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Thermal properties and molecular interactions of alginate/gelatin hydrogel microparticles

2018Conference object Open access
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dc.contributor.authorPilipenko, Nadezhda
dc.contributor.authorSorita, Guilherme Dallarmi
dc.contributor.authorPinto, João A.
dc.contributor.authorFernandes, Isabel P.
dc.contributor.authorGonçalves, Odinei Hess
dc.contributor.authorLeimann, Fernanda Vitória
dc.contributor.authorBarreiro, M.F.
dc.date.accessioned2019-02-12T09:30:53Z
dc.date.available2019-02-12T09:30:53Z
dc.date.issued2018
dc.description.abstractHydrogels are attractive materials for several engineering applications. They can be obtained, for example, from the combination of alginate and gelatin, and have been widely used in microencapsulation processes. In this work alginate/gelatin hydrogel microparticles were prepared based on the enzymatic crosslinking of gelatin (transglutaminase, TGase), and alginate gelation induced by calcium chloride (CaCl2). The evaluated conditions to study thermal properties, and molecular interactions between microparticle’s components where: gelatin amount (%wt, polymeric mixture-basis), TGase amounts (active units/ ggelatin) and contact time with CaCl2 (min). Four samples were obtained. For sample 1 the evaluated conditions were: gelatin amount 25 %wt; TGase amounts 10 U/g and contact time with CaCl2 81 min. For samples 2, 3 and 4: gelatin amount 75 %wt, 75 %wt and 75 %wt; TGase amounts 10 U/g, 30 U/g and 30 U/g and contact time with CaCl2 81 min, 21 min and 81 min, relatively. One formulation composed only by alginate (MAlginate) was also produced for comparison. The contact time with CaCl2 was 240 min. Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) confirmed that the studied variables influence both, thermal properties and the developed molecular interactions between the two polymers (alginate and gelatin) (fig.1). FTIR results show that a higher contact time with CaCl2 led to an increased level of alginate crosslinking. The use of TGase results in the increasing of the hydrogen bounded N-H groups. According to DSC results the use of TGase increases the thermal stability of crosslinked microparticles.pt_PT
dc.description.sponsorshipPOCI-01-0145-FEDER-006984 (LA LSRE-LCM), and UID/AGR/00690/2013 (CIMO) funded by FEDER, through POCI-COMPETE2020 and FCT. Project NORTE-01-0145- FEDER-000006, funded by NORTE2020 under PT2020, through FEDER. CAPES for the support. Ajinomoto for the TGase sample.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPilipenko, Nadezhda; Sorita, Guilherme; Pinto, J.A.; Fernandes, I.P.; Gonçalves, O.H.; Leimann, F.V.; Barreiro, M.F. (2018). Thermal properties and molecular interactions of alginate/gelatin hydrogel microparticles. In XXIV Encontro Luso-Galego de Química: livro de resumos. ISBN 978-989-8124-24-1pt_PT
dc.identifier.isbn978-989-8124-24-1
dc.identifier.urihttp://hdl.handle.net/10198/18846
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSociedade Portuguesa de Químicapt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHydrogelspt_PT
dc.subjectEnzymatic Crosslinkingpt_PT
dc.titleThermal properties and molecular interactions of alginate/gelatin hydrogel microparticlespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00690%2F2013/PT
oaire.citation.conferencePlacePorto, Portugalpt_PT
oaire.citation.titleLivro de Resumos do XXIV Encontro Luso-Galego de Químicapt_PT
oaire.fundingStream5876
person.familyNamePinto
person.familyNameFernandes
person.familyNameGonçalves
person.familyNameLeimann
person.familyNameBarreiro
person.givenNameJoão A.
person.givenNameIsabel P.
person.givenNameOdinei Hess
person.givenNameFernanda Vitória
person.givenNameFilomena
person.identifier.ciencia-idE518-E967-5179
person.identifier.ciencia-id4D1C-441F-C7F0
person.identifier.ciencia-id8F10-A04D-FC0D
person.identifier.ciencia-id3418-47D5-5746
person.identifier.orcid0000-0002-6853-9921
person.identifier.orcid0000-0002-0069-4503
person.identifier.orcid0000-0002-9528-8187
person.identifier.orcid0000-0001-6230-9597
person.identifier.orcid0000-0002-6844-333X
person.identifier.ridL-1552-2016
person.identifier.ridL-9802-2014
person.identifier.scopus-author-id57208035714
person.identifier.scopus-author-id26323585300
person.identifier.scopus-author-id9335958400
person.identifier.scopus-author-id57188719717
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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