1. Exploring the antimicrobial properties of dark-operating ceramic-based nanocomposite materials for the disinfection of indoor air
- Author
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Lionel Sabourin, Alexei Evstratov, Arnaud Frering, Sandrine Bayle, Jose-Marie Lopez-Cuesta, Aliénor Dutheil de la Rochère, Centre des Matériaux des Mines d'Alès (C2MA), IMT - MINES ALES (IMT - MINES ALES), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Pôle RIME - Recherche sur les Interactions des Matériaux avec leur Environnement (RIME), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-IMT - MINES ALES (IMT - MINES ALES), Laboratoire de Génie de l'Environnement Industriel (LGEI), and European Project: 690968,H2020,H2020-MSCA-RISE-2015,NANOGUARD2AR(2016)
- Subjects
Chemical Radicals ,Ceramics ,Polymers ,Diffusion ,Composite number ,02 engineering and technology ,01 natural sciences ,Biochemistry ,Physical Chemistry ,Nanocomposites ,[SPI.MAT]Engineering Sciences [physics]/Materials ,Oxidative Damage ,Oxidizing agent ,Aluminum Oxide ,Electron Microscopy ,Ceramic ,Hydroxyl Radicals ,Polyvinyl Chloride ,Materials ,ComputingMilieux_MISCELLANEOUS ,Microscopy ,Multidisciplinary ,[SDE.IE]Environmental Sciences/Environmental Engineering ,Physics ,Abrasive ,Classical Mechanics ,021001 nanoscience & nanotechnology ,Antimicrobial ,Dynamics ,Anti-Bacterial Agents ,Chemistry ,Zinc ,Flow conditions ,Macromolecules ,visual_art ,Air Flow ,Air Pollution, Indoor ,Physical Sciences ,visual_art.visual_art_medium ,Medicine ,Scanning Electron Microscopy ,0210 nano-technology ,Research Article ,Chemical Elements ,Materials science ,Science ,Materials Science ,010402 general chemistry ,Research and Analysis Methods ,Aerodynamics ,Humans ,Indoor air, disinfection, germicidal composites ,Manganese ,Nanocomposite ,Bacteria ,Biology and Life Sciences ,Polymer Chemistry ,0104 chemical sciences ,Disinfection ,Chemical engineering ,Manganese Compounds ,Composite Materials ,Reactive Oxygen Species ,Disinfectants - Abstract
As people spend more and more time inside, the quality of indoor air becomes crucial matter. This study explores the germicidal potential of two dark-operating germicidal composite materials designed to be applied for the indoor air disinfection under flow conditions. The first material, MnO 2 /AlPO 4 /γ-Al 2 O 3 beads, is a donor-acceptor interactive composite capable of creating hydroxyl radicals HO.. The second one is a ZnO/γ-Al 2 O 3 material with inter-cropped hexagons on its surface. To determine the antimicrobial efficiency of these materials in lifelike conditions, a pilot device was constructed that allows the test of the materials in dynamic conditions and agar diffusion inhibitory tests were also conducted. The results of the tests showed that the MnO 2 /AlPO 4 /γ-Al 2 O 3 material has a germicidal effect in static conditions whereas ZnO/γ-Al 2 O 3 does not. In dynamic conditions, the oxidizing MnO 2 / AlPO 4 /γ-Al 2 O 3 material is the most efficient when using low air speed whereas the ZnO/γ-Al 2 O 3 one becomes more efficient than the other materials when increasing the air linear speed. This ZnO/γ-Al 2 O 3 dark-operating germicidal material manifests the ability to proceed the mechanical destruction of bacterial cells. Actually, the antimicrobial efficiency of materials in dynamic conditions varies regarding the air speed through the materials and that static tests are not representative of the behavior of the material for air disinfection. Depending on the conditions, the best strategy to inactivate microorganisms changes and abrasive structures are a field that needs further exploration as they are in most of the conditions tested the best way to quickly decrease the number of microorganisms.
- Published
- 2019
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