Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique
Silver nanoparticles were loaded in microfiltration membranes by sputtering technique for the development of biocidal properties and biofouling resistance. This technology allows good adhesion between silver nanoparticles and the membranes, and fast deposition rate. The microfiltration membranes (15...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/8/1686 |
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| author | Aline M. F. Linhares Cristiano P. Borges Fabiana V. Fonseca |
| author_facet | Aline M. F. Linhares Cristiano P. Borges Fabiana V. Fonseca |
| author_sort | Aline M. F. Linhares |
| collection | DOAJ |
| description | Silver nanoparticles were loaded in microfiltration membranes by sputtering technique for the development of biocidal properties and biofouling resistance. This technology allows good adhesion between silver nanoparticles and the membranes, and fast deposition rate. The microfiltration membranes (15 wt.% polyethersulfone and 7.5 wt.% polyvinylpyrrolidone in <i>N</i>,<i>N</i>-dimethylacetamide) were prepared by phase inversion method, and silver nanoparticles were deposited on their surface by the physical technique of vapor deposition in a sputtering chamber. The membranes were characterized by Field Emission Scanning Electron Microscopy, and the presence of silver was investigated by Energy-Dispersive Spectroscopy and X-ray Diffraction. Experiments of silver leaching were carried out through immersion and filtration tests. After 10 months of immersion in water, the membranes still presented ~90% of the initial silver, which confirms the efficiency of the sputtering technique. Moreover, convective experiments indicated that 98.8% of silver remained in the membrane after 24 h of operation. Biocidal analyses (disc diffusion method and biofouling resistance) were performed against <i>Pseudomonas aeruginosa</i> and confirmed the antibacterial activity of these membranes with 0.6 and 0.7 log reduction of viable planktonic and sessile cells, respectively. These results indicate the great potential of these new membranes to reduce biofouling effects. |
| first_indexed | 2024-03-10T18:08:45Z |
| format | Article |
| id | doaj.art-1565fea96537444fb5e499c5998cd68f |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T18:08:45Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-1565fea96537444fb5e499c5998cd68f2023-11-20T08:17:21ZengMDPI AGPolymers2073-43602020-07-01128168610.3390/polym12081686Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering TechniqueAline M. F. Linhares0Cristiano P. Borges1Fabiana V. Fonseca2School of Chemistry, Federal University of Rio de Janeiro, Horacio Macedo Av, 2030, Technology Center, I-124, University City, Rio de Janeiro 21941-909, BrazilChemical Engineering Program, COPPE, Federal University of Rio de Janeiro, Horacio Macedo Av, 2030, Technology Center, G-115, University City, Rio de Janeiro 21941-450, BrazilSchool of Chemistry, Federal University of Rio de Janeiro, Horacio Macedo Av, 2030, Technology Center, I-124, University City, Rio de Janeiro 21941-909, BrazilSilver nanoparticles were loaded in microfiltration membranes by sputtering technique for the development of biocidal properties and biofouling resistance. This technology allows good adhesion between silver nanoparticles and the membranes, and fast deposition rate. The microfiltration membranes (15 wt.% polyethersulfone and 7.5 wt.% polyvinylpyrrolidone in <i>N</i>,<i>N</i>-dimethylacetamide) were prepared by phase inversion method, and silver nanoparticles were deposited on their surface by the physical technique of vapor deposition in a sputtering chamber. The membranes were characterized by Field Emission Scanning Electron Microscopy, and the presence of silver was investigated by Energy-Dispersive Spectroscopy and X-ray Diffraction. Experiments of silver leaching were carried out through immersion and filtration tests. After 10 months of immersion in water, the membranes still presented ~90% of the initial silver, which confirms the efficiency of the sputtering technique. Moreover, convective experiments indicated that 98.8% of silver remained in the membrane after 24 h of operation. Biocidal analyses (disc diffusion method and biofouling resistance) were performed against <i>Pseudomonas aeruginosa</i> and confirmed the antibacterial activity of these membranes with 0.6 and 0.7 log reduction of viable planktonic and sessile cells, respectively. These results indicate the great potential of these new membranes to reduce biofouling effects.https://www.mdpi.com/2073-4360/12/8/1686silver nanoparticlesmicrofiltrationmembranesbiofoulingsputtering |
| spellingShingle | Aline M. F. Linhares Cristiano P. Borges Fabiana V. Fonseca Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique Polymers silver nanoparticles microfiltration membranes biofouling sputtering |
| title | Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique |
| title_full | Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique |
| title_fullStr | Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique |
| title_full_unstemmed | Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique |
| title_short | Investigation of Biocidal Effect of Microfiltration Membranes Impregnated with Silver Nanoparticles by Sputtering Technique |
| title_sort | investigation of biocidal effect of microfiltration membranes impregnated with silver nanoparticles by sputtering technique |
| topic | silver nanoparticles microfiltration membranes biofouling sputtering |
| url | https://www.mdpi.com/2073-4360/12/8/1686 |
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