Structure,Characterization and Thermal Properties of the Form-Stable Paraffin/High-Density Polyethylene/Expanded Graphite/Epoxy Resin Composite PCMs for Thermal Energy Storage  

作　　者：MOMBEKI PEA Hamir Johan AN Zhoujian DU Xiaoze SHI Tianlu ZHANG Dong 

机构地区：[1]School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,730050,China [2]Key Laboratory of Complementary Energy System of Biomass and Solar Energy,Gansu Province,Lanzhou,730050,China

出　　处：《Journal of Thermal Science》2023年第6期2104-2114,共11页热科学学报(英文版)

基　　金：This research was financially supported by the National Natural Science Foundation of China(52206087,52130607);the Natural Science Foundation of Gansu Province,China(20JR10RA193);the Industrial Support Plan Project of Gansu Provincial Education Department(2022CYZC-21,2021CYZC-27);the Doctoral Research Funds of Lanzhou University of Technology(061907);the Red Willow Excellent Youth Project of Lanzhou University of Technology.

摘　　要：The form-stable paraffin/high-density polyethylene/expanded graphite/epoxy resin composite phase change materials(CPCMs),exhibiting suitable thermal properties,including low melting temperature,high conductivity and high phase change enthalpy,was developed in this work.Herein,paraffin(PA)was utilized as a core PCM.High-density polyethylene(HDPE)was utilized for the shape stabilization and preventing the PCMs leakage.Expanded graphite(EG)was used to increase its thermal conductivity and act also in the porous supporting material.Epoxy resin(ER)was used to provide flexible encapsulated scaffold morphology and keep a highly tight network structure of the PCMs.However,the physical architecture,the chemical architecture and thermal behavior properties of specimens were investigated by using the spectroscopy and calorimetry techniques.The scanning electron microscope(SEM),X-ray diffraction(XRD)and fourier transform infrared spectrometer FTIR tests have shown good uniformity structure and good compatibility of components.In addition,the thermal conductivity tests revealed that the thermal conductivity of PA,initially 0.31 W/(m·K)improved up to 1.9 times by adding the 6 wt%mass fraction of EG in composite PCMs.Furthermore,the differential scanning calorimeter(DSC)measurements indicated that PA melting enthalpy,initially 231 J/g decreased up to 125 J/g with the increase of the amount of HDPE which was due to the limitation caused by the atomic network constructed by the base material.The thermogravimetric analyzer(TGA)and leakage-proof revealed the enhancement of the degradation of PA with the raise of amount of the HDPE into the CPCMs.Therefore,the proposed form-stable CPCMs are a great candidate for the thermal regulation and thermal energy storage employment.

关 键 词：form-stable CPCMs PARAFFIN expanded graphite high density polyethylene epoxy resin thermal energy storage 

分 类 号：TK02[动力工程及工程热物理]