Title :

Atmospheric pressure plasma spraying of silane-based coatings targeting whey protein fouling and bacterial adhesion management

Author(s) :

Zouaghi, Sawsen [Auteur]
Six, Thierry [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bellayer, Séverine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Coffinier, Yannick [Auteur]
NanoBioInterfaces - IEMN [NBI - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Abdallah, Marwan [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Chihib, Nour-Eddine [Auteur]
Laboratoire de Procédés Biologiques, Génie Enzymatique et Microbien [ProBioGEM]
Andre, Christophe [Auteur]
Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] [IBMM]
Delaplace, Guillaume [Auteur]
Laboratoire de Génie des Procédés et Technologie Alimentaires [LGPTA]
Jimenez, Maude [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]

Journal title :

Applied Surface Science

Pages :

392-402

Publisher :

Elsevier

Publication date :

2018-10

ISSN :

0169-4332

Keyword(s) :

Silane

English keyword(s) :

Antifouling
Atmospheric pressure plasma spraying
Dairy pasteurization
HMDSO

HAL domain(s) :

Sciences de l'environnement/Ingénierie de l'environnement
Sciences de l'ingénieur [physics]

English abstract : [en]

This work aims at studying the impact of silane-based coatings, generated by atmospheric pressure plasma spraying (APPS) of a liquid precursor (hexamethydisiloxane – HMDSO), on dairy antifouling and antibacterial properties ...
Show more >This work aims at studying the impact of silane-based coatings, generated by atmospheric pressure plasma spraying (APPS) of a liquid precursor (hexamethydisiloxane – HMDSO), on dairy antifouling and antibacterial properties of food-grade 316L stainless steel. The influence of the manufacturing parameters (precursor flow rate, nozzle-to-substrate distance and scanning speed) on the coatings properties was investigated using a wide range of characterization techniques (drop shape analysis, X-Ray Mappings, Scanning Electron Microscopy, Fourier-Transformed Infrared Spectroscopy, Atomic Force Microscopy). Coating’s roughness in particular was shown to strongly increase when precursor flow rate increases. A pilot pasteurizer, fed with a model foulant solution (whey protein and calcium), allowed performing two consecutive industrial-like isothermal dairy fouling tests, revealing the promising anti-fouling properties of the HMDSO-coated steel. A fouling reduction of up to 90% compared to bare stainless steel was achieved after first cycle for all samples. The second fouling run allowed to select the best-performing sample, which kept the same antifouling properties as in the first test. Its mechanism of action was investigated, which revealed that a nanostructured, Si-O-Si rich surface was efficient to prevent isothermal dairy fouling. The adhesion of the pathogenic bacterium Staphylococcus aureus also proved to be impacted by this plasma coating, with a significant decrease of adhered cells (−30% compared to native stainless steel).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

ANR Project :

Design de surfaces anti-encrassantes pour les industries agroalimentaires

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL