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Nanomaterials 2018, 8(9), 694; https://doi.org/10.3390/nano8090694

Experimental Investigation on 3D Graphene-CNT Hybrid Foams with Different Interactions

1
Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon 16419, Korea
2
Department of Energy Science, Sungkyunkwan University, Suwon 16419, Korea
3
Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
4
Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
5
B.H.K., Sasang-gu, Busan 46948, Korea
6
School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 18 August 2018 / Revised: 2 September 2018 / Accepted: 3 September 2018 / Published: 6 September 2018
(This article belongs to the Special Issue Nanostructured Porous Carbon based 3D Architectures)
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Abstract

Due to the exceptional properties of graphene, numerous possibilities for real applications in various fields have been provided. However, it is a challenge to fabricate bulk graphene materials with properties arising from the nature of individual graphene sheets, and which assemble into monolithic three-dimensional structures. If 3D structured graphene foam were made instead of 2D structured graphene, it is expected that it would be a facile fabrication, with relatively low cost with the possibility of scale-up, and would maintain the intrinsic properties of graphene. To solve the weaknesses of 2D structured graphene, this study aimed to fabricate a 3D graphene-carbon nanotubes (CNT) hybrid foam. In this study, CNT was used to reinforce the graphene foams. In addition, two different surfactants, known as sodium dodecylbenzene sulphonate (SDBS) and cetyltrimethylammonium bromide (CTAB), were applied to help CNT dispersion. The π–π interaction was induced by SDBS/CNT, while ionic interaction was derived from CTAB/CNT. To confirm the charge effect with different surfactants, SEM, Zeta-potential, FT-IR, Raman spectroscopy, and compression tests were performed. When using a cationic surfactant, CTAB, compressive modulus, and strength increased due to the formation of relatively strong ionic bonding. View Full-Text
Keywords: graphene oxide; carbon nanotube; hybrid foam; surfactants; charge effect graphene oxide; carbon nanotube; hybrid foam; surfactants; charge effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Kim, H.-S.; Lee, S.K.; Wang, M.; Kang, J.; Sun, Y.; Jung, J.W.; Kim, K.; Kim, S.-M.; Nam, J.-D.; Suhr, J. Experimental Investigation on 3D Graphene-CNT Hybrid Foams with Different Interactions. Nanomaterials 2018, 8, 694.

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