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Original Research ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Mater. | doi: 10.3389/fmats.2019.00235

Cellulose Nanowhisker (CNW)/Graphene Nanoplatelet (GN) Composite Films with Simultaneously Enhanced Thermal, Electrical and Mechanical Properties

 Dongyan Liu1*,  Yu Dong2, Yueyue Liu1,  Na Ma1 and  Guoxin Sui1
  • 1Institute of Metals Research, Chinese Academy of Sciences, China
  • 2School of Civil and Mechanical Engineering, Faculty of Science and Engineering, Curtin University, Australia

Transparent cellulose nanowhisker (CNW)/ graphene nanoplatelet (GN) composite films were produced via sonication mixing and solution casting methods. Such composite films exhibited improved thermal, electrical and mechanical properties. The material morphologies and microstructures were examined using scanning electronic microscopy (SEM), X-ray diffraction (XRD) analysis and Raman spectroscopy. Strong interaction was detected when CNWs were randomly attached onto graphene sheets, as evidenced by SEM images obtained in this study. In particular, the addition of GNs into CNWs had significant effect on the thermal behavior of composite films. The melting temperature (Tm) and initial thermal decomposition temperature (Tid) of CNW films were both increased by 23.2, 29.3, 26.3ºC, and 70.2, 88.4, 87.8ºC with the inclusions of 0.1, 0.25 and 0.5 wt% GNs, respectively. The electrical conductivity of composite films was enhanced in a monotonically increasing manner with the maximum level of 4.0×10-5 S/m detected at the GN content of 0.5 wt%. Their tensile strength was also improved by maximum 33.7% when increasing the GN content up to 0.25 wt% as opposed to that of CNW films. Such CNW/GN composite films can be potentially used in green anti-static and electronic packaging applications.

Keywords: Cellulose nanowhiskers (CNWs), Graphene nanoplatelets (GNPs), electrical conductivity, Thermal stability, mechanical strength

Received: 22 Jul 2019; Accepted: 09 Sep 2019.

Copyright: © 2019 Liu, Dong, Liu, Ma and Sui. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Dr. Dongyan Liu, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, China, dyliu@imr.ac.cn