances,packaging,applications

0.726419