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Modification of melt-blown polypropylene filters with spent green tea-mediated green synthesis of nanosilver for antibacterial activities and air purification
Air pollution containing microorganisms presents a significant risk to human health. It is crucial to create air filters that are highly efficient for air purification and conducive to human health. Hence, this work aims to develop a filter based on melt-blown polypropylene (PP) spray-coated with gr...
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Published in: | Research on chemical intermediates 2024-10, Vol.50 (10), p.4965-4981 |
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Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites |
Online Access: | Get full text |
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Summary: | Air pollution containing microorganisms presents a significant risk to human health. It is crucial to create air filters that are highly efficient for air purification and conducive to human health. Hence, this work aims to develop a filter based on melt-blown polypropylene (PP) spray-coated with green-synthesized silver nanoparticles (AgNPs). A bio-reducing agent from extracted spent green tea (SGT) was used in the AgNPs synthesis. Polyvinyl alcohol cross-linked with citric acid was used as a binder in spray coating. Effects of silver nitrate (AgNO
3
) concentrations, viz. 50, 100, and 150 mM, were investigated on AgNP formation and properties of spray-coated PP filter. Based on the results, the spray-coated PP filter with synthesized AgNP at 100 mM AgNO
3
(AgNPs-100) showed the highest inhibition zones of both
Gram-positive
and
Gram-negative
bacteria. The tensile strength of the spray-coated PP filter with AgNPs ranged from 1309–1478 kPa, which was higher than that of the neat PP filter. The particle filtration efficiency of the spray-coated PP filter with AgNPs-100 for various particle sizes was enhanced by 27.95–447.04% compared to the neat PP filter. Moreover, the particle filtration efficiency of the spray-coated filter with AgNPs-100 was higher than 97% for particles of 0.3 μm, including PM1.0 and PM2.5. Therefore, the proposed spray-coated PP filter had a high potential to be a promising disinfecting filter for biomedical and hygienic applications. |
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ISSN: | 0922-6168 1568-5675 |
DOI: | 10.1007/s11164-024-05387-2 |