Enhanced anti-fouling property in membrane distillation by pore channel surface modification
Article
Article Title | Enhanced anti-fouling property in membrane distillation by pore channel surface modification |
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ERA Journal ID | 1087 |
Article Category | Article |
Authors | Qiu, Haoran (Author), Peng, Yuelian (Author), Ge, Lei (Author), Villacorta Hernandez, Byron (Author) and Zhu, Zhonghua (Author) |
Journal Title | Applied Surface Science |
Journal Citation | 443, pp. 217-226 |
Number of Pages | 10 |
Year | 2018 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 0169-4332 |
1873-5584 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.apsusc.2018.03.004 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0169433218306573?via%3Dihub |
Abstract | Membrane surface modification by forming a functional layer is an effective way to improve the anti-fouling properties of membranes; however, the additional layer and the potential blockage of bulk pores may increase the mass transfer resistance and reduce the permeability. In this study, we applied a novel method of preparing anti-fouling membranes for membrane distillation by dispersing graphene oxide (GO) on the channel surface of polyvinylidene fluoride membranes. The surface morphology and properties were characterized by scanning electron microscopy, atomic force microscope, and Fourier transform infrared spectrometry. Compared to the membrane surface modification by nanoparticles (e.g. SiO2), GO was mainly located on the pore surface of the membrane bulk, rather than being formed as an individual layer onto the membrane surface. The performance was evaluated via a direct-contact membrane distillation process with anionic and cationic surfactants as the foulants, separately. Compared to the pristine PVDF membrane, the anti-fouling behavior and distillate flux of the GO-modified membranes were improved, especially when using the anionic surfactant as the foulant. The enhanced anti-fouling performance can be attributed to the oxygen containing functional groups in GO and the healing of the membrane pore defects. This method may provide an effective route to manipulate membrane pore surface properties for anti-fouling separation without increasing mass transfer resistance. |
Keywords | surface modification; membrane distillation; anti-fouling; pore defects; graphene oxide; mass transfer |
ANZSRC Field of Research 2020 | 340305. Physical properties of materials |
400409. Separation technologies | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Beijing University of Technology, China |
Centre for Future Materials | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4q05/enhanced-anti-fouling-property-in-membrane-distillation-by-pore-channel-surface-modification
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