RT Journal Article
T1 PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets
A1 Marcos, Marco A.
A1 Cabaleiro, David
A1 García Guimarey, María Jesús
A1 Pérez Comuñas, María José
A1 Fedele, Laura
A1 Fernández Pérez, Josefa
A1 Lugo, Luis
K1 Graphene nanoplatelets
K1 Poly(ethylene glycol)
K1 NePCM
K1 Solid-liquid phase change
K1 Thermal conductivity
K1 Dynamic viscosity
K1 Volumetric behaviour
AB This study presents new Nano-enhanced Phase Change Materials, NePCMs, formulated as dispersions of functionalized graphene nanoplatelets in a poly(ethylene glycol) with a mass-average molecular mass of 400 g·mol−1 for possible use in Thermal Energy Storage. Morphology, functionalization, purity, molecular mass and thermal stability of the graphene nanomaterial and/or the poly(ethylene glycol) were characterized. Design parameters of NePCMs were defined on the basis of a temporal stability study of nanoplatelet dispersions using dynamic light scattering. Influence of graphene loading on solid-liquid phase change transition temperature, latent heat of fusion, isobaric heat capacity, thermal conductivity, density, isobaric thermal expansivity, thermal diffusivity and dynamic viscosity were also investigated for designed dispersions. Graphene nanoplatelet loading leads to thermal conductivity enhancements up to 23% while the crystallization temperature reduces up to in 4 K. Finally, the heat storage capacities of base fluid and new designed NePCMs were examined by means of the thermophysical properties through Stefan and Rayleigh numbers. Functionalized graphene nanoplatelets leads to a slight increase in the Stefan number.
PB MDPI
YR 2018
FD 2018
LK http://hdl.handle.net/10347/22750
UL http://hdl.handle.net/10347/22750
LA eng
NO Marcos, M.A.; Cabaleiro, D.; Guimarey, M.J.G.; Comuñas, M.J.P.; Fedele, L.; Fernández, J.; Lugo, L. PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets. Nanomaterials 2018, 8, 16
NO This work was supported by the “Ministerio de Economía y Competitividad” (Spain) and theFEDER program through the ENE2014-55489-C2-2-R and ENE2014-55489-C2-1-R Projects. Authors acknowledgethe financial support by the Xunta de Galicia through GRC ED431C 2016-034, GRC ED431C 2016/001 andAGRUP2015/11 Programs. D.C. was recipient of a postdoctoral fellowship from Xunta de Galicia (Spain)
DS Minerva
RD 28 abr 2026