Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles

We prepared non-woven electrospun polylactic acid (PLA) membranes containing functionalized sepiolite fibrillar particles (5 wt%). Biocidal activity was achieved by functionalizing sepiolite fibers with Ag (26 wt%) and Cu (26 wt%), which were embedded in the fiber surface. Sepiolite particles were n...

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Main Authors: Dasari, Aravind, Quirós, Jennifer, Herrero, Berta, Boltes, Karina, García-Calvo, Eloy, Rosal, Roberto
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
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Online Access:https://hdl.handle.net/10356/100528
http://hdl.handle.net/10220/13625
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1005282020-06-01T10:01:33Z Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles Dasari, Aravind Quirós, Jennifer Herrero, Berta Boltes, Karina García-Calvo, Eloy Rosal, Roberto School of Materials Science & Engineering DRNTU::Engineering::Materials We prepared non-woven electrospun polylactic acid (PLA) membranes containing functionalized sepiolite fibrillar particles (5 wt%). Biocidal activity was achieved by functionalizing sepiolite fibers with Ag (26 wt%) and Cu (26 wt%), which were embedded in the fiber surface. Sepiolite particles were negatively charged in all cases, with zeta potential in the range of −15 to −37 mV, increasing their negative charge with pH. The membranes were biofouled in a cross-flow filtration device using model biofoulants, cultures of Saccharomyces cerevisiae (pH 4.5) and Pseudomonas putida (pH 7.5), which were pumped across the membrane for 24/48 h. The assessment of active biomass was performed by measuring the concentration of adenosine-5′-triphosphate (ATP) in used membranes. The results showed a significant decrease in the amount of surface ATP for PLA loaded with Ag and Cu functionalized sepiolite. The effect was particularly intense for Ag-sepiolite in contact with Saccharomyces cerevisiae, where the reduction amounted to 85% compared to neat PLA (control). This was attributed to the differences in ion availability as a function of pH and to the presence of chloride ions in solution. Pristine sepiolite (without functionalization) did not show any noticeable effect. 2013-09-24T04:19:07Z 2019-12-06T20:24:03Z 2013-09-24T04:19:07Z 2019-12-06T20:24:03Z 2012 2012 Journal Article Dasari, A., Quirós, J., Herrero, B., Boltes, K., García-Calvo, E., & Rosal, R. (2012). Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles. Journal of membrane science, 405-406, 134-140. https://hdl.handle.net/10356/100528 http://hdl.handle.net/10220/13625 10.1016/j.memsci.2012.02.060 en Journal of membrane science
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Dasari, Aravind
Quirós, Jennifer
Herrero, Berta
Boltes, Karina
García-Calvo, Eloy
Rosal, Roberto
Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
description We prepared non-woven electrospun polylactic acid (PLA) membranes containing functionalized sepiolite fibrillar particles (5 wt%). Biocidal activity was achieved by functionalizing sepiolite fibers with Ag (26 wt%) and Cu (26 wt%), which were embedded in the fiber surface. Sepiolite particles were negatively charged in all cases, with zeta potential in the range of −15 to −37 mV, increasing their negative charge with pH. The membranes were biofouled in a cross-flow filtration device using model biofoulants, cultures of Saccharomyces cerevisiae (pH 4.5) and Pseudomonas putida (pH 7.5), which were pumped across the membrane for 24/48 h. The assessment of active biomass was performed by measuring the concentration of adenosine-5′-triphosphate (ATP) in used membranes. The results showed a significant decrease in the amount of surface ATP for PLA loaded with Ag and Cu functionalized sepiolite. The effect was particularly intense for Ag-sepiolite in contact with Saccharomyces cerevisiae, where the reduction amounted to 85% compared to neat PLA (control). This was attributed to the differences in ion availability as a function of pH and to the presence of chloride ions in solution. Pristine sepiolite (without functionalization) did not show any noticeable effect.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Dasari, Aravind
Quirós, Jennifer
Herrero, Berta
Boltes, Karina
García-Calvo, Eloy
Rosal, Roberto
format Article
author Dasari, Aravind
Quirós, Jennifer
Herrero, Berta
Boltes, Karina
García-Calvo, Eloy
Rosal, Roberto
author_sort Dasari, Aravind
title Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
title_short Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
title_full Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
title_fullStr Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
title_full_unstemmed Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
title_sort antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
publishDate 2013
url https://hdl.handle.net/10356/100528
http://hdl.handle.net/10220/13625
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