Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/71868
Full metadata record
DC FieldValueLanguage
dc.contributor.CRUESPUniversidade Estadual de Campinaspt
dc.typeArtigo de periódicopt
dc.titleSolvent permeability in commercial ultrafiltration polymeric membranes and evaluation of the structural and chemical stability towards hexanept
dc.contributor.authorAraki, MDpt
dc.contributor.authorCoutinho, CDpt
dc.contributor.authorGoncalves, LAGpt
dc.contributor.authorViotto, LApt
unicamp.author.emailfea.marcia@gmail.compt
unicamp.authorAraki, Marcia de Souza Viotto, Luiz Antonio Univ Estadual Campinas, Fac Food Engn, Dept Food Engn, Lab Phys Measures Lamef, BR-13083862 Campinas, SP, Brazilpt
unicamp.authorCoutinho, Cesar de Morais Goncalves, Lireny A. G. Univ Estadual Campinas, Fac Food Engn, Dept Food Technol, Lab Fats & Oils LOG, BR-13083862 Campinas, SP, Brazilpt
dc.subjectPolymeric membranespt
dc.subjectPermeabilitypt
dc.subjectSolventspt
dc.subjectHexanept
dc.subjectPVDFpt
dc.subjectStabilitypt
dc.subject.wosThrough Nanofiltration Membranespt
dc.subject.wosOrganic-solventspt
dc.subject.wosResistant Nanofiltrationpt
dc.subject.wosPerformancept
dc.subject.wosTransportpt
dc.subject.wosEthanolpt
dc.subject.wosWaterpt
dc.subject.wosFluxpt
dc.description.abstractThe membrane technology application in the vegetable oil processing is associated to the hexane recovery from the miscella obtained during the extraction, degumming and subsequent refining stages, where the presence of the hexane results in higher permeate flux. However, the development of this technological alternative depends on membrane chemical stability. The objective of this work was to evaluate six flatsheet polymeric membranes in relation water affinity, permeability and flux of water, ethanol and hexane, with the purpose of characterizing their hydrophobic and hydrophilic profiles and resistance to hexane. The equipment used was a stirred cell. The following commercial flat membranes were used: 30 kDa and 50 kDa PVDF (polyvinylidene fluoride); 10 kDa PES (polyethersulfone); 0.05 mu m PC (polycarbonate); 0.05 mu m and 0.025 mu m CME (mixed cellulose esters). Membrane permeability with water, ethanol and hexane was evaluated in a laboratory unit at 4 bar, 200 rpm and 40 degrees C. Regarding flux rates with the tested solvents, the 50 kDa PVDF membrane revealed the highest permeability to water, two of the membranes were characterized as less hydrophilic (PC and PES) and the remaining ones were more hydrophobic. The membrane structural stability towards the hexane was verified by visual observation, filtering area variation (shortening or intumescence) and permeate flux assessments. The permeation with hexane was conducted for 12 h, at 1.5 bar, 200 rpm and 40 degrees C, with constant flux in all of the membranes during the experiment. Membranes untreated, submersed in hexane for 48 h and submitted to hexane permeation for 12 h were examined by scanning electron microscopy (SEM) in order to verify possible microscopic alterations. All the membranes were hexane-resistant, indicating that they are suitable for use with this solvent. (C) 2009 Elsevier B.V. All rights reserved.pt
dc.relation.ispartofSeparation And Purification Technologypt_BR
dc.relation.ispartofabbreviationSep. Purif. Technol.pt
dc.publisher.cityAmsterdampt
dc.publisher.countryHolandapt
dc.publisherElsevier Science Bvpt
dc.date.issued2010pt
dc.date.monthofcirculation47119pt
dc.identifier.citationSeparation And Purification Technology. Elsevier Science Bv, v. 71, n. 1, n. 13, n. 21, 2010.pt
dc.language.isoenpt
dc.description.volume71pt
dc.description.issuenumber1pt
dc.description.initialpage13pt
dc.description.lastpage21pt
dc.rightsfechadopt
dc.rights.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policypt
dc.sourceWeb of Sciencept
dc.identifier.issn1383-5866pt
dc.identifier.eissn1873-3794pt
dc.identifier.wosidWOS:000274495200002pt
dc.identifier.doi10.1016/j.seppur.2009.10.005pt
dc.date.available2014-11-19T08:09:40Z
dc.date.available2015-11-26T17:04:07Z-
dc.date.accessioned2014-11-19T08:09:40Z
dc.date.accessioned2015-11-26T17:04:07Z-
dc.description.provenanceMade available in DSpace on 2014-11-19T08:09:40Z (GMT). No. of bitstreams: 1 WOS000274495200002.pdf: 1126358 bytes, checksum: 6d298c20589854676563f432331d4dea (MD5) Previous issue date: 2010en
dc.description.provenanceMade available in DSpace on 2015-11-26T17:04:07Z (GMT). No. of bitstreams: 2 WOS000274495200002.pdf: 1126358 bytes, checksum: 6d298c20589854676563f432331d4dea (MD5) WOS000274495200002.pdf.txt: 54765 bytes, checksum: cb74106acefe2de3e5c1fffca33ef565 (MD5) Previous issue date: 2010en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/71868pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/71868
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/71868-
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000274495200002.pdf1.1 MBAdobe PDFView/Open


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