• 文献标题:   Experimental research and molecular dynamics simulation on thermal properties of capric acid/ethylene-vinyl/graphene composite phase change materials
  • 文献类型:   Article
  • 作  者:   GU Y, JIANG LH, JIN WZ, WEI ZH, LIU X, GUO MZ, XIA KL, CHEN L
  • 作者关键词:   composite phase change material, ethylenevinyl acetate, molecular dynamic simulation, thermal propertie
  • 出版物名称:   JOURNAL OF INDUSTRIAL ENGINEERING CHEMISTRY
  • ISSN:   1226-086X EI 1876-794X
  • 通讯作者地址:  
  • 被引频次:   8
  • DOI:   10.1016/j.jiec.2021.04.039 EA MAY 2021
  • 出版年:   2021

▎ 摘  要

In this paper, a new series of phase change materials (PCMs) composed of capric acid/ethylene-vinyl acetate/graphene (CA/EVA/GR) were prepared and thermal properties were investigated using molecular dynamics simulation. The composite PCMs were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and thermal conductivity measurement. FT-IR, XRD and SEM results manifest that CA can be successfully wrapped by EVA and GR additives, and there is no chemical reaction between CA, EVA and GR. DSC results indicate that adding GR into CA/EVA can result in composite PCMs maintain the high latent heat, while too much GR will cause a significant reduction in latent heat. Thermal conductivity obtained from experimental tests reveal that GR can gradually enhance the thermal conductivity of CA/ EVA with increasing dosage of GR. The experimental results of thermal conductivity fall close to that of molecular dynamics (MD) simulation at GR dosages below 1.8 wt%, but the experimental results present a trend which is contrary to MD simulation at higher GR dosages. The mean square displacement (MSD) results manifest that composite PCMs containing 1.8 wt% GR has the highest diffusion coefficient, while higher GR dosage will reduce the diffusion coefficient gradually. (c) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.