• 文献标题:   Polyethylene Glycol Based Graphene Aerogel Confined Phase Change Materials with High Thermal Stability
  • 文献类型:   Article
  • 作  者:   FU Y, XIONG WL, WANG JY, LI JH, MEI T, WANG XB
  • 作者关键词:   polyethylene glycol, graphene aerogel, phase change material, thermal stability
  • 出版物名称:   JOURNAL OF NANOSCIENCE NANOTECHNOLOGY
  • ISSN:   1533-4880 EI 1533-4899
  • 通讯作者地址:   Hubei Univ
  • 被引频次:   3
  • DOI:   10.1166/jnn.2018.14635
  • 出版年:   2018

▎ 摘  要

Polyethylene glycol (PEG) based graphene aerogel (GA) confined shaped-stabilized phase change materials (PCMs) are simply prepared by a one-step hydrothermal method. Three-dimensional GA inserted by PEG molecule chains, as a supporting material, obtained by reducing graphene oxide sheets, is used to keep their stabilized shape during a phase change process. The volume of GA is obviously expended after adding PEG, and only 9.8 wt% of GA make the composite achieve high energy efficiency without leakage during their phase change because of hydrogen bonding widely existing in the GA/PEG composites (GA-PCMs). The heat storage energy of GA-PCMs is 164.9 J/g, which is 90.2% of the phase change enthalpy of pure PEG. In addition, this composite inherits the natural thermal properties of graphene and thus shows enhanced thermal conductivity compared with pure PEG. This novel study provides an efficient way to fabricate shape-stabilized PCMs with a high content of PEG for thermal energy storage.