PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets
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, mol...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/8/1/16 |
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| author | Marco A. Marcos David Cabaleiro María J. G. Guimarey María J. P. Comuñas Laura Fedele Josefa Fernández Luis Lugo |
| author_facet | Marco A. Marcos David Cabaleiro María J. G. Guimarey María J. P. Comuñas Laura Fedele Josefa Fernández Luis Lugo |
| author_sort | Marco A. Marcos |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-13T20:01:12Z |
| format | Article |
| id | doaj.art-6a455de4c28c42a0b82b529bb781576c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-13T20:01:12Z |
| publishDate | 2017-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-6a455de4c28c42a0b82b529bb781576c2022-12-22T02:32:12ZengMDPI AGNanomaterials2079-49912017-12-01811610.3390/nano8010016nano8010016PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene NanoplateletsMarco A. Marcos0David Cabaleiro1María J. G. Guimarey2María J. P. Comuñas3Laura Fedele4Josefa Fernández5Luis Lugo6Departamento de Física Aplicada, Universidade de Vigo, 36310 Vigo, SpainDepartamento de Física Aplicada, Universidade de Vigo, 36310 Vigo, SpainLaboratorio de Propiedades Termofísicas, Grupo NaFoMat, Departamento de Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainLaboratorio de Propiedades Termofísicas, Grupo NaFoMat, Departamento de Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainInstitute of Construction Technologies, National Research Council, 35127 Padova, ItalyLaboratorio de Propiedades Termofísicas, Grupo NaFoMat, Departamento de Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, SpainDepartamento de Física Aplicada, Universidade de Vigo, 36310 Vigo, SpainThis 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.https://www.mdpi.com/2079-4991/8/1/16graphene nanoplateletspoly(ethylene glycol)NePCMsolid-liquid phase changethermal conductivitydynamic viscosityvolumetric behaviour |
| spellingShingle | Marco A. Marcos David Cabaleiro María J. G. Guimarey María J. P. Comuñas Laura Fedele Josefa Fernández Luis Lugo PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets Nanomaterials graphene nanoplatelets poly(ethylene glycol) NePCM solid-liquid phase change thermal conductivity dynamic viscosity volumetric behaviour |
| title | PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets |
| title_full | PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets |
| title_fullStr | PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets |
| title_full_unstemmed | PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets |
| title_short | PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets |
| title_sort | peg 400 based phase change materials nano enhanced with functionalized graphene nanoplatelets |
| topic | graphene nanoplatelets poly(ethylene glycol) NePCM solid-liquid phase change thermal conductivity dynamic viscosity volumetric behaviour |
| url | https://www.mdpi.com/2079-4991/8/1/16 |
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