Title
Bacterial deposition to fluoridated and non-fluoridated polyurethane coatings with different elastic modulus and surface tension in a parallel plate and a stagnation point flow chamber
Author
Bakker, D.P.
Huijs, F.M.
de Vries, J.
Klijnstra, J.W.
Busscher, H.J.
van der Mei, H.C.
Publication year
2003
Abstract
Deposition of three marine bacterial strains with different cell surface hydrophobicities from artificial seawater to polyurethane coatings on glass with different surface tensions and elastic modulus was studied in situ in a parallel plate (PP) and stagnation point (SP) flow chamber. Different surface tensions of the coatings were established by changing the amount of fluorine, whereas using more or less branched polymers made different elastic moduli. Surface tensions of the coating, derived from measured contact angles with liquids, ranged from 11.9 to 44.9 mJ m-2, while the elastic moduli, derived from force-distance curves as measured with an atomic force microscope were between 1.5 and 2.2 GPa. In both flow chambers, the most hydrophilic bacterium Halomonas pacifica adhered preferentially to the more hydrophilic, non-fluoridated coating, whereas the most hydrophobic bacterium Marinobacter hydrocarbonoclasticus showed a greater preference for the more hydrophobic coating. Bacterial adhesion in the PP flow chamber was not influenced by the elastic modulus of the coatings, but in the SP flow chamber bacteria adhered in higher numbers to hard surfaces than to coatings of lower elastic moduli. © 2003 Elsevier B.V. All rights reserved.
Subject
Bacterial deposition
Marine bacteria
Surface tension
Elastic moduli
Hydrophobicity
Polyurethanes
Surface tension
Flow chambers
Organic coatings
Atomic force microscopy
Bioaccumulation
Cell surface
Hydrophilicity
Material coating
Strain difference
Surface property
Surface tension
Bacteria (microorganisms)
Halomonas pacifica
Marinobacter hydrocarbonoclasticus
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TNO identifier
237370
ISSN
0927-7765
Source
Colloids and Surfaces B: Biointerfaces, 32 (3), 179-190
Document type
article