Modified stainless steel surfaces targeted to reduce fouling––surface characterization

Santos, Olga; Nylander, Tommy; Rosmaninho, R.; Rizzo, Gerhard; Yiantsios, S.G.; Andritsos, N.; Karabelas, A.J.; Müller‐Steinhagen, Hans; Melo, L. F.; Boulangé-Petermann, L.; Gabet, Christelle; Braem, Alan; Trägårdh, Christian; Paulsson, Marie

doi:10.1016/j.jfoodeng.2003.09.013

Cited by 115 publications

(109 citation statements)

References 15 publications

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“…A number of methods have been used to investigate the interactions between fouling materials and surfaces, in different industry sectors. Previous work on different fouling deposits and surfaces have used atomic force microscopy (AFM) to study surfaces, such as Parbhu et al ,(2006) Santos et al (2004, Verran and Whitehead (2006) and Whitehead et al (2006). AFM is able both to measure surface topography and energetics over a nanometre to micron scale (such as in marine biofilms by Phang et al, 2006Phang et al, , 2010 However there is very little work done in which AFM has been used to study food fouling problems.…”

Section: Introductionmentioning

confidence: 99%

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Akhtar

Bowen

Asteriadou

et al. 2010

Food and Bioproducts Processing

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Many researchers have studied the effects of changing the surface on fouling and cleaning. In biofouling the 'Baier curve' is a well-known result which relates adhesion to surface energy, and papers on the effect of changing surface energy to food fouling can be found more than 40 years ago. Recently the use of modified surfaces, at least at a research level, has been widespread. Here two different ways of studying surface-deposit interactions have been compared. Atomic force microscopy (AFM) is a method for probing interactions at a molecular level, and can measure (for example) the interaction between substrate and surfaces at a nm-scale. At a μm-mm level, we have developed a micromanipulation tool that can measure the force required to remove the deposit; the measure incorporates both surface and bulk deformation effects. The two methods have been compared by studying a range of model soils: toothpaste, as an example of a soil that can be removed by fluid flow alone, and confectionery soils. Removal has been studied from glass, stainless steel and fluorinated surfaces as examples of the sort of surfaces that can be found in practice. AFM measurements were made by using functionalized tips in force mode. The two types of probe give similar results, although the rheology of the soil affects the measurement from the micromanipulation probe under some circumstances. The data suggests that either method could be used to test candidate surfaces. 2 INTRODUCTIONThe cleaning of process plant is a difficult multiscale problem; metre-scale plant becomes clean as a result of fluid and chemical action on surfaces of individual plant items, acting at the meso-and nano scale. A sketch of the different length scales involved in cleaning process plant is given as Figure 1. To remove deposit from surfaces is difficult both to understand scientifically and to do industrially (Wilson, 2005; Fryer et al., 2006)

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Section: Introductionmentioning

confidence: 99%

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Akhtar

Bowen

Asteriadou

et al. 2010

Food and Bioproducts Processing

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“…The application of a Ni-P-PTFE coating is achieved through an autocatolytic plating process [76]. This involves the incorporation of PTFE nanoparticles into the Ni-P matrix acquiring advantages of properties of both materials [32].…”

Section: Ni-p-ptfementioning

confidence: 99%

“…As the ions only penetrate the uppermost layers of the surface, the surface properties can be modified whilst the bulk properties remain the same [107]. As a surface alloy is created, there are no issues regarding adhesion such as in chemical vapour deposition (CVD) [76]. The local environment of a particle on the surface of a solid differs from that of particles within the solid [108].…”

Section: Ion Implantationmentioning

confidence: 99%

“…This work identified that although the Ag ions had an antimicrobial effect; bacteria could still bind to a conditioning film of protein or were protected by EPS, reducing the effect of the surface modification. The key drawback in regards to the use of ion implantation is the high capital and operating costs associated with the technique [76].…”

Section: Ion Implantationmentioning

confidence: 99%

“…Sputtering coating is a physical vapour deposition (PVD) process occurring at subatmospheric pressures [76]. The high voltage that is applied between the surface and the coating material ionises the gas in the chamber until a plasma is ignited [76].…”

Section: Sputteringmentioning

confidence: 99%

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Abstract.There are three different factors that can affect adhesion: the process fluid, the processing conditions and the surface of the processing equipment. Of these three factors, the surface properties of the processing equipment are the factor that offers the greatest opportunity for manipulation. The two key surface properties that have been identified to reduce adhesion are the surface energy and the surface topography. The surface energy of a material determines its degree of wettability and, a surface's affinity for water. In previous studies the surface energy of materials have been leveraged in order to create a surface with reduced levels of fouling through surface modification or the addition of polymer coatings with varying degrees of hydrophobicity. In addition, the topography of surfaces has been modified to reduce the level of particle adhesion. These modifications involve creating either a structured or random porous microstructure on the surface. Additional methods identified to reduce fouling include the application of liquid infused porous surfaces at low shear conditions and the use of non-contact heating through techniques such as microwave processing.

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Modified stainless steel surfaces targeted to reduce fouling––surface characterization

Cited by 115 publications

References 15 publications

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Design of intelligent surfaces for energy intensive processing industry

Adhesion of Substances to Food Packages and Cookware

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