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Article: Fast polydopamine coating on reverse osmosis membrane: Process investigation and membrane performance study
Title | Fast polydopamine coating on reverse osmosis membrane: Process investigation and membrane performance study |
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Authors | |
Keywords | Polydopamine Reverse osmosis Coating |
Issue Date | 2019 |
Publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/jcis |
Citation | Journal of Colloid and Interface Science, 2019, v. 535, p. 239-244 How to Cite? |
Abstract | We report a novel membrane surface modification method using a fast polydopamine coating (fPDAc) strategy. Specifically, NaIO4 was introduced in the coating process to accelerate the polydopamine deposition rate. Surface properties and separation performances of fPDAc-coated reverse osmosis membranes were characterized and compared to those obtained using the conventional slow polydopamine coating (sPDAc) strategy. Quartz crystal microbalance measurements showed greatly increased polydopamine deposition rate using the fPDAc method, resulting in a reduction of 97% coating time to reach an areal mass of 2000 ng/cm2. Both fPDAc and sPDAc enhanced the surface hydrophilicity and reduced the membrane surface charge. At relatively low areal mass deposition (<1000 ng/cm2), fPDAc-coated membranes showed improved NaCl rejection together with only mild loss of pure water flux. Nevertheless, this rejection enhancement effect was not noticeable when extensive polydopamine coating was applied due to the undesirable cake-enhanced concentration polarization effect. The extensive polydopamine coating was further accompanied with severe loss of membrane permeability, suggesting that shorter coating time (e.g., 4 min) is preferred using the fPDAc method. Our study provides a more rapid and effective membrane surface coating method compared to the conventional sPDAc method. |
Persistent Identifier | http://hdl.handle.net/10722/272860 |
ISSN | 2023 Impact Factor: 9.4 2023 SCImago Journal Rankings: 1.760 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Wang, J | - |
dc.contributor.author | Guo, H | - |
dc.contributor.author | Shi, X | - |
dc.contributor.author | Yao, Z | - |
dc.contributor.author | Qing, W | - |
dc.contributor.author | Liu, F | - |
dc.contributor.author | Tang, CY | - |
dc.date.accessioned | 2019-08-06T09:17:55Z | - |
dc.date.available | 2019-08-06T09:17:55Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Journal of Colloid and Interface Science, 2019, v. 535, p. 239-244 | - |
dc.identifier.issn | 0021-9797 | - |
dc.identifier.uri | http://hdl.handle.net/10722/272860 | - |
dc.description.abstract | We report a novel membrane surface modification method using a fast polydopamine coating (fPDAc) strategy. Specifically, NaIO4 was introduced in the coating process to accelerate the polydopamine deposition rate. Surface properties and separation performances of fPDAc-coated reverse osmosis membranes were characterized and compared to those obtained using the conventional slow polydopamine coating (sPDAc) strategy. Quartz crystal microbalance measurements showed greatly increased polydopamine deposition rate using the fPDAc method, resulting in a reduction of 97% coating time to reach an areal mass of 2000 ng/cm2. Both fPDAc and sPDAc enhanced the surface hydrophilicity and reduced the membrane surface charge. At relatively low areal mass deposition (<1000 ng/cm2), fPDAc-coated membranes showed improved NaCl rejection together with only mild loss of pure water flux. Nevertheless, this rejection enhancement effect was not noticeable when extensive polydopamine coating was applied due to the undesirable cake-enhanced concentration polarization effect. The extensive polydopamine coating was further accompanied with severe loss of membrane permeability, suggesting that shorter coating time (e.g., 4 min) is preferred using the fPDAc method. Our study provides a more rapid and effective membrane surface coating method compared to the conventional sPDAc method. | - |
dc.language | eng | - |
dc.publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/jcis | - |
dc.relation.ispartof | Journal of Colloid and Interface Science | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | Polydopamine | - |
dc.subject | Reverse osmosis | - |
dc.subject | Coating | - |
dc.title | Fast polydopamine coating on reverse osmosis membrane: Process investigation and membrane performance study | - |
dc.type | Article | - |
dc.identifier.email | Guo, H: guohao7@hku.hk | - |
dc.identifier.email | Tang, CY: tangc@hku.hk | - |
dc.identifier.authority | Guo, H=rp02772 | - |
dc.identifier.authority | Tang, CY=rp01765 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1016/j.jcis.2018.10.016 | - |
dc.identifier.pmid | 30312949 | - |
dc.identifier.scopus | eid_2-s2.0-85054464466 | - |
dc.identifier.hkuros | 299803 | - |
dc.identifier.volume | 535 | - |
dc.identifier.spage | 239 | - |
dc.identifier.epage | 244 | - |
dc.identifier.isi | WOS:000452811600026 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0021-9797 | - |