Journal article 823 views 224 downloads
Superior cross-linking assisted layer by layer modification of forward osmosis membranes for brackish water desalination
Wafa Suwaileh,
Daniel Johnson 
,
Saeed Khodabakhshi,
Nidal Hilal
,
Saeed Khodabakhshi,
Nidal Hilal
Desalination, Volume: 463, Pages: 1 - 12
Swansea University Authors:
Daniel Johnson , Nidal Hilal
-
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DOI (Published version): 10.1016/j.desal.2019.04.009
Abstract
A novel surface modification strategy was developed to modify polyethersulfone membrane substrate to create membranes for forward osmosis applications. A novel poly(ethylenimine) crosslinked Hexadecafluorodecanedioic acid polyelectrolyte was synthesized, followed by layer by layer deposition on the...
| Published in: | Desalination |
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| ISSN: | 0011-9164 |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa49913 |
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| Abstract: |
A novel surface modification strategy was developed to modify polyethersulfone membrane substrate to create membranes for forward osmosis applications. A novel poly(ethylenimine) crosslinked Hexadecafluorodecanedioic acid polyelectrolyte was synthesized, followed by layer by layer deposition on the surface of an ultrafiltration membrane substrate. While the unmodified membrane was negatively charged, this procedure reversed the surface charge, leading to a positively charged forward osmosis-nanofiltration membrane. Interestingly, at pH 7, the zeta potential approached 6.9 mV for membrane coated 4.5 as compared to the pristine membrane with a zeta potential value of approximately -11.0 mV. Extensive characterization and chemical analyses were carried out to ensure the effectiveness of the developed separation layer. The results revealed that the poly(ethylenimine) crosslinked Hexadecafluorodecanedioic acid was successfully deposited on the polyethersulfone membrane substrate. Preparation conditions, such as curing temperature and time were optimized. It was found out that membrane coated with 3.5 bilayers and cured at 60oC for one hour exhibited optimal water permeability of 21.9 LMH of and solute permeability of 1.66 L m−2 h−1 as compared to the neat membrane. |
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| Keywords: |
Forward osmosis, brackish water desalination, polyether sulfone membrane, Layer by layer assembly, modelling. |
| College: |
Faculty of Science and Engineering |
| Start Page: |
1 |
| End Page: |
12 |