Dasari, A. and Quirós, J. and Herrero, B. and Boltes, K. and García-Calvo, E. and Rosal, R. (2012) Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles. Journal of Membrane Science, 405. 134 - 140.
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Electrospinning, Polylactic acid, Membranes, Biocidal nanoparticles, Anti-biofouling |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
| Depositing User: | José Ángel Gómez Martín |
| Date Deposited: | 06 Mar 2013 13:08 |
| Last Modified: | 14 Mar 2013 16:18 |
| URI: | http://eprints.imdea-agua.org:13000/id/eprint/7 |
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