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Highly Conducting, Strong Nanocomposites Based on Nanocellulose-Assisted Aqueous Dispersions of Single-Wall Carbon Nanotubes
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0001-9088-1064
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0003-0298-8553
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Fibre Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Engineering Sciences (SCI), Mechanics.
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2014 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 8, no 3, 2467-2476 p.Article in journal (Refereed) Published
Abstract [en]

It is challenging to obtain high-quality dispersions of single-wall nanotubes (SWNTs) in composite matrix materials, in order to reach the full potential of mechanical and electronic properties. The most widely used matrix materials are polymers, and the route to achieving high quality dispersions of SWNT is mainly chemical functionalization of the SWNT. This leads to increased cost, a loss of strength and lower conductivity. In addition full potential of colloidal self-assembly cannot be fully exploited in a polymer matrix. This may limit the possibilities for assembly of highly ordered structural nanocomposites. Here we show that nanofibrillated cellulose (NFC) can act as an excellent aqueous dispersion agent for as-prepared SWNTs, making possible low-cost exfoliation and purification of SWNTs with dispersion limits exceeding 40 wt %. The NFC:SWNT dispersion may also offer a cheap and sustainable alternative for molecular self-assembly of advanced composites. We demonstrate semitransparent conductive films, aerogels and anisotropic microscale fibers with nanoscale composite structure. The NFC:SWNT nanopaper shows increased strength at 3 wt % SWNT, reaching a modulus of 133 GPa, and a strength of 307 MPa. The anisotropic microfiber composites have maximum conductivities above 200 S cm(-1) and current densities reaching 1400 A cm(-2).

Place, publisher, year, edition, pages
2014. Vol. 8, no 3, 2467-2476 p.
Keyword [en]
nanocellulose, nanopaper, carbon nanotubes, dispersions, composites, conductivity, self-assembly
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Other Chemistry Topics
Identifiers
URN: urn:nbn:se:kth:diva-144950DOI: 10.1021/nn4060368ISI: 000333539400059Scopus ID: 2-s2.0-84896929193OAI: oai:DiVA.org:kth-144950DiVA: diva2:715448
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20140505

Available from: 2014-05-05 Created: 2014-05-05 Last updated: 2017-12-05Bibliographically approved

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Hamedi, Mahiar M.Wågberg, LarsBerglund, Lars A.

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Hamedi, Mahiar M.Hajian, AlirezaFall, Andreas B.Håkansson, KarlSalajkova, MichaelaLundell, FredrikWågberg, LarsBerglund, Lars A.
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Fibre and Polymer TechnologyWallenberg Wood Science CenterFibre TechnologyMechanicsBiocomposites
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