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Functionalized polyanilines made by nucleophilic addition reaction, applied in gas sensors field

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dc.title Functionalized polyanilines made by nucleophilic addition reaction, applied in gas sensors field en
dc.contributor.author Cavallo, Pablo Cesar
dc.contributor.author Frontera, Evelina
dc.contributor.author Acevedo, Diego Fernando
dc.contributor.author Olejník, Robert
dc.contributor.author Slobodian, Petr
dc.contributor.author Sáha, Petr
dc.contributor.author Barbero, Cesar A.
dc.relation.ispartof Synthetic Metals
dc.identifier.issn 0379-6779 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2016
utb.relation.volume 215
dc.citation.spage 127
dc.citation.epage 133
dc.type article
dc.language.iso en
dc.publisher Elsevier
dc.identifier.doi 10.1016/j.synthmet.2016.02.013
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S037967791630039X
dc.subject Modified polymers en
dc.subject Organic volatile compounds en
dc.subject Polyaniline en
dc.subject Resistive sensors en
dc.description.abstract Resistive sensors for organic volatile compounds are built using functionalized polyanilines. The functionalization of polyaniline (PANI) is achieved by nucleophilic addition with thiols and is confirmed by X-ray Photoelectron Spectroscopy. The modified polymers tested as resistive sensors change the polymer sensitivity to volatile compounds. PANI shows a signal that increases when the chain length increases, however, functionalized polyanilines show a completely different behaviour. The sensitivity to long chain alcohols increases when PANI is modified with long alkyl chains, the opposite behaviour occurs when more hydrophilic groups are bonding to the polymer. We conclude that the different sensitivity of the functionalized polyanilines to the same volatile molecule allows identifying the analyte. In that way, multisensor arrays based on these materials could be used as an electronic nose. To explain this behaviour measurements of contact angle were performed. The data reveal that all modified polyanilines are more hydrophobic than PANI, this is likely to be due to the presence of the sulphur atoms. Therefore, we conclude that the hydrophobic/hydrophilic nature of the surface plays an important role but is not decisive in the sensor response. Also, Van der Waals interactions between the alkyl chains bound to de PANI and present in the sensed alcohols play an important role. Accordingly, the sensitivity for a plain alkane (heptane) increases strongly when PANI is modified with long alkyl chains. © 2016 Elsevier B.V. All rights reserved. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1006280
utb.identifier.rivid RIV/70883521:28610/16:43874349!RIV17-MSM-28610___
utb.identifier.obdid 43874974
utb.identifier.scopus 2-s2.0-84959344040
utb.identifier.wok 000376839900019
utb.identifier.coden SYMED
utb.source j-scopus
dc.date.accessioned 2016-06-22T12:14:39Z
dc.date.available 2016-06-22T12:14:39Z
dc.description.sponsorship CONICET; FONCYT; MinCyT-Cordoba; SECYT-UNRC; collaboration project of MCTIP (Argentina); Ministry of Education, Youth and Sport of the Czech Republic-Program NPU I [LO1504]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Olejník, Robert
utb.contributor.internalauthor Slobodian, Petr
utb.contributor.internalauthor Sáha, Petr
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