Argentina | info:eu-repo/semantics/article
dc.creatorMéndez, Mercedes Liliana
dc.creatorRomero, Analía Irma
dc.creatorRajal, Verónica Beatriz
dc.creatorCastro Vidaurre, Elza Fani
dc.creatorCalvo, José I.
dc.creatorPalacio, Laura
dc.creatorHernandez, Antonio
dc.date.accessioned2021-04-06T13:58:26Z
dc.date.accessioned2022-10-15T07:11:54Z
dc.date.available2021-04-06T13:58:26Z
dc.date.available2022-10-15T07:11:54Z
dc.date.created2021-04-06T13:58:26Z
dc.date.issued2013-04
dc.identifierMéndez, Mercedes Liliana; Romero, Analía Irma; Rajal, Verónica Beatriz; Castro Vidaurre, Elza Fani; Calvo, José I.; et al.; Properties of polyethersulfone ultrafiltration membranes modified with polyethylene glycols; John Wiley & Sons Inc; Polymer Engineering and Science; 54; 5; 4-2013; 1211-1221
dc.identifier0032-3888
dc.identifierhttp://hdl.handle.net/11336/129426
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4359092
dc.description.abstractPolyethersulfone ultrafiltration membranes have been prepared using polyethylene glycols (PEGs) of 400, 1000, and 10,000 gmol, as additive with dimethylacetamide as solvent. Infrared analysis proves that PEG leaves almost completely the surface of the membranes after 24 h of water immersion. Scanning electron microscopy, contact angle, and liquid-liquid displacement porometry have been used to characterize the membrane morphology, surface hydrophilicity and porous structure. The relative flux reduction factor, flux, retention - of PEG (20,000 and 35,000 g/mol) and bovine serum albumin (67,000 g/mol) - and pure water permeability have been measured for the membranes. Results show that the addition of PEG increases slightly hydrophilicity and decreases pore size and narrows the corresponding pore size distribution while thickening the skin layer, in spite of the fast disappearance of the added PEG form the membrane surface. The resulting flux and pure water permeability are higher when middle size PEGs are added but decrease again when very high molecular weight (MW) PEGs are added. Retention decreases initially for increasing MWs of PEG although for very long PEG chains (MW of 10,000 g/mol) retention increases again. After filtration, the membranes with PEG added showed a lower relative flux reduction that decreases for increasing MW of the added PEGs.
dc.languageeng
dc.publisherJohn Wiley & Sons Inc
dc.relationinfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/pen.23637/abstract
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/pen.23637
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectpolyethersulphone membranes
dc.subjectultrafiltration membranes
dc.subjectmodified membranes
dc.subjectpolyethylene glycol
dc.titleProperties of polyethersulfone ultrafiltration membranes modified with polyethylene glycols
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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