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Thermal analysis characterization of PAAm-co-MC hydrogels

dc.contributor.authorGabbay Alves, Tais Vanessa
dc.contributor.authorMadureira Tavares, Eraldo Jose
dc.contributor.authorAouada, Fauze Ahmad [UNESP]
dc.contributor.authorBrito Negrao, Charles Alberto
dc.contributor.authorChaves Oliveira, Marcos Ene [UNESP]
dc.contributor.authorDuarte Junior, Anivaldo Pereira
dc.contributor.authorFerreira da Costa, Carlos Emmerson
dc.contributor.authorCarrera Silva Junior, Jose Otavio
dc.contributor.authorRibeiro Costa, Roseane Maria
dc.contributor.institutionFed Univ Para
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:29:52Z
dc.date.available2014-05-20T13:29:52Z
dc.date.issued2011-12-01
dc.description.abstractThis paper reports the thermal characterization of polyacrylamide-co-methylcellulose hydrogels and the constituent monomers (acrylamide and methylcellulose). Polymeric materials can be used to produce hydrogels, which can be natural, synthetic, or a mixture. The hydrogels described here were obtained by free radical polymerization, in the presence of N,N'-methylene-bis-acrylamide as a cross-linker agent. Four acrylamide concentrations were used for the synthesis of hydrogels: 3.6, 7.2, 14.7, and 21.7% (w/v). The materials so obtained were analyzed by TG, DTG, DSC, and FT-IR. The TG curves of acrylamide and methylcellulose showed three mass loss events. In DSC curves, the acrylamide exhibited one melting peak at 84.5 A degrees C, and methylcellulose indicated one exothermic event. Nevertheless, acrylamide was considered more stable than methylcellulose. The TG curves of the hydrogels exhibited three mass loss events, and on the DSC curves, three endothermic events were observed. It was verified that the different acrylamide proportions influenced the thermic behavior of hydrogels, and that the authors considered the 7.2% hydrogel a promising drug carrier system. The absorption bands were well defined, confirming the presence of the functional groups in the samples.en
dc.description.affiliationFed Univ Para, Fac Chem Engn, BR-66075110 Belem, PA, Brazil
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Eastern Amazon, Lab Agrobusiness, BR-66009510 Belem, PA, Brazil
dc.description.affiliationSão Paulo State Univ, Inst Chem, BR-14801907 Araraquara, SP, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Inst Chem, BR-14801907 Araraquara, SP, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.format.extent717-724
dc.identifierhttp://dx.doi.org/10.1007/s10973-011-1572-z
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 106, n. 3, p. 717-724, 2011.
dc.identifier.doi10.1007/s10973-011-1572-z
dc.identifier.issn1388-6150
dc.identifier.lattes8251270609012225
dc.identifier.orcid0000-0002-6870-6961
dc.identifier.urihttp://hdl.handle.net/11449/10131
dc.identifier.wosWOS:000297371200013
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.relation.ispartofjcr2.209
dc.relation.ispartofsjr0,587
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectHydrogelsen
dc.subjectPolymersen
dc.subjectThermal analysisen
dc.subjectPAAm-co-MCen
dc.titleThermal analysis characterization of PAAm-co-MC hydrogelsen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
dspace.entity.typePublication
unesp.author.lattes8251270609012225[3]
unesp.author.orcid0000-0002-6870-6961[3]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Engenharia, Ilha Solteirapt
unesp.departmentFísica e Química - FEISpt

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