Attainment and characterization of carboxymethyl chitosan hydrogels by enzymatic cross-linking

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dc.contributor.authorMorandim-Giannetti A.A.
dc.contributor.authorWecchi P.O.
dc.contributor.authorSilverio P.A.
dc.contributor.authorCarlstron R.
dc.contributor.authorBersanetti P.A.
dc.date.accessioned2019-08-20T00:12:03Z
dc.date.available2019-08-20T00:12:03Z
dc.date.issued2019
dc.description.abstract© 2019, Akadémiai Kiadó, Budapest, Hungary.In this study, carboxymethyl chitosan hydrogels (CMCH) cross-linked with catechin in the presence of laccase (CMCH-C-L) were obtained. The synthesis and characterization of CMCH were carried out from chitosan (CH) and its cross-linking with catechin (C) in the presence of laccase (L). DSC, ATR-FTIR, and rheological analyses of the CMCH solution and CMCH-C-L hydrogel were carried out. Three main thermal events were observed in the DSC characterization with temperatures and enthalpies related to each event for CMCH: 167.2 °C/+ 523.3 J g−1, 269.1 °C/− 35.0 J g−1, and 333.3 °C/− 17.6 J g−1, possibly referring to these processes: polymerization, breaking of electrostatic interactions, and decomposition of the material, respectively. The CMCH-C-L hydrogel presented values of 165.2 °C/+ 376.6 J g−1, 266.7 °C/− 47.8 J g−1, and 333.3 °C/− 31.5 J g−1. Conversely, the chitosan presented only one thermal event of decomposition at 302.5 °C and enthalpy of − 258.5 J g−1. Rheological properties of the hydrogels (viscosities, consistency values, and flow indices) showed non-Newtonian pseudoplastic rheological behavior and that the viscosity increased approximately 150% after the reaction (134.25 mPa s for CMCH and 342.85 mPa s in CMCH-C-L) confirming the formation of cross-links after the addition of catechin and laccase. Morphological analyses of CMCH and CMCH-C-L films via SEM showed the modification of the material after the reaction with the catechin in the presence of laccase and corroborated with the results, confirming the presence of cross-links.
dc.description.firstpage3635
dc.description.issuenumber5
dc.description.lastpage3643
dc.description.volume138
dc.identifier.citationGIANNETTI, Andreia de Araujo Morandim; WECCHI, PATRICK DE OLIVEIRA; SILVÉRIO, PAULA DE ARAÚJO; CARLSTRON, REGINA; BERSANETTI, PATRÍCIA ALESSANDRA. Attainment and characterization of carboxymethyl chitosan hydrogels by enzymatic cross-linking. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, v. x, n. x, p. x-x, 2019.
dc.identifier.doi10.1007/s10973-019-08571-4
dc.identifier.issn1588-2926
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1715
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.rightsAcesso Restrito
dc.subject.otherlanguageCarboxymethyl chitosan
dc.subject.otherlanguageDSC
dc.subject.otherlanguageEnzymatic cross-linking
dc.subject.otherlanguageHydrogels
dc.subject.otherlanguageLaccase
dc.titleAttainment and characterization of carboxymethyl chitosan hydrogels by enzymatic cross-linking
dc.typeArtigo
fei.scopus.citations9
fei.scopus.eid2-s2.0-85069657356
fei.scopus.subjectCarboxymethyl
fei.scopus.subjectCarboxymethyl chitosan
fei.scopus.subjectLaccases
fei.scopus.subjectMorphological analysis
fei.scopus.subjectRheological analysis
fei.scopus.subjectRheological behaviors
fei.scopus.subjectRheological property
fei.scopus.subjectSynthesis and characterizations
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85069657356&origin=inward
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