Modified Nanofibrous Filters with Durable Antibacterial Properties

The main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the...

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Main Authors: Ganna Ungur, Jakub Hrůza
Format: Article
Language:English
Published: MDPI AG 2021-02-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/26/5/1255
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author Ganna Ungur
Jakub Hrůza
author_facet Ganna Ungur
Jakub Hrůza
author_sort Ganna Ungur
collection DOAJ
description The main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the aggregation tendency of particles depending on their size. Modified solutions were electrospun by the Nanospider technique. The roller spinning electrode with a needle surface and static wire electrode were used for the production of functionalized nanofibers. The antibacterial properties of the modified nanofibrous layers were studied under simulated conditions of water and air filtration. Particular attention was paid to the fixation mechanism of modifiers in the structure of filters. It was determined that the rotating electrode with the needle surface is more efficient for the spinning of composite solutions due to the continuous mixing and the avoidance of particle precipitation at the bottom of the bath with modified polyurethane. Moreover, it was possible to state that microparticles of copper oxide are more appropriate antimicrobial additives due to their weaker aggregation tendency but stronger fixation in the fibrous structure than nanoparticles. From the results, it is possible to conclude that nanofibers with well-studied durable antibacterial properties may be recommended as excellent materials for water and air filtration applications.
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spelling doaj.art-795531b89807432e827fa193a9d126102023-12-11T18:30:41ZengMDPI AGMolecules1420-30492021-02-01265125510.3390/molecules26051255Modified Nanofibrous Filters with Durable Antibacterial PropertiesGanna Ungur0Jakub Hrůza1Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46001 Liberec, Czech RepublicInstitute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, 46001 Liberec, Czech RepublicThe main aims of the research were to produce efficient nanofibrous filters with long-term antibacterial properties and to confirm the functionality of samples under real filtration conditions. A polyurethane solution was modified by micro- or nanoparticles of copper oxide in order to juxtapose the aggregation tendency of particles depending on their size. Modified solutions were electrospun by the Nanospider technique. The roller spinning electrode with a needle surface and static wire electrode were used for the production of functionalized nanofibers. The antibacterial properties of the modified nanofibrous layers were studied under simulated conditions of water and air filtration. Particular attention was paid to the fixation mechanism of modifiers in the structure of filters. It was determined that the rotating electrode with the needle surface is more efficient for the spinning of composite solutions due to the continuous mixing and the avoidance of particle precipitation at the bottom of the bath with modified polyurethane. Moreover, it was possible to state that microparticles of copper oxide are more appropriate antimicrobial additives due to their weaker aggregation tendency but stronger fixation in the fibrous structure than nanoparticles. From the results, it is possible to conclude that nanofibers with well-studied durable antibacterial properties may be recommended as excellent materials for water and air filtration applications.https://www.mdpi.com/1420-3049/26/5/1255nanofibersfiltrationpolyurethanecopper oxidemicroparticlesnanoparticles
spellingShingle Ganna Ungur
Jakub Hrůza
Modified Nanofibrous Filters with Durable Antibacterial Properties
Molecules
nanofibers
filtration
polyurethane
copper oxide
microparticles
nanoparticles
title Modified Nanofibrous Filters with Durable Antibacterial Properties
title_full Modified Nanofibrous Filters with Durable Antibacterial Properties
title_fullStr Modified Nanofibrous Filters with Durable Antibacterial Properties
title_full_unstemmed Modified Nanofibrous Filters with Durable Antibacterial Properties
title_short Modified Nanofibrous Filters with Durable Antibacterial Properties
title_sort modified nanofibrous filters with durable antibacterial properties
topic nanofibers
filtration
polyurethane
copper oxide
microparticles
nanoparticles
url https://www.mdpi.com/1420-3049/26/5/1255
work_keys_str_mv AT gannaungur modifiednanofibrousfilterswithdurableantibacterialproperties
AT jakubhruza modifiednanofibrousfilterswithdurableantibacterialproperties