PDMS/PVDF hybrid electrospun membrane with superhydrophobic property and drop impact dynamics for dyeing wastewater treatment using membrane distillation
Type
ArticleAuthors
An, Alicia KyoungjinGuo, Jiaxin
Lee, Eui-Jong
Jeong, Sanghyun
Zhao, Yanhua
Wang, Zuankai
Leiknes, TorOve

KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionEnvironmental Science and Engineering Program
Water Desalination and Reuse Research Center (WDRC)
Date
2016-10-22Online Publication Date
2016-10-22Print Publication Date
2017-03Permanent link to this record
http://hdl.handle.net/10754/621175
Metadata
Show full item recordAbstract
Fouling in membrane distillation (MD) results in an increase in operation costs and deterioration in a water quality. In this work, a poly(vinylidene fluoride-co-hexafluoropropene) (PVDF-HFP) electrospun (E-PH) membrane was fabricated by hybridizing polydimethylsiloxane (PDMS) polymeric microspheres with superhydrophobicity onto the E-PH membrane via electrospinning. The resulting hybrid PDMS with E-PH (E-PDMS) membrane showed a significant enhancement in surface hydrophobicity (contact angle, CA = 155.4°) and roughness (Ra = 1,285mm). The zeta potential of E-PDMS membrane surface showed a higher negative value than that of a commercial PVDF (C-PVDF) membrane. These properties of E-PDMS membrane provided an antifouling in treating of differently-charged dyes and generated a flake-like dye–dye (loosely bound foulant) structure on the membrane surface rather than in the membrane pores. This also led to a high productivity of E-PDMS membrane (34 Lm-2h-1, 50% higher than that of C-PVDF membrane) without fouling or wetting. In addition, complete color removal and pure water production were achieved during a long-term operation. An application of intermittent water flushing (WF) in direct contact MD (DCMD) operation led to a 99% CA recovery of E-PDMS membrane indicating its sustainability. Therefore, the E-PDMS membrane is a promising candidate for MD application in dyeing wastewater treatment.Citation
An AK, Guo J, Lee E-J, Jeong S, Zhao Y, et al. (2016) PDMS/PVDF hybrid electrospun membrane with superhydrophobic property and drop impact dynamics for dyeing wastewater treatment using membrane distillation. Journal of Membrane Science. Available: http://dx.doi.org/10.1016/j.memsci.2016.10.028.Sponsors
This work was supported by City University of Hong Kong under its Start-up Grant for new faculty (Project number: 7200447) and the Research Grants Council of Hong Kong for Early Career Scheme (Project number: 9048074).Publisher
Elsevier BVJournal
Journal of Membrane ScienceAdditional Links
http://www.sciencedirect.com/science/article/pii/S1540748916304722ae974a485f413a2113503eed53cd6c53
10.1016/j.memsci.2016.10.028
Scopus Count
Except where otherwise noted, this item's license is described as © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license