Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 42, Pages 28838-28843Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b09471
Keywords
cellulose nanopaper; optically transparent; thermally conductive; electronically insulating; bilayer design; solvent exfoliation
Funding
- Office of Naval Research [N000141410721]
- Maryland Nanocenter and its Fablab, Nisplab, and surface analysis center
- China Scholarship Council (CSC)
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Cellulose nanofiber (CNF) from abundant and renewable wood is an emerging material with excellent mechanical, chemical, and optical properties. Transparent nanopaper made of CNF (CNF-nanopaper) could potentially replace plastics in electronics due to its excellent optical transparency, mechanical strength, and biodegradability. However, CNF-nanopaper normally has a low thermal conductivity and poor stability in increasing temperatures, which is not suitable for long-term stability and reliability in devices. Herein, for the first time, we report a thermally conductive, electrically insulating, and optically transparent nanopaper using a bilayer design where a thin layer of boron nitride (BN) nanosheets were coated on the CNF-nanopaper. An optical transparency (70%) and a thermal conductivity (0.76 W/m/K) were successfully achieved through a solution-based process at room temperature. Such an optically transparent, electrically insulating, and thermally conductive bilayer nanopaper can find applications in a range of electronic devices.
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