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Cellulose
Published in: Cellulose 5/2019

25-01-2019 | Original Research

Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films

Authors: Takeya Unuma, Omou Kobayashi, Iffah F. A. Hamdany, Vinay Kumar, Jarkko J. Saarinen

Published in: Cellulose | Issue 5/2019

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Abstract

We investigate the terahertz transmission through flexible composite films that contain nanofibrillar cellulose (NFC) and different blending percentages of the conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). The real part of terahertz complex conductivity is found to decrease with decreasing frequency for each NFC composite film and to approach a finite positive value dependent on the PEDOT:PSS blending percentage in the limit of zero frequency. Both the real and imaginary parts of complex conductivity spectra can be fitted simultaneously with an extended Drude model that describes a partially localized nature of carriers. Our spectral analysis indicates that carriers in the NFC composite become denser and also less localized as the PEDOT:PSS blending percentage is increased.

Graphical abstract

previous article Polyols and rigid polyurethane foams derived from liquefied lignocellulosic and cellulosic biomass
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Metadata
Title
Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films
Authors
Takeya Unuma
Omou Kobayashi
Iffah F. A. Hamdany
Vinay Kumar
Jarkko J. Saarinen
Publication date
25-01-2019
Publisher
Springer Netherlands
Published in
Cellulose / Issue 5/2019
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-019-02276-5

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