title: Elaboration of highly hydrophobic polymeric surface--a potential strategy to reduce the adhesion of pathogenic bacteria?
abstract: Different polymeric surfaces have been modified in order to reach a high hydrophobic character, indeed the superhydrophobicity property. For this purpose, polypropylene and polystyrene have been treated by RF or μwaves CF4 plasma with different volumes, the results were compared according to the density of injected power. The effect of pretreatment such as mechanical abrasion or plasma activation was also studied. The modified surfaces were shown as hydrophobic, or even superhydrophobic depending of defects density. They were characterized by measurement of wettability and roughness at different scales, i.e. macroscopic, mesoscopic and atomic. It has been shown that a homogeneous surface at the macroscopic scale could be heterogeneous at lower mesoscopic scale. This was associated with the crystallinity of the material. The bioadhesion tests were performed with Gram positive and negative pathogenic strains: Listeria monocytogenes, Pseudomonas aeruginosa and Hafnia alvei. They have demonstrated an antibacterial efficiency of very hydrophobic and amorphous PS treated for all strains tested and a strain-dependent efficiency with modified PP surface being very heterogeneous at the mesoscopic scale. Thus, these biological results pointed out not only the respective role of the surface chemistry and topography in bacterial adhesion, but also the dependence on the peaks and valley distribution at bacteria dimension scale.
authors.affiliation: Institut des Molécules et Matériaux du Mans (IMMM), département Polymères, Colloïdes et Interfaces, UMR CNRS 6283 Université LUNAM, av. O. Messiaen, 72085 Le Mans, France. fabienne.poncin-epaillard@univ-lemans.fr
authors.forename: F
authors.initials: F
authors.lastname: Poncin-Epaillard
authors.forename: J M
authors.initials: JM
authors.lastname: Herry
authors.forename: P
authors.initials: P
authors.lastname: Marmey
authors.forename: G
authors.initials: G
authors.lastname: Legeay
authors.forename: D
authors.initials: D
authors.lastname: Debarnot
authors.forename: M N
authors.initials: MN
authors.lastname: Bellon-Fontaine
mesh_terms: D001419:Bacteria / Q000187:drug effects* / Q000648:ultrastructure; D001422:Bacterial Adhesion / Q000187:drug effects*; D020611:Hafnia alvei / Q000187:drug effects / Q000648:ultrastructure; D054879:Halogenation / Q000187:drug effects; D057927:Hydrophobic and Hydrophilic Interactions / Q000187:drug effects*; D008089:Listeria monocytogenes / Q000187:drug effects / Q000648:ultrastructure; D018625:Microscopy, Atomic Force; D058626:Plasma Gases / Q000494:pharmacology; D011108:Polymers / Q000494:pharmacology*; D011126:Polypropylenes / Q000494:pharmacology; D011137:Polystyrenes / Q000494:pharmacology; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000648:ultrastructure; D017155:Wettability / Q000187:drug effects
chemical_list: D058626:Plasma Gases; D011108:Polymers; D011126:Polypropylenes; D011137:Polystyrenes
keywords: Adhesion; Bacteria; Hydrophobicity; Pathogen; Plasma