Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 132, Issue -, Pages 425-430Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2014.09.032
Keywords
Graphene; Nickel foam; PCMs; Superoleophilicity; Latent heat
Funding
- National Natural Science Foundation of China [51263012, 51262019]
- Gansu Provincial Science Fund for Distinguished Young Scholars, China [1308RJDA012]
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Superoleophilic graphene-nickel foam (PDMS-G-NF), which was prepared by coating graphene nanosheets onto nickel foam followed by surface modification with polydimethylsiloxane (PDMS), was used as porous supporting material to prepare form-stable phase change materials (PCMs) composites. Owing to the strong hydrophobic and superhydrophilic wettability of PDMS-G-NF, PCMs can be absorbed spontaneously into PDMS-G-NF and can stay stable without leakage even over their melting points. The incorporation of PCMs into PDMS-G-NF does not change the crystal structure but lowers the crystallinity size of PCMs in the composites, which is confirmed by X-ray powder diffraction (XRD) analysis. The latent heat of PDMS-G-NF/PCM composites was measured in the range of 423-123.41 kJ kg(-1). Taking advantages of the simple process and good stability the PDMS-G-NF should be ideal candidates as an alternative to traditional PCMs, which may have great potentials for renewable energy saving applications. (C) 2014 Elsevier B.V. All rights reserved.
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