Graphene/PANI hybrid film with enhanced thermal conductivity by in situ polymerization
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Heat dissipation in time is essential for long-term reliability of electrical devices. Graphene, with superior thermal conductivity and excellent flexibility, exhibits a potential to substitute currently used graphite film for thermal management. In this work, a free-standing film with enhanced thermal conductivity and better flexibility was achieved by a facile and environmentally friendly in situ polymerization. The ‘molecular welding’ strategy was introduced for preparation of graphitized graphene oxide/polyaniline (gGO/PANI) hybrid film, and the uniformly distributed PANI, serving as a solder, connected adjacent graphene sheets and filled in air voids of GO films. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Raman spectroscopy were used to determine the structure of PANI and the interaction between GO and PANI. The in-plane thermal conductivity of gGO/PANI film is enhanced by 38% to 1019.7 ± 0.1 W m−1 K−1 with addition of 12 wt% PANI, compared with that of pristine gGO film. Besides, the gGO/PANI film shows better flexibility than gGO film after 180° bending for 500 times.
The authors are thankful to National Natural Science Foundation of China (51472160, E020603), Science and Technology Commission of Shanghai Municipality (15JC-1490700, 16JC1402200) and Shanghai Municipal Commission of Economy and Information Technology for their financial supports to this work.
- 23.Olowojoba GB, Kopsidas S, Eslava S, Gutierrez ES, Kinloch AJ, Mattevi C, Rocha VG, Taylorl AC (2017) A facile way to produce epoxy nanocomposites having excellent thermal conductivity with low contents of reduced graphene oxide. J Mater Sci 52:7323–7344. https://doi.org/10.1007/s10853-017-0969-x CrossRefGoogle Scholar
- 25.Konwer S (2016) Graphene oxide-polyaniline nanocomposites for high performance supercapacitor and their optical, electrical and electrochemical properties. J Mater Sci: Mater Electron 27:4139–4146Google Scholar