Journal
CARBOHYDRATE POLYMERS
Volume 152, Issue -, Pages 361-369Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.06.102
Keywords
Cellulose nanofibers; Polypyrrole; Conductive nanopaper; Mechanical properties; Electrical conductivity
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Funding
- European Commission [372228-1-2012-1-FR-ERA MUNDUS-EMA21]
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In this work, we prepare cellulose nanopapers of high mechanical performance and with the electrical conductivity of a semiconductor. Cellulose nanofibers (CNF) from bleached softwood pulp were coated with polypyrrole (PPy) via in situ chemical polymerization, in presence of iron chloride (III) as oxidant agent. The structure and morphology of nanopapers were studied, as well as their thermal, mechanical and conductive properties. Nanopaper from pure CNF exhibited a very high tensile response (224 MPa tensile strength and 14.5 GPa elastic modulus). The addition of up to maximum 20% of polypyrrole gave CNF/PPy nanopapers of high flexibility and still good mechanical properties (94 MPa strength and 8.8 GPa modulus). The electrical conductivity of the resulting CNF/PPy nanopaper was of 5.2 10(-2) S cm(-1), with a specific capacitance of 7.4 F g(-1). The final materials are strong and conductive nanopapers that can find application as biodegradable flexible thin-film transistor (TFT) or as flexible biosensor. (C) 2016 Elsevier Ltd. All rights reserved.
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