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Thermoelectric properties of electrospun carbon nanofibres derived from lignin

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Show simple item record Dalton, Niall Lynch, Robert P. Collins, Maurice N. Culebras, Mario 2018-10-31T09:29:14Z 2018
dc.description peer-reviewed en_US
dc.description.abstract Developing sustainable and efficient thermoelectric materials is a challenge because the most common thermoelectric materials are based on rare elements such as bismuth and telluride. In this context, we have produced bio-based carbon nanofibres (CNFs) derived from mixtures of polyacrylonitrile and lignin using electrospinning. The addition of lignin (up to 70%) reduces the diameter of CNFs from 450 nm to 250 nm, increases sample flexibility, and promotes inter-fibre fusion. The crystalline structure of the CNFs was analysed by Raman spectroscopy. The electrical conductivity and the Seebeck coefficient were evaluated as function of the lignin content in the precursor and carbonised equivalents. Finally, a conversion of p-type to n-type semiconducting behaviour was achieved with a hydrazine vapour treatment. We observe a maximum p-type power factor of 9.27 μW cm-1 K-2 for CNFs carbonised at 900°C with 70% lignin which is a 34.5-fold increase to the CNFs with 0% lignin. For the hydrazine treated samples, we observe a maximum n-type power factor of 10.2 μW cm-1 K-2 for the CNFs produced in the same way which is an 11.0-fold increase to the hydrazine-treated CNFs with 0% lignin. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation GOIPG/2016/655 en_US
dc.relation.ispartofseries International Journal of Biological Macromolecules;121, pp. 472-479
dc.rights This is the author’s version of a work that was accepted for publication inInternational Journal of Biological Macromolecules . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published inInternational Journal of Biological Macromolecules, 2018, 121, pp. 472-479, en_US
dc.subject thermoelectric materials en_US
dc.subject crystalline structure en_US
dc.title Thermoelectric properties of electrospun carbon nanofibres derived from lignin en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.ijbiomac.2018.10.051
dc.contributor.sponsor IRC en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid GOIPG/2016/655 en_US
dc.relation.projectid 720707 en_US 2019-10-12
dc.embargo.terms 2019-10-12 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2868093

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