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Article

Preparation and Characterization of MWCNTs/PVDF Conductive Membrane with Cross-Linked Polymer PVA and Study on Its Anti-Fouling Performance

1
Marine College, Shandong University, Weihai 264209, China
2
State Key Laboratory of Urban Water Resources and Water Environment, School of Marine Science and Technology, Harbin Institute of Technology at Weihai, Weihai 264200, China
*
Author to whom correspondence should be addressed.
Academic Editors: Patrick Loulergue and Anthony Szymczyk
Membranes 2021, 11(9), 703; https://doi.org/10.3390/membranes11090703
Received: 13 August 2021 / Revised: 5 September 2021 / Accepted: 10 September 2021 / Published: 14 September 2021
(This article belongs to the Special Issue Advanced Membrane Processes in Water Treatment)
Based on carboxylated multi-walled carbon nanotubes (MWCNTs-COOH), a MWCNTs/PVDF conductive membrane was prepared by a vacuum filtration cross-linking method. The surface compositions and morphology of conductive membranes were studied by X-ray photoelectron spectroscopy and high-resolution field emission scanning electron microscopy, respectively. The effects of cross-linked polymeric polyvinyl alcohol (PVA) on the conductive membrane properties such as the porosity, pore size distribution, pure water flux, conductivity, hydrophilicity, stability and antifouling properties were investigated. Results showed that the addition of PVA to the MWCNTs/PVDF conductive membrane decreased the pure water flux, porosity and the conductivity. However, the hydrophilicity of the modified MWCNTs/PVDF conductive membrane was greatly improved, and the contact angle of pure water was reduced from 70.18° to 25.48° with the addition of PVA contents from 0 wt% to 0.05 wt%. Meanwhile, the conductive membranes with higher content had a relatively higher stability. It was found that the conductive functional layer of the conductive membrane had an average mass loss rate of 1.22% in the 30 min ultrasonic oscillation experiment. The tensile intensity and break elongation ratio of the conductive membrane are improved by the addition of PVA, and the durability of the conductive membrane with PVA was superior to that without PVA added. The electric assisted anti-fouling experiments of modified conductive membrane indicated that compared with the condition without electric field, the average flux attenuation of the conductive membrane was reduced by 11.2%, and the membrane flux recovery rate reached 97.05%. Moreover, the addition of PVA could accelerate the clean of the conductive membranes. View Full-Text
Keywords: conductive membrane; carbon nanotube; cross-linked; anti-fouling conductive membrane; carbon nanotube; cross-linked; anti-fouling
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MDPI and ACS Style

Ding, Y.; Guo, Z.; Dong, X.; You, H.; Mei, J.; Hou, X.; Liang, Z.; Li, Z. Preparation and Characterization of MWCNTs/PVDF Conductive Membrane with Cross-Linked Polymer PVA and Study on Its Anti-Fouling Performance. Membranes 2021, 11, 703. https://doi.org/10.3390/membranes11090703

AMA Style

Ding Y, Guo Z, Dong X, You H, Mei J, Hou X, Liang Z, Li Z. Preparation and Characterization of MWCNTs/PVDF Conductive Membrane with Cross-Linked Polymer PVA and Study on Its Anti-Fouling Performance. Membranes. 2021; 11(9):703. https://doi.org/10.3390/membranes11090703

Chicago/Turabian Style

Ding, Yi, Zhansheng Guo, Xinan Dong, Hong You, Junxue Mei, Xuguang Hou, Zhenlin Liang, and Zhipeng Li. 2021. "Preparation and Characterization of MWCNTs/PVDF Conductive Membrane with Cross-Linked Polymer PVA and Study on Its Anti-Fouling Performance" Membranes 11, no. 9: 703. https://doi.org/10.3390/membranes11090703

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