Design of a graphene oxide@melamine foam/polyaniline@erythritol composite phase change material for thermal energy storage  

作　　者：Jianhui Zhou Xin Lai Jianfeng Hu Haijie Qi Shan Liu Zhengguo Zhang 

机构地区：[1]State Key Laboratory of Advance Power Transmission Technology(State Grid Smart Grid Research Institute Co.Ltd.),Beijing 102209,China [2]School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第6期282-290,共9页中国化学工程学报（英文版）

基　　金：supported by the State Key Laboratory of Advanced Power Transmission Technology(GEIRI-SKL-2021-014)。

摘　　要：At present,only a single modification method is adopted to improve the shortcomings of erythritol(ET)as a phase change material(PCM).Compared with a single modification method,the synergistic effect of multiple modification methods can endow ET with comprehensive performance to meet the purpose of package,supercooling reduction,and enhancement of thermal conductivity.In this work,we innovatively combine graphene oxide(GO)nanosheet modified melamine foam(MF)and polyaniline(PANI)to construct a novel ET-based PCM by blending and porous material adsorption modification.PANI as the nucleation center can enhance the crystallization rate,thereby reducing the supercooling of ET.Meanwhile,GO@MF foam can not only be used as a porous support material to encapsulate ET but also as a heat conduction reinforcement to improve heat storage and release rate.As a result,the supercooling of GO@MF/PANI@ET(GMPET)composite PCM decreases from 91.2℃ of pure ET to 57.9℃ and its thermal conductivity(1.58 W·m^(-1)·K^(-1))is about three times higher than that of pure ET(0.57 W·m^(-1)·K^(-1)).Moreover,after being placed at 140℃ for 2 h,there is almost no ET leakage in the GMPET composite PCM,and the mass loss ratio is less than 0.75%.In addition,the GMPET composite PCM displays a high melting enthalpy of about 259 J·g^(-1) and a high initial mass loss temperature of about 198℃.Even after the 200th cycling test,the phase transition temperature and the latent heat storage capacity of the GMPET PCM all remain stable.This work offers an effective and promising strategy to design ET-based composite PCM for the field of energy storage.

关 键 词：Composites ENTHALPY Heat conduction NUCLEATION Phase change 

分 类 号：TB34[一般工业技术—材料科学与工程]