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Fonctionnalisation antibactérienne de structures textiles filtrantes en nontissés

Abstract : This study aims to functionalize poly(ethylene terephthalate) (PET) and poly(propylene) (PP) nonwovens by using quaternary ammonium molecules and functional polymers. The surface modification of these structures is used to give it an antibacterial activity. The several active substances were applied by padding, with or without a surface pre-activation by atmospheric pressure air plasma treatment (only for the PET nonwovens). Physical, chemical and biological characterizations were carried out on the treated samples using various techniques such as: wettability, zeta potential, air permeability, cell vitality and antibacterial activity. An optimization of the functionalization process leads us to a reduced number of washes after the active substances deposition. Some functionalized nonwovens exhibit satisfying antibacterial activity (4-log reduction) with S. Aureus, using a process that can be readily applied industrially. The antibacterial properties depend not only on the nature of the active substances but also on the structural parameters of nonwovens. The zeta potential was found to be a relevant tool to prove the surface modification of the treated nonwovens. It also allows us to appreciate the treatment distribution in function of the chemical nature of the active substance.
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Submitted on : Wednesday, November 18, 2020 - 11:52:51 AM
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Gwladys Bénistant. Fonctionnalisation antibactérienne de structures textiles filtrantes en nontissés. Physique [physics]. Université de Valenciennes et du Hainaut-Cambrésis, 2010. Français. ⟨NNT : 2010VALE0051⟩. ⟨tel-03011817⟩

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