Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/100528
Title: Antifouling membranes prepared by electrospinning polylactic acid containing biocidal nanoparticles
Authors: Dasari, Aravind
Quirós, Jennifer
Herrero, Berta
Boltes, Karina
García-Calvo, Eloy
Rosal, Roberto
Keywords: DRNTU::Engineering::Materials
Issue Date: 2012
Source: 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.
Series/Report no.: Journal of membrane science
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.
URI: https://hdl.handle.net/10356/100528
http://hdl.handle.net/10220/13625
DOI: 10.1016/j.memsci.2012.02.060
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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