Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/46607

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dc.contributor.authorCoelho, Dorapor
dc.contributor.authorSampaio, Anapor
dc.contributor.authorSilva, Carla J. S. M.por
dc.contributor.authorFelgueiras, Helena Pradopor
dc.contributor.authorAmorim, M. T. Pessoa depor
dc.contributor.authorZille, Andreapor
dc.date.accessioned2017-10-09T16:54:34Z-
dc.date.available2017-10-09T16:54:34Z-
dc.date.issued2017-08-28-
dc.identifier.citationDora Coelho, Ana Sampaio, Carla J. S. M. Silva, Helena P. Felgueiras, M. Teresa P. Amorim, and Andrea Zille (2017). Antibacterial Electrospun Poly(vinyl alcohol)/Enzymatic Synthesized Poly(catechol) Nanofibrous Midlayer Membrane for Ultrafiltration. ACS Applied Materials & Interfaces 2017 9 (38), 33107-33118 DOI: 10.1021/acsami.7b09068por
dc.identifier.issn1944-8244por
dc.identifier.urihttp://hdl.handle.net/1822/46607-
dc.description.abstractTwo different nanofibrous antibacterial membranes containing enzymatically synthesized poly(catechol) (PC) or silver nitrate (AgNO3, positive control) blended with poly(vinyl alcohol) (PVA) and electrospun onto a poly(vinylidene fluoride) (PVDF) basal disc to generate thin-film composite mid-layers were produced for water ultrafiltration applications. The developed membranes were thoroughly characterized in terms of morphology, chemical composition and general mechanical and thermal features, antimicrobial activity and ultrafiltration capabilities. The electrospun blends were recognized as homogeneous. Data revealed relevant conformational changes in the PVA side groups, attributed to hydrogen bonding, and high thermal stability and residual mass. PVDF+PVA/AgNO3 membrane displayed 100% growth inhibition of both Gram-positive and Gram-negative bacteria strains, despite the wide range of fiber diameters generated, from 24 to 125 nm, formation of numerous beads and irregular morphology. The PVDF+PVA/PC membrane showed a good growth inhibition of Staphylococcus aureus (92%) and revealed a smooth morphology, with no relevant bead formations and diameters ranging from 68 to 131 nm. The ultrafiltration abilities of the membrane containing PVA/PC were tested in a dead-end high-pressure cell (4 bar) using a reactive dye in distilled water and seawater. After 5 cycles, a maximum rejection of ≈ 85% with an average flux rate of 70 L m-2 h-1 for distilled water and ≈ 64% with an average flux rate of 62 L m-2 h-1 for seawater were determined with an overall salt rejection of ≈ 5%.por
dc.description.sponsorshipThis work was funded by FEDER funds through the Operational Competitiveness Programme – COMPETE and by National Funds through Fundação para a Ciência e Tecnologia (FCT) –under the project FCOMP-01-0124-FEDER-009389 (PTDC/CTM/100627/2008). A. Zille and H. P. Felgueiras also acknowledge funding from FCT within the scope of the project POCI-01-0145-FEDER-007136 and UID/CTM/00264.por
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.relationinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/100627/PTpor
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147331/PTpor
dc.rightsopenAccesspor
dc.subjectElectrospinningpor
dc.subjectLaccasepor
dc.subjectUltrafiltrationpor
dc.subjectPoly(catechol)por
dc.subjectEnzymepor
dc.subjectNanofiberpor
dc.subjectpoly(vinyl alcohol)por
dc.subjectcatecholpor
dc.subjectsilver nitratepor
dc.subjectelectrospinning membranepor
dc.subjectwater filtrationpor
dc.subjectmembranepor
dc.titleAntibacterial electrospun PVA/Enzymatic synthesized poly(catechol) nanofibrous mid-layer membrane for ultrafiltrationpor
dc.typearticlepor
dc.peerreviewedyespor
oaire.citationStartPage33107por
oaire.citationEndPage33118por
oaire.citationIssue38por
oaire.citationVolume9por
dc.identifier.doi10.1021/acsami.7b09068por
dc.subject.fosEngenharia e Tecnologia::Engenharia dos Materiaispor
dc.description.publicationversioninfo:eu-repo/semantics/publishedVersionpor
dc.subject.wosScience & Technologypor
sdum.journalACS Applied Materials and Interfacespor
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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