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Surfactant-assisted fabrication of graphene frameworks endowing epoxy composites with superior thermal conductivity

查看全文 作　　者：Fan [1,2]Zhang;Chen [2,3]Ye;Wen [2,3]Dai;Le [2]Lv;Qilong [2,4]Yuan;Kuan [4,5]W.A.Chee;Ke [2,3]Yang;Nan [2,3]Jiang;Cheng-Te [2,3]Lin;Zhaolin [1]Zhan;Dan [2,3]Dai;He [2,3]Li 高影响力作者 机构地区：[1]Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;[2]Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;[3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;[4]Department of Electrical and Electronic Engineering,Faculty of Science and Engineering,University of Nottingham Ningbo China,Ningbo 315100,China;[5]Laser Research Institute,Shandong Academy of Sciences,Qingdao 226100,China高影响力机构 出　　处：《Chinese Chemical Letters》索引2020年第31卷第1期,共5页高影响力期刊 基　　金：financial support by the National Key R&D Program of China (No.2017YFB0406000);Scientific Instrument Developing Project of the Chinese Academy of Sciences (No.YZ201640);the Project of the Chinese Academy of Sciences (No.KFZD-SW-409);Science and Technology Major Project of Ningbo (Nos.2016S1002 and 2016B10038);International S&T Cooperation Program of Ningbo (No. 2017D10016) for financial support;the Chinese Academy of Sciences for Hundred Talents Program;Chinese Central Government for Thousand Young Talents Program;3315 Program of Ningbo;the Key Technology of Nuclear Energy (CAS Interdisciplinary Innovation Team,2014) 摘　　要：With the rapid growth in electronic device performance,there has been an increasing demand for thermally conductive polymer composites to handle the thermal management issue,thus contributing to the great importance to develop the graphene framework,which is evaluated as the most promising reinforcements for enhancing the thermal conductivity of polymer.Vacuum filtration is a common method to fabricate graphene framework,whereas,it is available to prepare a framework with centimeter-scale thickness by filtrating the graphene-water dispersion,due to the fact of sample cracking caused by the mismatch of surface tension between graphene and water.In this work,a surfactantassisted strategy was proposed by adjusting the surface tension of the water close to that of graphene first,then performing a conventional filtration process,to fabricate graphene framework.As a result,a thick graphene framework(thickness:3 cm)was successfully prepared,and after embedding into epoxy,the framework endows the composite(13.6 wt%)with a high in-plane thermal conductivities of12.4 W/mK,which is equivalent to≈64 times higher than that of neat epoxy.Our method is simple and compatible with the conventional filtration process,suggesting great potential for the mass-production of graphene framework to meet the practical application requirements. 关 键 词：Graphene framework SURFACTANT Vacuum filtration Thermal conductivity Polymer composite
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