Hierarchical Incorporation of Reduced Graphene Oxide into Anisotropic Cellulose Nanofiber Foams Improves Their Thermal Insulation

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Seyed Ehsan Hadi
  • Elias Möller
  • Sina Nolte
  • Agnes Åhl
  • Olivier Donzel-Gargand
  • Lennart Bergström
  • Alexander Holm

Research Organisations

External Research Organisations

  • Stockholm University
  • Philipps-Universität Marburg
  • Uppsala University
  • Linkoping University
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Details

Original languageEnglish
Pages (from-to)45337–45346
Number of pages10
JournalACS Applied Materials and Interfaces
Volume16
Issue number34
Early online date13 Aug 2024
Publication statusPublished - 28 Aug 2024

Abstract

Anisotropic cellulose nanofiber (CNF) foams represent the state-of-the-art in renewable insulation. These foams consist of large (diameter >10 μm) uniaxially aligned macropores with mesoporous pore-walls and aligned CNF. The foams show anisotropic thermal conduction, where heat transports more efficiently in the axial direction (along the aligned CNF and macropores) than in the radial direction (perpendicular to the aligned CNF and macropores). Here we explore the impact on axial and radial thermal conductivity upon depositing a thin film of reduced graphene oxide (rGO) on the macropore walls in anisotropic CNF foams. To obtain rGO films on the foam walls we developed liquid-phase self-assembly to deposit rGO in a layer-by-layer fashion. Using electron and ion microscopy, we thoroughly characterized the resulting rGO-CNF foams and confirmed the successful deposition of rGO. These hierarchical rGO-CNF foams show lower radial thermal conductivity (λr) across a wide range of relative humidity compared to CNF control foams. Our work therefore demonstrates a potential method for improved thermal insulation in anisotropic CNF foams and introduces versatile self-assembly for postmodification of such foams.

Keywords

    cellulose nanofiber foam, CNF, insulation, layer-by-layer, reduced graphene oxide, self-assembly, thermal conductivity

ASJC Scopus subject areas

Sustainable Development Goals

Cite this

Hierarchical Incorporation of Reduced Graphene Oxide into Anisotropic Cellulose Nanofiber Foams Improves Their Thermal Insulation. / Hadi, Seyed Ehsan; Möller, Elias; Nolte, Sina et al.
In: ACS Applied Materials and Interfaces, Vol. 16, No. 34, 28.08.2024, p. 45337–45346.

Research output: Contribution to journalArticleResearchpeer review

Hadi SE, Möller E, Nolte S, Åhl A, Donzel-Gargand O, Bergström L et al. Hierarchical Incorporation of Reduced Graphene Oxide into Anisotropic Cellulose Nanofiber Foams Improves Their Thermal Insulation. ACS Applied Materials and Interfaces. 2024 Aug 28;16(34):45337–45346. Epub 2024 Aug 13. doi: 10.1021/acsami.4c09654
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AU - Åhl, Agnes

AU - Donzel-Gargand, Olivier

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AU - Holm, Alexander

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