Reducing Kapitza resistance of graphene–paraffin interfaces by alkyl functionalisation

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Abstract

Paraffin waxes are a promising material for heat storage. Improvement of the thermal conductivity can be obtained by adding graphene nanofillers, but interfacial thermal resistance (ITR) forms a problem. Reduction of ITR by functionalisation of the graphene was previously shown possible in the liquid state. For application in heat storage, the thermal properties in solid state are equally important. In the present study, the most optimal reduction of ITR in the solid state was shown for octyl functional groups; in both molten and solid samples, a striking reduction by 95% as compared to pristine graphene was achieved.
Original languageEnglish
Article number141341
Number of pages6
JournalChemical Physics Letters
Volume846
DOIs
Publication statusPublished - Jul 2024

Funding

This study is part of the research project \u201CNanofiller-enhanced wax for heat storage (Wax+)\u201D with project number 18052 of the Open Technology Programme, which is (partly) financed by the Dutch Research Council (NWO) , Applied and Engineering Sciences (TTW) domain. This work was carried out on the Dutch national e-infrastructure with the support of SURF Cooperative. The authors would like to thank F. M\u00FCller-Plathe and N. van der Vegt for the lively discussions. Additional thanks are extended to Pablo Romero Marimon, Maurice Lever and Iris Box, whose student projects laid a basis for the present study. This study is part of the research project \u201CNanofiller-enhanced wax for heat storage (Wax+)\u201D with project number 18052 of the Open Technology Programme, which is (partly) financed by the Dutch Research Council (NWO), The Netherlands, Applied and Engineering Sciences (TTW), The Netherlands domain. This work was carried out on the Dutch national e-infrastructure with the support of SURF Cooperative.

FundersFunder number
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
SURF

    Keywords

    • Graphene nanofiller
    • Interfacial thermal resistance
    • Kapitza resistance
    • Molecular dynamics modelling
    • Nanocomposite
    • Paraffin wax
    • Phase change material

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