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Highly conductive and mechanically robust multiwalled carbon nanotube-polyamide nanocomposites via noncovalent functionalization

  • Composites & nanocomposites
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Abstract

Electrically conductive multiwalled carbon nanotube (MWNT)/polyamide 6 (PA 6) nanocomposite films with high mechanical strength were fabricated by blending modified MWNTs with PA 6 polymer. The surface functionalization of MWNTs, which were modified using ureidopyrimidinone (upy) and pyrene-upy through covalent and noncovalent methods, respectively, significantly contributed to the uniform dispersion of MWNTs in PA 6, improving the electrical and mechanical properties of its nanocomposite. Particularly, noncovalent functionalization using pyrene-upy-MWNTs was more effective in achieving high electrical conductivities than covalent functionalization using upy-MWNTs. Pyrene-upy-MWNT/PA 6 nanocomposites with the highest electrical conductivity of 4.18 Scm−1, tensile strength of 39 MPa, and Young’s modulus of 911 MPa exhibited excellent electromagnetic interference (EMI) shielding effectiveness of 57.8 dB mm−1. These results suggest that the simple and effective preparation of MWNT/PA 6 nanocomposites using our noncovalent modification with pyrene-upy can provide benefits for application area required electrical conductivity and mechanical strength such as EMI shielding.

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Acknowledgements

This research was supported by a grant from the KRICT Core Project, the R&D Convergence Program of the National Research Council of Science and Technology of the Republic of Korea, and the Creative Materials Discovery Program through the National Research Foundation of the Republic of Korea(NRF) funded by Ministry of Science and ICT(2020M3D1A1110505).

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Author notes

  1. Jihye Jang and Young Hun Kang contributed equally to this work.

Authors and Affiliations

  1. Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea

    Jihye Jang, Young Hun Kang, Hyun-Wha Lim & Mijeong Han

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  1. Jihye Jang
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Correspondence to Mijeong Han.

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Jang, J., Kang, Y.H., Lim, HW. et al. Highly conductive and mechanically robust multiwalled carbon nanotube-polyamide nanocomposites via noncovalent functionalization. J Mater Sci 57, 4197–4209 (2022). https://doi.org/10.1007/s10853-022-06869-7

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  • DOI: https://doi.org/10.1007/s10853-022-06869-7

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