Titre :

Hydrophobicity of abiotic surfaces governs droplets deposition and evaporation patterns

Auteur(s) :

Richard, Elodie [Auteur]
Dubois, Thomas [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Allion-Maurer, Audrey [Auteur]
Jha, Piyush-Kumar [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Unité Matériaux et Transformations - UMR 8207 [UMET]
Faille, Christine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Titre de la revue :

Food Microbiology

Nom court de la revue :

Food Microbiology

Numéro :

91

Pagination :

103538

Éditeur :

Elsevier BV

Date de publication :

2020-10

ISSN :

0740-0020

Mot(s)-clé(s) en anglais :

Splash areas
Droplet evaporation
Bacillus spores
Deposition patterns
Hydrophobic material
Material topography

Discipline(s) HAL :

Sciences du Vivant [q-bio]/Ingénierie des aliments

Résumé en anglais : [en]

Surface contamination with droplets containing bacteria is of concern in the food industry and other environments where hygiene control is essential. Deposition patterns after the drying of contaminated droplets is affected ...
Lire la suite >Surface contamination with droplets containing bacteria is of concern in the food industry and other environments where hygiene control is essential. Deposition patterns after the drying of contaminated droplets is affected by numerous parameters. The present study evaluated the rate of evaporation and the shape of deposition patterns after the drying of water droplets on a panel of materials with different surface properties (topography, hydrophobicity). The influence of the particle properties (in this study 1 μm-microspheres and two bacterial spores) was also investigated. Polystyrene microspheres were hydrophobic, while Bacillus spores were hydrophilic or hydrophobic, and surrounded by different surface features. In contrast to material topography, hydrophobicity was shown to deeply affect droplet evaporation, with the formation of small, thick deposits with microspheres or hydrophilic spores. Among the particle properties, the spore morphology (size and round/ovoid shape) did not clearly affect the deposition pattern. Conversely, hydrophobic spores aggregated to form clusters, which quickly settled on the materials and either failed to migrate, or only migrated to a slight extent on the surface, resulting in a steady distribution of spores or spore clusters over the whole contaminated area. Adherent bacteria or spores are known to be highly resistant to many stressful environmental conditions. In view of all the quite different patterns obtained following drying of spore-containing droplets, it seems likely that some of these would entail enhanced resistance to hygienic processes.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Processus aux Interfaces et Hygiène des Matériaux (PIHM)

Date de dépôt :

2020-12-09T12:14:51Z