One-step preparation of poly(NIPAM-pyrrole) electroconductive composite hydrogel and its dielectric properties

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dc.authoridSarkaya, Koray/0000-0003-0177-5134
dc.authoridYILDIRIM, Mert/0000-0002-8526-1802
dc.authorwosidYILDIRIM, Mert/B-8002-2015
dc.contributor.authorSarkaya, Koray
dc.contributor.authorYildirim, Mert
dc.contributor.authorAlli, Abdulkadir
dc.date.accessioned2021-12-01T18:46:57Z
dc.date.available2021-12-01T18:46:57Z
dc.date.issued2021
dc.department[Belirlenecek]en_US
dc.description.abstractConductive polymers and hydrogels are two of the hot prospect polymer types that are used for new stimuli responsive materials. In this study, one-step preparation of electroconductive composite hydrogels containing polypyrrole (PPy) and N-isopropylacrylamide (NIPAM) using free radical polymerization technique was achieved with N,N-methylenebisacrylamide as a crosslinker and ammonium peroxy disulphate (APS) as initiator, in mixture of water/isopropyl alcohol. The equilibrium swelling degree of the poly(NIPAM)-pyrrole) electroconductive composite hydrogel was 9.88 g of H2O/g dry polymer. According to TGA results, the thermal stability of the prepared composite poly(NIPAM-PPy) conductive hydrogel (700 degrees C) hydrogel is higher than that of pure poly(NIPAM) hydrogel (600 degrees C). Furthermore, prepared samples were characterized by FTIR, and SEM analyzes. Later, the samples were pressured into pellets so that electrical impedance spectroscopy (EIS) measurements were taken between 10 and 10 MHz at room temperature. The dielectric constant value of composite poly(NIPAM-PPy) hydrogel at 10 Hz is almost 10 times higher than that of poly(NIPAM) hydrogel. Both samples' real and imaginary parts of dielectric constant decreased with increased frequency. Samples exhibited non-Debye relaxation since experimental data fit into dielectric model of Havriliak-Negami. Moreover, low frequency data yielded d.c. conductivity of the pure and composite samples as 3.74 x 10(-11) and 1.02 x 10(-8) S/cm, respectively. Real part of impedance at low frequencies also points out similar to 10(3) times lower resistance values at 10 Hz for composite poly(NIPAM-PPy) hydrogel. Therefore, EIS results support that electroconductive composite hydrogel fabrication was achieved using free radical polymerization technique.en_US
dc.description.sponsorshipDuzce Universitesi [2019.05.03.1024]en_US
dc.description.sponsorshipDuzce Universitesi, Grant/Award Number: 2019.05.03.1024en_US
dc.identifier.doi10.1002/app.50527
dc.identifier.issn0021-8995
dc.identifier.issn1097-4628
dc.identifier.issue22en_US
dc.identifier.scopus2-s2.0-85100339353en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://doi.org/10.1002/app.50527
dc.identifier.urihttps://hdl.handle.net/20.500.12684/10074
dc.identifier.volume138en_US
dc.identifier.wosWOS:000614600900001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofJournal Of Applied Polymer Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectconducting polymersen_US
dc.subjectcrosslinkingen_US
dc.subjectdielectric propertiesen_US
dc.subjectporous materialsen_US
dc.titleOne-step preparation of poly(NIPAM-pyrrole) electroconductive composite hydrogel and its dielectric propertiesen_US
dc.typeArticleen_US

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