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Biomimetic surface modifications of stainless steel targeting dairy fouling mitigation and bacterial adhesion
- Zouaghi, Sawsen, Bellayer, Séverine, Thomy, Vincent, Dargent, Thomas, Coffinier, Yannick, Andre, Christophe, Delaplace, Guillaume, Jimenez, Maude
- Food and bioproducts processing 2019 v.113 pp. 32-38
- antibacterial properties, bacterial adhesion, biomimetics, calcium, coatings, fouling, models, pasteurization, stainless steel, virulent strains, whey protein
- This work aims at presenting and comparing the antifouling and antibacterial behaviour of three biomimetic surfaces targeting dairy fouling reduction, namely atmospheric plasma-sprayed silane-based thin films, lubricated slippery surfaces and femtosecond laser textured lotus-like surfaces. Fouling tests were conducted on a pilot-scale pasteurization plant fed with a model whey protein and calcium foulant solution and tested samples were placed in isothermal holding-like conditions. Detailed characterizations of the substrates before and after fouling test allowed connecting their surface properties to their antifouling performances. The best result was obtained with the nano-rough plasma coatings which led to a substantial fouling reduction for two consecutive pasteurisation runs. These surfaces were subsequently tested towards bacterial adhesion with three different foodborne pathogenic strains, again demonstrating better performances than bare stainless steel.