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Citation
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HERO ID
7099619
Reference Type
Journal Article
Title
Development of a composite membrane with underwater-oleophobic fibrous surface for robust anti-oil-fouling membrane distillation
Author(s)
Wang, K; Hou, D; Qi, P; Li, K; Yuan, Z; Wang, J; ,
Year
2019
Is Peer Reviewed?
Yes
Journal
Journal of Colloid and Interface Science
ISSN:
0021-9797
EISSN:
1095-7103
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Location
SAN DIEGO
Page Numbers
375-383
Language
English
PMID
30465974
DOI
10.1016/j.jcis.2018.11.040
Web of Science Id
WOS:000456637900039
Abstract
Membrane fouling caused by non-polar foulants is a challenging problem for hydrophobic membranes, which hinders the industrial implementation of membrane distillation (MD). The hydrophilic coating can create a hydration layer at solid-water interface, thereby the hydrophilic surfaces are expected to supply a barrier inhibiting adhesion of hydrophobic foulants. Hence, it should be possible to develop anti-fouling composite membranes through constructing a hydrophilic skin layer onto hydrophobic MD membranes. Herein, we fabricated a novel composite membrane for excellent anti-oil-fouling performance in MD process by electrospinning polyetherimide (PEI) nanofibers on the hydrophobic polyvinylidene fluoride (PVDF) membrane surface, followed by cross-linking with ethanediamine (EDA). The membrane morphology and structure properties, surface zeta potential and wettability, thermal stability were all systematically characterized, and force spectroscopy was used to quasi-quantitatively evaluate oil-membrane adhesion force. Compared with the PVDF membrane, the PVDF/PEI-EDA composite membrane exhibited strong resistance to crude oil with underwater oil contact angle of about 145° and low oil-membrane adhesion force, which contributed to the stable performance during MD desalinating an oily and saline solution. The fabricated composite membrane with underwater-oleophobic fibrous surface can effectively mitigate oil-fouling in MD and promote MD to treat highly saline wastewater with high concentration of hydrophobic foulants.
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