University of Oulu

Kaitao Zhang, Lukas Ketterle, Topias Järvinen, Shu Hong, Henrikki Liimatainen, Conductive hybrid filaments of carbon nanotubes, chitin nanocrystals and cellulose nanofibers formed by interfacial nanoparticle complexation, Materials & Design, Volume 191, 2020, 108594, ISSN 0264-1275,

Conductive hybrid filaments of carbon nanotubes, chitin nanocrystals and cellulose nanofibers formed by interfacial nanoparticle complexation

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Author: Zhang, Kaitao1; Ketterle, Lukas2; Järvinen, Topias3;
Organizations: 1Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, FI-90014, Finland
2Institute for Mechanical Process Engineering and Mechanics, Faculty of Chemical and Process Engineering, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
3Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P.O. Box 4300, FI-90014, Finland
4College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.5 MB)
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Language: English
Published: Elsevier, 2020
Publish Date: 2020-03-16


In this paper, anionic TEMPO-oxidized cellulose nanofibers (TO-CNFs) and cationic, partially deacetylated, chitin nanocrystals (ChNCs) were used to fabricate continuous composite filaments (TO-CNF/ChNC filament) with a straightforward and sustainable aqueous process based on the interfacial nanoparticle complexation (INC) of oppositely charged nano-constituents. In particular, the role of TO-CNF and ChNC concentrations in filament drawing and the effect of drawing speed on the mechanical properties of composite filaments were investigated. Moreover, conductive filaments were fabricated by mixing single walled carbon nanotubes (SWCNTs) with TO-CNF dispersion and further complexing with the ChNC aqueous suspension. A conductive filament with an electrical conductivity of 2056 S/m was obtained. However, the increase in the SWCNTs content reduced the mechanical properties of the formed filament compared to neat TO-CNF/ChNC filament. This study not only introduces a new nanoparticle candidate to prepare filaments based on INC method but also provides potential advanced and alternative green filament to be used as wearable electronics in biomedical area.

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Series: Materials & design
ISSN: 0264-1275
ISSN-E: 1873-4197
ISSN-L: 0264-1275
Volume: 191
Article number: 108594
DOI: 10.1016/j.matdes.2020.108594
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The authors acknowledge the support from the Academy of Finland project “Bionanochemicals” (298295) and European Regional Development Fund/Council of Oulu Region (“Novidam” project), Finland. We also thank the support of Center of Microscopy and Nanotechnology in University of Oulu, Elisa Wirkkala for technical assistance in elemental analysis.
Academy of Finland Grant Number: 298295
Detailed Information: 298295 (Academy of Finland Funding decision)
Copyright information: © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (