Particle adsorption on a polyether sulfone membrane: how electrostatic interactions dominate membrane fouling

Breite, Daniel; Went, Marco; Thomas, I. L.; Prager, Andrea; Schulze, Agnes

doi:10.1039/c6ra13787c

Cited by 36 publications

(31 citation statements)

References 62 publications

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“…However, the interaction between protein and membrane is quite complex, with contributions stemming from charge distribution, molecular flexibility, chirality and geometrical unfolding of the protein macromolecule 21‐24 . Moreover, the physiochemical condition of the feed can significantly affect protein‐membrane interactions, 17,20,25‐27 including electrostatic interactions, 17,28 hydrophobic interactions 25‐27 and hydration forces 19,29 . Breite et al found that, unlike the model polystyrene foulant, fouling induced by bovine serum albumin (BSA) and lysozyme on zwitterionic polyethersulfone (PES) membranes cannot be explained by either electrostatic or hydrophobic interactions 25 .…”

Section: Introductionmentioning

confidence: 99%

Membrane fouling by lysozyme: Effect of local interaction

Zydney

Chew

2021

AIChE Journal

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Molecular dynamics simulations were performed to understand the adsorption of positive‐charged lysozyme onto negative‐charged polyvinylidene fluoride membrane at three pH and two ionic strengths. The lysozyme was initialized at six orientations at 10 Å from the membrane and adsorption was deemed to occur when the lysozyme is less than 4 Å from the membrane. Local interactions are clearly important: (i) despite opposite net charges, no adsorption occurs in some cases throughout; (ii) lysozyme‐membrane separation distances differ among the initial orientations of lysozyme; and (iii) the correlation between lysozyme‐membrane interaction energy and adsorption probability is poor. Correspondingly, seven key local adsorption sites on lysozyme were identified. Of the two most common sites, one anchors due to electrostatics, while the other is not electrostatics‐based. Also, different sites are dominant in different feed conditions and have different interaction energies. These results reveal the importance of local interactions in membrane fouling by proteins in different feed conditions.

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Section: Introductionmentioning

confidence: 99%

Membrane fouling by lysozyme: Effect of local interaction

Zydney

Chew

2021

AIChE Journal

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“…4 For example, the size, 5 hydrophilicity, 6 and electrical properties 7 of the foulants have a critical impact on membrane fouling. In addition, the surface structure, 8 chemical properties, 9 hydrophilicity, 10,11 and charge 12,13 of the membranes also affect the fouling of the membranes. What's more, it is worth mentioning that ions in the solution play a crucial role in the membrane fouling process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of zwitterionic membrane fouling mechanism caused by HPAM in the presence of electrolytes

et al. 2021

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“…Previous studies also revealed that electrostatic interactions dominate the fouling tendencies of polymer membranes [7,8,9]. If membrane and foulants are oppositely charged electrostatic attraction will occur leading to adsorption of the foulant and consequently to heavy membrane fouling.…”

Section: Introductionmentioning

confidence: 99%

Charge Separating Microfiltration Membrane with pH-Dependent Selectivity

et al. 2018

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Membrane filters are designed for selective separation of components from a mixture. While separation by size might be the most common approach, other characteristics like charge can also be used for separation as presented in this study. Here, a polyether sulfone membrane was modified to create a zwitterionic surface. Depending on the pH value of the surrounding solution the membrane surface will be either negatively or positively charged. Thus, the charged state can be easily adjusted even by small changes of the pH value of the solution. Charged polystyrene beads were used as model reagent to investigate the pH dependent selectivity of the membrane. It was found that electrostatic forces are dominating the interactions between polystyrene beads and membrane surface during the filtration. This enables a complete control of the membrane’s selectivity according to the electrostatic interactions. Furthermore, differently charged beads marked with fluorescent dyes were used to investigate the selectivity of mixtures of charged components. These different components were successfully separated according to their charged state proving the selectivity of the invented membrane.

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Particle adsorption on a polyether sulfone membrane: how electrostatic interactions dominate membrane fouling

Abstract: This study presents a new method focussing on electrostatic interactions during fouling of microfiltration membranes.

Cited by 36 publications

References 62 publications

Membrane fouling by lysozyme: Effect of local interaction

Membrane fouling by lysozyme: Effect of local interaction

Analysis of zwitterionic membrane fouling mechanism caused by HPAM in the presence of electrolytes

Charge Separating Microfiltration Membrane with pH-Dependent Selectivity

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