Enhancement in boiling heat transfer performance using reduced graphene oxide coating with controllable components and porous structures  

作　　者：XU ZhiMing WANG XiaoLiang JIANG HongPeng ZHANG ZhiRong SHAN DeBin GUO Bin QIU YunFeng XU Jie 

机构地区：[1]Key Laboratory of Micro-Systems and Micro-Structures Manufacturing of Ministry of Education,Harbin Institute of Technology,Harbin 150080,China [2]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China [3]School of Medicine and Health,Harbin Institute of Technology,Harbin 150080,China [4]School of Chemistry and Chemical Engineering,Yancheng Institute of Technology,Yancheng 224051,China

出　　处：《Science China(Technological Sciences)》2023年第7期2080-2092,共13页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51635005);the 111 Project(Grant No.B18017)。

摘　　要：Enhancement in boiling heat transfer performance is significant for addressing thermal management bottlenecks of advanced electronic systems.Reduced graphene oxides(rGO)are regarded as promising candidates for thermal management due to their excellent thermal properties,chemical stability and adjustable wettability.In this study,rGO coatings with micron pores and controllable oxygen contents are prepared on Al substrate via cathodic electrophoretic deposition and subsequent thermal annealing,leading to enhanced pool boiling performance.The heat transfer coefficient for Al/rGO450is 37.2 kW m-2K-1,which is increased by 112.6%compared with bare Al,also outperformed previously reported Al based substrates.It is assumed that the hydrophilic and aerophobic r GO coatings effectively promote the liquid infiltration and bubble departure during pool boiling process.Importantly,repeatability tests indicate the durable stability of vertically oriented rGO nanosheets.Reverse nonequilibrium molecular dynamics simulation indicates that the interfacial transmission coefficients of Al/rGO increase after thermal annealing,indicative of the enhanced heat transfer performance of heterogeneous interface.Our study opens a new avenue for endowing metal substrates with high pool boiling performance using porous carbon coating nanoengineering strategy with controllable morphology and components.

关 键 词：GRAPHENE cathodic electrophoretic deposition boiling heat transfer thermal reduction interfacial nanoengineering 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TK124[金属学及工艺—金属学]