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Polymers
Volume 12
Issue 2
10.3390/polym12020260
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Article

Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization

by
Yuanyuan Tang
†,
Shan Li
†,
Jia Xu
* and
Congjie Gao
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, Shandong, China
*
Author to whom correspondence should be addressed.
†
The authors have equal contributions.
Polymers 2020, 12(2), 260; https://doi.org/10.3390/polym12020260
Submission received: 30 November 2019 / Revised: 3 January 2020 / Accepted: 8 January 2020 / Published: 23 January 2020
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Abstract

This study reported a series of thin film composite (TFC) membranes with single-walled nanotubes (SWCNTs) interlayers for the forward osmosis (FO) application. Pure SWCNTs with ultrahigh length-to-diameter ratio and without any functional group were applied to form an interconnect network interlayer via strong π-π interactions. Compared to the TFC membrane without SWCNTs interlayer, our TFC membrane with optimal SWCNTs interlayer exhibited more than three times the water permeability (A) of 3.3 L m−2h−1bar−1 in RO mode with 500 mg L−1 NaCl as feed solution and nearly three-fold higher FO water flux of 62.8 L m−2 h−1 in FO mode with the deionized water as feed solution and 1 M NaCl as draw solution. Meanwhile, the TFC membrane with SWCNTs interlayer exhibited significantly reduced membrane structure parameters (S) to immensely mitigate the effect of internal concentration polarization (ICP) in support layer with micro-sized pores in favor of higher water flux. It showed that the pure SWCNTs interlayer could be an effective strategy to apply in FO membranes.
Keywords: forward osmosis membrane; interlayer; single-walled nanotubes; interfacial polymerization forward osmosis membrane; interlayer; single-walled nanotubes; interfacial polymerization
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MDPI and ACS Style

Tang, Y.; Li, S.; Xu, J.; Gao, C. Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization. Polymers 2020, 12, 260. https://doi.org/10.3390/polym12020260

AMA Style

Tang Y, Li S, Xu J, Gao C. Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization. Polymers. 2020; 12(2):260. https://doi.org/10.3390/polym12020260

Chicago/Turabian Style

Tang, Yuanyuan, Shan Li, Jia Xu, and Congjie Gao. 2020. "Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization" Polymers 12, no. 2: 260. https://doi.org/10.3390/polym12020260

APA Style

Tang, Y., Li, S., Xu, J., & Gao, C. (2020). Thin Film Composite Forward Osmosis Membrane with Single-Walled Carbon Nanotubes Interlayer for Alleviating Internal Concentration Polarization. Polymers, 12(2), 260. https://doi.org/10.3390/polym12020260

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