期刊
DESALINATION
卷 303, 期 -, 页码 23-28出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2012.07.006
关键词
Contact angle; Reverse osmosis (RO) membrane; Captive bubble method; Sessile drop method; Hydrophilicity
资金
- WCU (World Class lJniversity) program through a Korea Science and Engineering Foundation
- Ministry of Education, Science, and Technology [R31-10013]
- National Research Foundation of Korea
- Korean Government [NRF-2010-C1AAA01-0029061]
- Plant Technology Advancement Program [C106A1520001-06A085500121]
- Ministry of Construction, Transportation of the Korean Government
- National Research Foundation of Korea [R31-2012-000-10013-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Contact angle measurement is conducted to determine surface hydrophilicity of RO membrane with the intention of predicting membrane performance or fouling potential. Most researchers of membrane technology have used contact angles without considering effective factors for contact angle measurement such as measurement time, drop volume and membrane sample preparation. In fact, significantly different contact angles are reported even on the same RO membrane. In this study, contact angles were measured by the sessile drop method and captive bubble method and were compared with various conditions such as measurement time, drop volume, membrane sample preparation and liquid type in the commercialized RO membranes. As a result. sessile drop method showed unreliable contact angles, which varied dramatically with the preparation conditions. On the other hand, the captive bubble method, which represents conditions closer to the real RO membrane process, showed reproducible contact angles. For the different commercially available RO membranes, similar hydrophilicity was observed. Overall, the captive bubble method appears to be a more adequate method for measuring contact angle of RO membranes. (C) 2012 Elsevier B.V. All rights reserved.
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