Bacterial detachment from hydrophilic and hydrophobic surfaces using a microjet impingement

被引:38
作者
Bayoudh, S [1 ]
Ponsonnet, L
Ben Ouada, H
Bakhrouf, A
Othmane, A
机构
[1] Fac Sci Monastir, Lab Phys & Chim Interfaces, Monastir 5000, Tunisia
[2] Univ Lyon 1, Ecole Cent, Ctr Genie Elect, F-69622 Villeurbanne, France
[3] Fac Sci Monastir, Lab Anal & Controle Polluants Chim & Biol Environ, Monastir 5000, Tunisia
[4] Fac Sci Monastir, Biophys Lab, Monastir 5000, Tunisia
关键词
bacterial adhesion; contact angle; adhesion energy; jet impingement; shear stress;
D O I
10.1016/j.colsurfa.2005.06.025
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this paper, we present the use of a submerged laminar microjet impingement to evaluate the adhesion strength of Pseudomonas stutzeri onto the hydrophilic glass and hydrophobic ITO-coated glass surfaces. The detachment strength of this bacterial strain was determined from the measurement of the shear and tensile stresses necessary to erode the adhered bacteria from both tested materials surfaces. Different combinations of Reynolds number and exposure time for each combination of bacteria/substratum were used in this work to examine their effect on the bacterial detachment. Furthermore, in a qualitative study, the hydrophobicity in terms of contact angle and surface free energy of both the bacteria and substrata was determined. Also, the adhesion free energy of the bacteria on both supporting materials was quantified using the thermodynamic approach of Lifshitz van der Waals and acid/base interactions. The adhesion strength measurements were found to be in agreement with the calculations of the adhesion free energies of the bacterial strain on both substrata. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:160 / 167
页数:8
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