Radiation and chemical crosslinking of PVA/starch

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dc.contributor.authorNASCIMENTO, CARLOS E.pt_BR
dc.contributor.authorLUGAO, ADEMAR B.pt_BR
dc.coverageInternacionalpt_BR
dc.creator.eventoINTERNATIONAL NUCLEAR ATLANTIC CONFERENCEpt_BR
dc.date.accessioned2020-01-13T12:12:17Z
dc.date.available2020-01-13T12:12:17Z
dc.date.eventoOctober 21-25, 2019pt_BR
dc.description.abstractIn attainment of superabsorbent polymers (SAPs) based on PVA [poly (vinyl alcohol)] and starch, two different crosslinking processes were utilized: use of glutaraldehyde and gamma- radiation, aiming at evaluating the best alternative for the SAPs formation. Polymer mixtures from PVA aqueous solutions and starch suspensions were crosslinked chemically and by radiation apart. For that, the radiation absorbed dose and the proportion of crosslinker were kept fixed, varying only the amounts of PVA and starch at diverse proportions. It was observed experimentally that the irradiated samples showed a better reaction control and purity, but lower crosslinking degree than that of glutaladehyde-crosslinked SAPs, thus resulting higher swellings for the former. The glutaraldehyde-crosslinked samples showed a higher range of degradability on TGA (thermogravimetric analysis) test due to the presence of residual HCl and glutaraldehyde in them. IR spectra absorption bands of the chemically obtained SAPs showed glutaraldehyde peaks, whereas these were absent in the irradiated materials. By these experiments, one concluded that increases of starch proportion lead to decreases of the SAPs swelling, probably due to higher hydrophobic characteristics of starch than those of PVA, despite some properties of the this having been improved.pt_BR
dc.event.siglaINACpt_BR
dc.format.extent2552-2565pt_BR
dc.identifier.citationNASCIMENTO, CARLOS E.; LUGAO, ADEMAR B. Radiation and chemical crosslinking of PVA/starch: a comparative study to obtain superabsorbent hydrogels. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. <b>Proceedings...</b> Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 2552-2565. Disponível em: http://repositorio.ipen.br/handle/123456789/30642.
dc.identifier.orcid0000-0002-1737-3191pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-1737-3191
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/30642
dc.localRio de Janeiropt_BR
dc.local.eventoSantos, SPpt_BR
dc.publisherAssociação Brasileira de Energia Nuclear
dc.rightsopenAccesspt_BR
dc.subjectabsorbed radiation doses
dc.subjectcomparative evaluations
dc.subjectcross-linking
dc.subjectgamma radiation
dc.subjecthydrogels
dc.subjectinfrared spectra
dc.subjectpva
dc.subjectscanning electron microscopy
dc.subjectstarch
dc.subjectthermal gravimetric analysis
dc.titleRadiation and chemical crosslinking of PVA/starchpt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorCARLOS EDUARDO NASCIMENTO
ipen.autorADEMAR BENEVOLO LUGAO
ipen.codigoautor9151
ipen.codigoautor339
ipen.contributor.ipenauthorCARLOS EDUARDO NASCIMENTO
ipen.contributor.ipenauthorADEMAR BENEVOLO LUGAO
ipen.date.recebimento20-01
ipen.event.datapadronizada2019pt_BR
ipen.identifier.ipendoc26291pt_BR
ipen.notas.internasProceedingspt_BR
ipen.subtituloa comparative study to obtain superabsorbent hydrogelspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication72e04cc3-6002-4b4a-9852-45b0bbdd2308
relation.isAuthorOfPublication99ac24c5-2ae1-465a-a6f2-40b4d9af6af7
relation.isAuthorOfPublication.latestForDiscovery72e04cc3-6002-4b4a-9852-45b0bbdd2308
sigepi.autor.atividadeLUGAO, ADEMAR B.:339:740:Npt_BR
sigepi.autor.atividadeNASCIMENTO, CARLOS E.:9151:310:Spt_BR
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