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Polyelectrolyte Functionalisation of Track Etched Membranes: Towards Charge-Tuneable Adsorber Materials
| Content Provider | MDPI |
|---|---|
| Author | Lisa, Wiedenhöft Elleithy, Mohamed Ulbricht, Mathias Schacher, Felix |
| Copyright Year | 2021 |
| Description | Porous adsorber membranes are promising materials for the removal of charged pollutants, such as heavy metal ions or organic dyes as model substances for pharmaceuticals from water. Here, we present the surface grafting of polyethylene terephthalate (PET) track-etched membranes having well defined cylindrical pores of 0.2 or 1 µm diameter with two polyelectrolytes, poly(2-acrylamido glycolic acid) (PAGA) and poly(N-acetyl dehydroalanine) (PNADha). The polyelectrolyte functionalised membranes were characterised by changes in wettability and hydraulic permeability in response to the external stimuli pH and the presence of $Cu^{2+}$ ions. The response of the membranes proved to be consistent with functionalisation inside the pores, and the change of grafted polyelectrolyte macro-conformation was due to the reversible protonation or binding of $Cu^{2+}$ ions. Moreover, the adsorption of the model dye methylene blue was studied and quantified. PAGA-grafted membranes showed an adsorption behavior following the Langmuir model for methylene blue. |
| Starting Page | 509 |
| e-ISSN | 20770375 |
| DOI | 10.3390/membranes11070509 |
| Journal | Membranes |
| Issue Number | 7 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-06 |
| Access Restriction | Open |
| Subject Keyword | Membranes Water Science and Technology Polyampholytes Track-etched Membranes Surface Modification |
| Content Type | Text |
| Resource Type | Article |
