Anti-fouling properties of poly(acrylic acid) grafted ultrafiltration membranes – experimental and theoretical study

Nina Borzęcka , Izabela Kozłowska , Jakub M. Gac , Marta Bojarska


Grafting of ultrafiltration membranes with polyelectrolyte chains is considered as an anti-fouling treatment. In this research, grafting of poly(acrylic acid) chains to the surface of polypropylene ultrafiltration membrane was obtained by a Fenton–type reaction. Due to the surface modification treatment, we observe a decrease of susceptibility to particulate fouling of the modified membranes. The improvement of membrane properties is observed as a decrease of silica deposited on the surface of membranes in a given time of ultrafiltration process. This effect is exceptionally visible at high pH of filtered suspension. The experimental results have been supported by the numerical modeling of dynamics of polyelectrolyte chain anchored to the membrane surface. This model (based on coarse grained molecular dynamics) allowed us to obtain the dependence of the repulsive force between the membrane and particle on their distance. Considering the value of this force, together with the classical DLVO interactions (van der Waals force, electric double layer force) we were able to predict the stability of suspension in the vicinity of the membrane surface and thus the susceptibility of membrane to fouling.
Author Nina Borzęcka (FCPE)
Nina Borzęcka,,
- Faculty of Chemical and Process Engineering
, Izabela Kozłowska (FCPE)
Izabela Kozłowska,,
- Faculty of Chemical and Process Engineering
, Jakub M. Gac (FCPE / CIPE)
Jakub M. Gac,,
- Chair of Integrated Process Engineering
, Marta Bojarska - GVS Filter Technology
Marta Bojarska,,
Journal seriesApplied Surface Science, ISSN 0169-4332, e-ISSN 1873-5584
Issue year2020
Publication size in sheets0.5
Article number144658
Keywords in Englishmembrane separation, grafted membranes, polymer brushes, numerical modeling, coarse-grained molecular dynamics
ASJC Classification2508 Surfaces, Coatings and Films
Languageen angielski
Borzęcka N. (i in.) - Anti-fouling properties...pdf 1.56 MB
Score (nominal)140
Score sourcejournalList
ScoreMinisterial score = 140.0, 10-06-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.326; WoS Impact Factor: 2018 = 5.155 (2) - 2018=4.281 (5)
Citation count*1 (2020-08-30)
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