EFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDS

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dc.contributor.authorGarcia, Joao A. F. [UNESP]
dc.contributor.authorMoura, Marcia R. de [UNESP]
dc.contributor.authorAouada, Fauze A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFEIS
dc.date.accessioned2020-12-10T19:38:59Z
dc.date.available2020-12-10T19:38:59Z
dc.date.issued2019-08-01
dc.description.abstractThe objective of this paper was to study the effect of pH. concentration and ionic species on the water absorption of the bionanocomposite hydrogels based on carboxymethylcellulose polysaccharide and laponite nanoclay. Bionanocomposite hydrogels were obtained via free radical polymerization. It was possible to observe that the swelling degree (Q) and kinetic properties were strongly influenced, and controlled, by the presence and quantity of ionic species, decreasing their water uptake when compared to the same values obtained in distilled water. Furthermore. the addition of nanoclay decreased the water uptake sensibility of the hydrogel in ionic media. It was also observed that the presence of the nanoclay decreased the Q(eq) distilled water values from 32.5 g to 22.5 g g(-1). The pKa variation of the bionanocomposites was a good indication of the possible interaction of the nanoclay-polymeric chains. The possibility of the control of water absorption (velocity and quantity) whereas these nanocomposites are pH- and salt-responsive may potentiate their application in agriculture. Agronomical studies are in progress. which can confirm its applicability in this area.en
dc.description.affiliationUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.description.affiliationFEIS, Programa Posgrad Ciencia Mat PPGCEM, Grp Compositos & Nanocompositos Hibridos, Ilha Solteira, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Engn Ilha Solteira, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP, Brazil
dc.format.extent831-837
dc.identifierhttp://dx.doi.org/10.21577/0100-4042.20170396
dc.identifier.citationQuimica Nova. Sao Paulo: Soc Brasileira Quimica, v. 42, n. 8, p. 831-837, 2019.
dc.identifier.doi10.21577/0100-4042.20170396
dc.identifier.fileS0100-40422019004800831.pdf
dc.identifier.issn0100-4042
dc.identifier.scieloS0100-40422019004800831
dc.identifier.urihttp://hdl.handle.net/11449/196263
dc.identifier.wosWOS:000491934800002
dc.language.isopor
dc.publisherSoc Brasileira Quimica
dc.relation.ispartofQuimica Nova
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectnanoclay
dc.subjectswelling degree
dc.subjectkinetic properties
dc.subjectcarboxymethylcellulose
dc.subjectpKa
dc.titleEFFECT OF PH, IONIC CONCENTRATION AND SPECIES ON THE ABSORPTION OF WATER BY HYDROGEL BIONANOCOMPOSITS CONSTITUTED FROM CMC/PAAm/ LAPONITE RDSen
dc.typeArtigo
dcterms.rightsHolderSoc Brasileira Quimica

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