Physico-chemical mechanisms governing the adherence of starch granules on materials with different hydrophobicities

Detry, Jean; Sindic, Marianne; Servais, Marjorie J.; Adriaensen, Yasmine; Derclaye, Sylvie; Deroanne, Claude; Rouxhet, Paul

doi:10.1016/j.jcis.2010.11.052

Cited by 17 publications

(15 citation statements)

References 30 publications

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“…It may be explained by the lower contact angle (Figure 3a), in agreement with a study (Detry et al, 2011) of the adherence of starch granules on different substrates, including glass and polystyrene, using the same experimental approach as here (soiling with droplets of a starch suspension and drying, cleaning with the radial flow cell used in this work). A higher substrate wettability increases droplet spreading which leads to thinner aggregates and decreases the efficiency of shear forces exerted by the flowing water.…”

Section: Cleanabilitysupporting

confidence: 88%

“…In the study of the adherence of starch granules (Detry et al, 2011), SEM micrographs obtained with the in-lens detector showed that macromolecules or submicrometer size starch fragments were adsorbed from the liquid phase and, or carried by the liquid film retracting during drying, and were accumulated at the granule-substrate interface.…”

Section: Cleanabilitymentioning

confidence: 99%

“…Physico-chemical processes at interfaces created at different stages of fouling and cleaning may be important (Jensen et al, 2007 ;Detry et al, 2009a;Blel et al, 2010). Under this respect, typical examples are fouling with particles (Määttä et al, 2011;Detry et al, 2011;Pesonen-Leinonen et al, 2006a;2006b;Kuisma et al, 2007) and with a continuous layer of more or less complex composition (Mauermann et al, 2009;Piispanen et al, 2011), but these two situations differ according to the influence of the substrate surface properties on drying and cleaning. The interactions between the substrate and particulate contaminants need to be better understood in order to reduce equipment fouling, to improve the efficiency of cleaning and disinfection, or to develop easy-to-clean surfaces (Podczeck, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Proteins at the outer surface of bacteria are known to play an important role in the initial attachment to solid surfaces in water (Dufrêne et al, 1996;Flint et al, 1997;Caccavo, 1999;Boonaert and Rouxhet, 2000;Lower et al, 2005;Mercier-Bonin et al, 2009). In a work devoted to soiling by starch suspension, it was reported (Detry et al, 2011) that the presence of macromolecules, mainly polysaccharides, which were adsorbed from the liquid phase or carried by the retracting water film and deposited at the granulesubstrate interface, acted as an adhesive joint, the properties of which seemed to be influenced by the detailed history of drying and subsequent exposure to humidity. Macromolecules dissolved in the starch suspension may act in various ways: (i) modification of liquid surface tension and drop spreading upon soiling, (ii) adsorption at the solid-liquid interface, (iii) accumulation at substrate-particulate interface upon drying.…”

Section: Introductionmentioning

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: Cleanabilitysupporting

confidence: 88%

Section: Cleanabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…A study of starch granules adherence, after suspension spraying onto different substrates and drying, demonstrated that substrate wettability influenced the shape and compactness of the adhering aggregates, the efficiency of shear forces upon cleaning, and finally the adherence of soiling particles (Detry et al, 2011). Moreover, it was reported that the presence of macromolecules, mainly polysaccharides, which were adsorbed from the liquid phase or carried by the retracting water film and deposited at the granulesubstrate interface, acted as an adhesive joint, the properties of which seemed to be influenced by the detailed history of drying and subsequent exposure to humidity.…”

Section: Introductionmentioning

confidence: 99%