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Electrostatically coupled $SiO_{2}$ nanoparticles/poly (L-DOPA) antifouling coating on a nanofiltration membrane
| Content Provider | Scilit |
|---|---|
| Author | Alhumaidi, Moza Saif Arshad, Fathima Aubry, Cyril Ravaux, Florent McElhinney, James Hasan, Ayesha Zou, Linda |
| Copyright Year | 2020 |
| Description | Journal: Nanotechnology In this work, the fouling resistance of TFC (thin film composite) nanofiltration membrane has been enhanced by electrostatically coupled SiO2 (silica dioxide) nanoparticles/poly(L-DOPA) (3-(3,4-dihydroxyphenyl)-l-alanine) antifouling coating. SiO2 nanoparticles were synthesized in different size ranges and combined with L-DOPA; and then coated as an anti-fouling layer on the membrane surface by recirculated deposition. Membranes were coated with S-NP (silica nanoparticles) in small (19.8 nm), medium (31.6 nm) and large (110.1 nm) size. The zwitterionic compound L-DOPA in the form of self-polymerized poly(L-DOPA) (PDOPA) helped in the attachment of the S-NP on to the membrane surface. It was confirmed by AFM (atomic force microscopy) measurement that coating of membranes led to an increase in hydrophilicity and reduction in surface roughness, which in turn led to a 60% reduction in adhesion force of foulant on the membrane as compared to the neat membrane. The modified membranes experienced almost no flux decline during the filtration experimental period, whereas the unmodified (neat) membrane showed sharp flux decline. The best coating conditions of silica nanoparticles resulting in the enhanced anti-fouling properties were identified. Biofouling film formation on the membranes were evaluated quantitatively by flow cytometry method. The results indicated that the modified membranes had 50% lower microbial population growth in terms of Total Event Count compared to the neat membrane. Overall, the experimental results have confirmed that the coating of electrostatically coupled SiO2 nanoparticles and PDOPA (S-NP/PDOPA) on TFC-NF (nanofiltration) membrane surface is effective in improving the fouling resistance of the membranes. This result has positive implications on reducing membrane fouling in the desalination and industrial wastewater treatment applications. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6528/ab8085/pdf |
| ISSN | 09574484 |
| e-ISSN | 13616528 |
| DOI | 10.1088/1361-6528/ab8085 |
| Journal | Nanotechnology |
| Issue Number | 27 |
| Volume Number | 31 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2020-03-17 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nanotechnology Polymer Science Surface Roughness Electrostatically Coupled Sio2 Sio2 Nanoparticles Membrane Surface |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering |
