Swelling and Its Suppression in the Cleaning of Polymer Fouling Layers

Saikhwan, Phanida; Chew, Y.M. John; Paterson, and William R.; Wilson, D.I.

doi:10.1021/ie0615943

Cited by 15 publications

(12 citation statements)

References 19 publications

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“…The computer memory limited the number of mesh elements to approximately 3×10 6 . The highest pressure and velocity gradients occur under the nozzle rim and along the lip, and the mesh element density was greatest in these regions.…”

Section: Boundary Conditions and Meshingmentioning

confidence: 99%

Zero-Discharge Fluid-Dynamic Gauging for Studying the Swelling of Soft Solid Layers

Wang

Wilson

2015

Ind. Eng. Chem. Res.

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A bench-top device fluid dynamic gauging device to study the swelling or shrinking of soft solid layers immersed in a liquid environment in situ and in real time is demonstrated. A particular feature is that the volume of liquid is isolated, hence the name Zero net discharge Fluid Dynamic Gauging (ZFDG), which renders ZFDG suitable for aseptic operation. For the 1.78 mm nozzle diameter used here, calibration tests gave a resolution of ± 5 µm and uncertainty of ± 10 µm. Computational fluid dynamics simulations indicated that the shear stress imposed on a layer being gauged differed between the successive suction and ejection stages in ZFDG. The swelling of polyvinyl acetate (PVA) layers (about 1 mm dry thickness) and gelatin films (50-80 µm dry thickness) in aqueous solutions is reported as demonstration of a ZFDG application. There was good agreement with more cumbersome gravimetric methods. Gelatin swelled noticeably faster at high pH, above the pKa values of proline and hydroxyproline. Fitting the gelatin swelling data to a power law model indicated 'sub-Fickian' behaviour with a 'diffusion index' which increased with pH.

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Section: Boundary Conditions and Meshingmentioning

confidence: 99%

Zero-Discharge Fluid-Dynamic Gauging for Studying the Swelling of Soft Solid Layers

Wang

Wilson

2015

Ind. Eng. Chem. Res.

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“…In sharp contrast, organic fouling, specially fouling happening in organic media, has been studied to a significantly smaller degree, even though the industrial and environmental effects thereof are very large. A typical kind of organic fouling is polymer fouling, which usually happens during polymerization and polymer processing—two very important processes in chemical industry . Furthermore, organic polymers are commonly used as coagulants or flocculants in pretreatment for microfiltration.…”

Section: Introductionmentioning

confidence: 99%

Highly Polymer‐Repellent yet Atomically Flat Surfaces Based on Organic Monolayers with a Single Fluorine Atom

Wang

Pujari

Lagen

et al. 2015

Adv Materials Inter

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Organic monolayers or polymer brushes, often in combination with surface structuring, are widely used to prevent nonspecific adsorption of polymeric or biological material on sensor and microfluidic surfaces. Here it is demonstrated for the first time how robust, covalently attached alkyne‐derived monolayers with a varying numbers of fluorine atoms, on atomically flat Si(111), effectively repel a wide range of apolar polymers without the need for micro‐ or nanostructuring of the surface. The antifouling property of fluoro‐hydro monolayers is studied for a range of commonly used polymers with comparable molecular weight in nonaqueous solvent. Also, the effect of polymer molecular weight on the fouling behavior is investigated. A surface morphology survey by atomic force microscopy characterization that can accurately quantify the degree of fouling is developed. It is observed that especially the monofluorinated (F1) alkyne‐derived monolayer shows excellent antifouling behavior, under certain conditions even more so than corresponding monolayers with perfluorinated alkyl tails. The explanation of this surprising behavior is based on a competition of solvent–solute–surface interactions. These findings and analysis offer significant potential for antifouling applications of ultrathin and covalently bound fluorine‐containing coatings for a range of micro‐ and nanotechnological applications.

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“…Unlike protein fouling, organic polymer fouling has been infrequently studied. Polymer fouling can lead to: contamination during polymerization reaction processes [239], down time during reactor cleaning cycles [239], ineffective filtration [240] and inefficient heat exchangers [241]. In biological settings, algae and diatoms secrete extracellular polymeric substance (EPS) when adhering to a given surface [205,242].…”

Section: Polymer Foulingmentioning

confidence: 99%

Design of surfaces for controlling hard and soft fouling

Halvey

Macdonald

Dhyani

et al. 2018

Phil. Trans. R. Soc. A.

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In this review, we present a framework to guide the design of surfaces which are resistant to solid fouling, based on the modulus and length scale of the fouling material. Solid fouling is defined as the undesired attachment of solid contaminants including ice, clathrates, waxes, inorganic scale, polymers, proteins, dust and biological materials. We first provide an overview of the surface design approaches typically applied across the scope of solid fouling and explain how these disparate research efforts can be united to an extent under a single framework. We discuss how the elastic modulus and the operating length scale of a foulant determine its ability or inability to elastically deform surfaces. When surface deformation occurs, minimization of the substrate elastic modulus is critical for the facile de-bonding of a solid contaminant. Foulants with low modulus or small deposition sizes cannot deform an elastic bulk material and instead de-bond more readily from surfaces with chemistries that minimize their interfacial free energy or induce a particular repellant interaction with the foulant. Overall, we review reported surface design strategies for the reduction in solid fouling, and provide perspective regarding how our framework, together with the modulus and length scale of a foulant, can guide future antifouling surface designs. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology’.

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Swelling and Its Suppression in the Cleaning of Polymer Fouling Layers

Cited by 15 publications

References 19 publications

Zero-Discharge Fluid-Dynamic Gauging for Studying the Swelling of Soft Solid Layers

Zero-Discharge Fluid-Dynamic Gauging for Studying the Swelling of Soft Solid Layers

Highly Polymer‐Repellent yet Atomically Flat Surfaces Based on Organic Monolayers with a Single Fluorine Atom

Design of surfaces for controlling hard and soft fouling

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