In this work, we report a facile and robust surface membrane modification method via a
simple coating of PVDF membrane using tannic acid (TA) followed by oxidation with
sodium periodate (NaIO4). The modified membranes were investigated by SEM, AFM,
XPS, FTIR, and a water contact angle measurement. The Contact angle measurement
shows that the TA modified membrane exhibits superhydrophilicity and underwater
oleophobicity.
Results from FTIR and XPS indicate that the carboxylic groups were formed
on the surface of the TA modified membrane due to the oxidation of quinone by NaIO4,
which is the key to superhydrophilicity of the TA modified membrane surface. In addition,
the modified membrane was tested for oil-in-water emulsion separation.
A high TOC rejection of 99% was achieved for different kinds of surfactant-stabilized oil-in-water
emulsions as well as the surfactant-free oil/water mixture. The modified membrane not
only showed a good water flux and oil/water separation performance but also exhibited
excellent recyclability and chemical stability. Also, the developed method is versatile and
can be applied to the different types of substrate material. This robust, simple, and green
approach gives great potential to fabricate large-scale material surfaces for the industrial
oily wastewater treatment.
| Identifer | oai:union.ndltd.org:kaust.edu.sa/oai:repository.kaust.edu.sa:10754/630120 |
| Date | 11 1900 |
| Creators | Alduraiei, Fadhilah H. |
| Contributors | Wang, Peng, Physical Science and Engineering (PSE) Division, Han, Yu, Thoroddsen, Sigurdur T, Alsharani, Farhan |
| Source Sets | King Abdullah University of Science and Technology |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | 2019-12-03, At the time of archiving, the student author of this thesis opted to temporarily restrict access to it. The full text of this thesis became available to the public after the expiration of the embargo on 2019-12-03. |
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