Anti-fouling membranes by manipulating surface wettability and their anti-fouling mechanism

Lu, Xuemei, Peng, Yuelian, Qiu, Haoran, Liu, Xinrui and Ge, Lei (2017) Anti-fouling membranes by manipulating surface wettability and their anti-fouling mechanism. Desalination, 413 127-135. doi:10.1016/j.desal.2017.02.022

Author Lu, Xuemei
Peng, Yuelian
Qiu, Haoran
Liu, Xinrui
Ge, Lei
Title Anti-fouling membranes by manipulating surface wettability and their anti-fouling mechanism
Journal name Desalination   Check publisher's open access policy
ISSN 0011-9164
Publication date 2017-07-01
Sub-type Article (original research)
DOI 10.1016/j.desal.2017.02.022
Open Access Status Not yet assessed
Volume 413
Start page 127
End page 135
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Collection year 2018
Language eng
Formatted abstract
This study aims to compare the anti-wetting and anti-fouling surface behavior in membrane distillation (MD) by two surface modification routes on porous polyvinylidene fluoride (PVDF) membranes. A superhydrophobic membrane (SiO2-PFTS/PVDF) was obtained by dynamically forming 1H,1H,2H,2H-perfluorooctyl trichlorosilane containing SiO2 nanoparticles on the membrane surface as in our previous study; whereas a superhydrophilic membrane (PVA/PVDF) was developed by attaching a thin layer of poly(vinylalcohol) hydrogel onto the membrane's surface. The effects of surface modification on their anti-wetting or anti-fouling properties were examined in MD using an aqueous NaCl solution with various organic foulants (e.g., kerosene, humic acid (HA), and sodium dodecyl benzene sulfonate (SDBS)). The results showed that the superhydrophobic SiO2-PFTS/PVDF membrane displayed excellent self-cleaning characteristics and wetting resistance against all three studied foulants. In contrast, the hydrophilic surface layer of the PVA/PVDF membrane only slowed down wetting and fouling when in contact with kerosene and HA. Nonetheless, when dealing with SDBS, its anti-wettability performance was comparable to that of the SiO2-PFTS/PVDF membrane. The superhydrophobic SiO2-PFTS/PVDF membrane exhibited anti-fouling and anti-wetting behaviors even though the extended Derjaguin–Landau–Verwey–Overbeek theory indicated the attraction force between the membrane surface and all three foulants.
Keyword Anti-fouling
Membrane distillation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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