Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/74744
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleSuperabsorbent hydrogel composed of covalently crosslinked gum arabic with fast swelling dynamicspt_BR
dc.contributor.authorFavaro, SLpt_BR
dc.contributor.authorde Oliveira, Fpt_BR
dc.contributor.authorReis, AVpt_BR
dc.contributor.authorGuilherme, MRpt_BR
dc.contributor.authorMuniz, ECpt_BR
dc.contributor.authorTambourgi, EBpt_BR
unicamp.author.emailmarcos-rogerio.guilherme@orange.frpt_BR
unicamp.authorGuilherme, Marcos R. Tambourgi, Elias B. Univ Estadual Campinas, Fac Engn Quim, Dept Sistemas Quim & Informat, BR-13081970 Campinas, SP, Brazilpt_BR
unicamp.authorFavaro, Silvia L. de Oliveira, Fernando Reis, Adriano V. Muniz, Edvani C. Univ Estadual Maringa, Dept Quim, Grp Mat Polimer Composite, Maringa, Parana, Brazilpt_BR
dc.subjectdiffusionpt_BR
dc.subjecthydrogelspt_BR
dc.subjectmechanical propertiespt_BR
dc.subjectpolysaccharidespt_BR
dc.subjectswellingpt_BR
dc.subject.wosPolysaccharidept_BR
dc.subject.wosBehaviorpt_BR
dc.subject.wosPolymerpt_BR
dc.subject.wosLinkingpt_BR
dc.subject.wosCopolymerizationpt_BR
dc.subject.wosReleasept_BR
dc.subject.wosEdemaspt_BR
dc.subject.wosAcidpt_BR
dc.description.abstractA superabsorbent hydrogel (SH) with fast swelling dynamics and good mechanical stability in the swollen state was prepared. The SH was obtained from chemically modified gum arabic (MGA) with glycidyl methacrylate (GMA), acrylic acid (AAc), and acrylamide (AAm). The water-transport mechanisms and equilibrium swelling ratio (SR) were the parameters used to describe the water-absorption profile of SH. A 2(3) factorial design with a central point was built to evaluate the influence of the chemical modification of gum arabic (GA) on the SH sensitivity to water. The main effects of the temperature and amount of GMA and the interaction effect of the temperature and amount of GMA on the SR responses were statistically significant. It was demonstrated that the amount of GMA had a more prominent effect on gel swelling. Lower elastic modulus values for the SH were found when a decreased amount of GMA was used (0.05 g), which produced an SH with a high SR capacity. The SH matrix consisting of 3.0 g of AAc, 0.5 g of AAm, and 0.5 g of MGA was more suitable to absorb a large amount of water (SR = 503.17 +/- 22.65 within 60 min of water immersion) without its mechanical stability being affected. Better GA modifying conditions to produce such an SH were as follows: 60 degrees C for the temperature, 24 h for the time of MGA, and 0.05 g for the amount of GMA. It exhibited a diffusional exponent higher than 0.89, which corresponded to the supercase II type of penetrating transport mechanism, indicating that its water-absorption mechanism exclusively depended on the macromolecular relaxation of the polymer chains. (c) 2007 Wiley Periodicals, Inc.pt
dc.relation.ispartofJournal Of Applied Polymer Sciencept_BR
dc.relation.ispartofabbreviationJ. Appl. Polym. Sci.pt_BR
dc.publisher.cityHobokenpt_BR
dc.publisher.countryEUApt_BR
dc.publisherJohn Wiley & Sons Incpt_BR
dc.date.issued2008pt_BR
dc.date.monthofcirculationFEB 5pt_BR
dc.identifier.citationJournal Of Applied Polymer Science. John Wiley & Sons Inc, v. 107, n. 3, n. 1500, n. 1506, 2008.pt_BR
dc.language.isoenpt_BR
dc.description.volume107pt_BR
dc.description.issuenumber3pt_BR
dc.description.firstpage1500pt_BR
dc.description.lastpage1506pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.htmlpt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0021-8995pt_BR
dc.identifier.wosidWOS:000251769700018pt_BR
dc.identifier.doi10.1002/app.27140pt_BR
dc.date.available2014-11-13T21:39:00Z
dc.date.available2015-11-26T17:11:36Z-
dc.date.accessioned2014-11-13T21:39:00Z
dc.date.accessioned2015-11-26T17:11:36Z-
dc.description.provenanceMade available in DSpace on 2014-11-13T21:39:00Z (GMT). No. of bitstreams: 1 WOS000251769700018.pdf: 164050 bytes, checksum: c05803fd097109549068732a3bb579f9 (MD5) Previous issue date: 2008en
dc.description.provenanceMade available in DSpace on 2015-11-26T17:11:36Z (GMT). No. of bitstreams: 2 WOS000251769700018.pdf: 164050 bytes, checksum: c05803fd097109549068732a3bb579f9 (MD5) WOS000251769700018.pdf.txt: 26241 bytes, checksum: c56b188d2c781f7908c400180b4a4739 (MD5) Previous issue date: 2008en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/74744pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/74744
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/74744-
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000251769700018.pdf160.21 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.