PDMS/PVDF hybrid electrospun membrane with superhydrophobic property and drop impact dynamics for dyeing wastewater treatment using membrane distillation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)57-67
Journal / PublicationJournal of Membrane Science
Volume525
Online published22 Oct 2016
Publication statusPublished - 1 Mar 2017

Abstract

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=1285 nm). 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 L m−2 h−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.

Research Area(s)

  • Direct contact membrane distillation, Dyeing wastewater, Electrospun membrane, Fouling, Polydimethylsiloxane, Polyvinylidene fluoride

Citation Format(s)

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

In: Journal of Membrane Science, Vol. 525, 01.03.2017, p. 57-67.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal