Nacre-bionic nanocomposite membrane for efficient in-plane dissipation heat harvest under high temperature  

作　　者：Jiemin Wang Dan Liu Quanxiang Li Cheng Chen Zhiqiang Chen Minoo Naebe Pingan Song David Portehault Christopher J.Garvey Dmitri Golberg Weiwei Lei 

机构地区：[1]Institute for Frontier Materials,Deakin University,Waurn Ponds Campus,Locked Bag 20000,Victoria,3220,Australia [2]Center for Future Materials,University of Southern Queensland,Toowoomba,4350,Australia [3]Sorbonne Universite,CNRS,Laboratoire de Chimie de La Matiere Condensee de Paris(CMCP),4 Place Jussieu,F-75005,Paris,France [4]Australia Nuclear Science and Technology Organization(ANSTO),Sydney,New South Wales,2232,Australia [5]Centre for Materials Science and School of Chemistry and Physics,Queensland University of Technology(QUT),Brisbane,QLD,4001,Australia

出　　处：《Journal of Materiomics》2021年第2期219-225,共7页无机材料学学报（英文）

基　　金：This work was financially supported by the Australian Research Council Discovery Program(DP190103290);Australian Research Council Discovery Early Career Researcher Award scheme(DE150101617 and DE140100716);We also thank the Australian Synchrotron for the SAXS/WAXS beamline(Beam time ID:M13292);D.G.is grateful to the Australian Research Council Laureate Fellowship FL160100089 and QUT Project No.323000-0355/51.

摘　　要：Waste heat management holds great promise to create a sustainable and energy-efficient society as well as contributes to the alleviation of global warming.Harvesting and converting this waste heat in order to improve the efficiency is a major challenge.Here we report biomimetic nacre-like hydroxyl-functionalized boron nitride(BN)-polyimide(PI)nanocomposite membranes as efficient 2D in-plane heat conductor to dissipate and convert waste heat at high temperature.The hierarchically layered nanostructured membrane with oriented BN nanosheets gives rise to a very large anisotropy in heat transport properties,with a high in-plane thermal conductivity(TC)of 51 Wm^(-1) K^(-1) at a temperature of~300 C,7314%higher than that of the pure polymer.The membrane also exhibits superior thermal stability and fire resistance,enabling its workability in a hot environment.In addition to cooling conventional exothermic electronics,the large TC enables the membrane as a thin and 2D anisotropic heat sink to generate a large temperature gradient in a thermoelectric module(△T=23 ℃)through effective heat diffusion on the cold side under 220 C heating.The waste heat under high temperature is therefore efficiently harvested and converted to power electronics,thus saving more thermal energy by largely decreasing consumption.

关 键 词：Boron nitride nanosheets Nanocomposite membrane Nacre-biomimetic High temperature heat spreader In-plane dissipation heat 

分 类 号：TB33[一般工业技术—材料科学与工程]