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...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/100528 http://hdl.handle.net/10220/13625 |
| _version_ | 1826123721119629312 |
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| author | Dasari, Aravind Quirós, Jennifer Herrero, Berta Boltes, Karina García-Calvo, Eloy Rosal, Roberto |
| 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 |
| author_sort | Dasari, Aravind |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T06:09:17Z |
| format | Journal Article |
| id | ntu-10356/100528 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:09:17Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles |
| title_sort | antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/100528 http://hdl.handle.net/10220/13625 |
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