Solvent permeability in commercial ultrafiltration polymeric membranes and evaluation of the structural and chemical stability towards hexane

dc.creatorAraki, MD
dc.creatorCoutinho, CD
dc.creatorGoncalves, LAG
dc.creatorViotto, LA
dc.date2010
dc.date47119
dc.date2014-11-19T08:09:40Z
dc.date2015-11-26T17:04:07Z
dc.date2014-11-19T08:09:40Z
dc.date2015-11-26T17:04:07Z
dc.date.accessioned2018-03-28T23:52:22Z
dc.date.available2018-03-28T23:52:22Z
dc.identifierSeparation And Purification Technology. Elsevier Science Bv, v. 71, n. 1, n. 13, n. 21, 2010.
dc.identifier1383-5866
dc.identifier1873-3794
dc.identifierWOS:000274495200002
dc.identifier10.1016/j.seppur.2009.10.005
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/71868
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/71868
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/71868
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279273
dc.descriptionThe 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.
dc.description71
dc.description1
dc.description13
dc.description21
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationSeparation And Purification Technology
dc.relationSep. Purif. Technol.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectPolymeric membranes
dc.subjectPermeability
dc.subjectSolvents
dc.subjectHexane
dc.subjectPVDF
dc.subjectStability
dc.subjectThrough Nanofiltration Membranes
dc.subjectOrganic-solvents
dc.subjectResistant Nanofiltration
dc.subjectPerformance
dc.subjectTransport
dc.subjectEthanol
dc.subjectWater
dc.subjectFlux
dc.titleSolvent permeability in commercial ultrafiltration polymeric membranes and evaluation of the structural and chemical stability towards hexane
dc.typeArtículos de revistas


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