Scalable Approach to Construct Self-Assembled Graphene-Based Films with An Ordered Structure for Thermal Management.

ACS Appl Mater Interfaces

Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering J07 , The University of Sydney, Sydney , New South Wales 2006 , Australia.

Published: December 2018

AI Article Synopsis

  • Large-area oxidized cellulose nanocrystal (OCNC)/graphene nanocomposites were created using a simple and cost-effective evaporation-induced self-assembly method followed by thermal curing.
  • The resulting nanocomposites showcased well-aligned nano-sized graphene layers separated by OCNC, enhancing thermal connectivity in the material.
  • These composites achieved an impressive thermal conductivity of 25.66 W/m K, with a remarkable thermal conductivity enhancement of 7235% using only 4.1 vol % graphene, making it the best-performing material of its kind under 70 wt % filler content to date.

Article Abstract

Large-area bulk oxidized cellulose nanocrystal (OCNC)/graphene nanocomposites with highly oriented structures were produced through a straightforward, cost-effective large-scale evaporation-induced self-assembly process followed by thermal curing. Well-aligned nano-sized graphene layers were evident and separated by the OCNC planar layers, which facilitate highly interconnected and continuous thermal transport parallel to the alignment. Hence, the laminated graphene-based nanocomposites possess an excellent in-plane thermal conductivity of 25.66 W/m K and a thermal conductivity enhancement (η) of 7235% with only a 4.1 vol % graphene loading. This value is the highest recorded among all laminated composite films with <70 wt % filler content reported to date. Using this design strategy, other large-area aligned composites with other functional nanomaterials, already in large-scale production, can be made for use in a wide range of applications.

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Source
http://dx.doi.org/10.1021/acsami.8b13808DOI Listing

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