Cleanability assessment of model solid surfaces with a radial-flow cell

Detry, Jean; Rouxhet, Paul; Boulangé-Petermann, L.; Deroanne, Claude; Sindic, Marianne

doi:10.1016/j.colsurfa.2007.03.027

Cited by 17 publications

(28 citation statements)

References 24 publications

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“…The substrates were dried for 30 min in a dark cupboard at 20.6±1.9°C, with a relative humidity 39±3%. The specifications of these conditions were determined with a Testo 175-H2 logger (Testo, Germany) during three weeks and were in agreement with previous records (Detry et al 2007;.…”

Section: Soiling Proceduressupporting

confidence: 72%

“…The cleaning fluid used was distilled water and cleaning was performed at 20°C at controlled flow rates (40 or 390 ml/min) for 5 min. The flow rate was selected with the aim of comparing samples, according to previous studies (Detry et al 2007;. The sample was then removed and dried at room temperature.…”

Section: Cleaning Experimentsmentioning

confidence: 99%

“…However, recent studies showed that the conversion of critical radius into critical wall shear stress may be biased when the adhering aggregate height is not negligible with respect to the channel height and when the adherence is such that flow rates above 20 ml/min are required (Detry et al 2007;2009a). Owing to these limitations, this conversion was not made here, but it may be kept in mind that a higher adherence was revealed by a lower critical radius at a given flow rate, and by a larger flow rate for a given critical radius.…”

Section: Surface Cleanabilitymentioning

confidence: 99%

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Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Toure

Genet

Dupont‐Gillain

et al. 2014

Journal of Colloid and Interface Science

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AbbreviationsBSA: bovine serum albumin RFC: radial flow cell XPS: X-ray photoelectron spectroscopy 2 ABSTRACTThe influence of substrate hydrophobicity and biomacromolecules (dextran, bovine serum albumin -BSA) adsorption on the cleanability of surfaces soiled by spraying aqueous suspensions of quartz particles (10 to 30 µm size), then dried, was investigated using glass and polystyrene as substrates. The cleanability was evaluated using radial flow cell (RFC).The surface composition was determined by X-ray photoelectron spectroscopy (XPS). The interpretation of XPS data allowed the complexity due to the ubiquitous presence of organic contaminants to be coped with, and the surface composition to be expressed in terms of both the amount of adlayer and the mass concentration of adlayer constituents.When soiled with a suspension of particles in water, glass was much less cleanable than polystyrene, which was attributed to its much lower water contact angle, in agreement with previous observations on starch soil. Dextran was easily desorbed and did not affect the cleanability. The presence of BSA at the interface strongly improved the cleanability of glass while the contact angle did not change appreciably. In contrast, soiling polystyrene with quartz particles suspended in a BSA solution instead of water did not change markedly the cleanability, while the contact angle was much lower and the aggregates of soiling particles were more flat. These observations are explained by the major role of capillary forces developed upon drying, which influence the closeness of the contact between the soiling particles and the substrate and, thereby, the adherence of particles. The capillary forces are proportional to the liquid surface tension and depend in a more complex way on contact angles of the particles and of the substrate. The dependence of cleanability on capillary forces, and in particular on the liquid surface tension, is predominant as compared with its dependence on the size and shape of the soiling aggregates, which influence the efficiency of shear forces exerted by the flowing water upon cleaning.

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Section: Soiling Proceduressupporting

confidence: 72%

Section: Cleaning Experimentsmentioning

confidence: 99%

Section: Surface Cleanabilitymentioning

confidence: 99%

See 1 more Smart Citation

Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Toure

Genet

Dupont‐Gillain

et al. 2014

Journal of Colloid and Interface Science

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“…To evaluate the results of these experiments it is crucial to have quantitative knowledge of the wall shear stress available over the entire test surface in the flow cell used. Recently, Detry et al (2007) used the RFC to assess the cleanability of model surfaces: their soil was only removed at high flow rates where reliable analytical solutions do not exist, stressing the need of CFD solutions to predict the critical wall shear stress at which soil removal occurs.…”

Section: Introductionmentioning

confidence: 99%

“…A thorough description of the analytical and empirical models available for predicting wall shear stress ( ) in the RFC is given by Detry et al (2007). For creeping flow an analytical model is available (Moller, 1963) for the part of the RFC located outside the radial position where viscous forces start to dominate the inertia forces:…”

Section: Introductionmentioning

confidence: 99%

Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study

Detry

Deroanne

Sindic

et al. 2009

Chemical Engineering Science

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A combined computational fluid dynamics (CFD) and experimental approach to quantify the adhesion force of bacterial cells attached to a plane surface

et al. 2012

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A three-dimensional model is developed to study the laminar shear flow past a bacterial cell attached to a plane surface. The induced hydrodynamic forces and torque exerted on the cell are computed to clarify the prevailing mechanisms involved in the detachment of model bacteria. Results are discussed in terms of drag and torque magnitude as a function of the angles defining the orientation of the cell. It is shown that reorientation and rolling of spheroid-shaped cells are favored. It is also confirmed that rod-shaped cells would tend to lie on the surface and become aligned with the flow. The model is used to quantify the adhesion force of spheroid Bacillus cereus spores to stainless steel, deduced from previously described experiments in a shear stress flow chamber. The magnitude of the predicted adhesion force is close to that obtained using atomic force microscopy under similar experimental conditions. (C) 2012 American Institute of Chemical Engineers AIChE J, 201

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Cleanability assessment of model solid surfaces with a radial-flow cell

Cited by 17 publications

References 24 publications

Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Conditioning materials with biomacromolecules: Composition of the adlayer and influence on cleanability

Laminar flow in radial flow cell with small aspect ratios: Numerical and experimental study

A combined computational fluid dynamics (CFD) and experimental approach to quantify the adhesion force of bacterial cells attached to a plane surface

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