Single-Walled Carbon Nanotube Film Supported Nanofiltration Membrane with a Nearly 10 nm Thick Polyamide Selective Layer for High-Flux and High-Rejection Desalination.
Fabricating nanofiltration (NF) membranes with high permeating flux and simultaneous high rejection rate for desalination is rather significant and highly desired. A new avenue is reported in this work to design NF membrane by using polydopamine wrapped single-walled carbon nanotube (PD/SWCNTs) ultrathin film as support layer instead of the use of traditional polymer-based underlying layers. Thanks to the high porosity, smooth surface, and more importantly optimal hydrophilic surface of PD/SWCNTs film, a defect-free polyamide selective layer for NF membrane with thickness of as thin as 12 nm is achieved. The obtained NF membrane exhibits an extremely high performance with a permeating flux of 32 L m-2h-1bar-1and a rejection rate of 95.9% to divalent ions. This value is two to five times higher than the traditional NF membranes with similar rejection rate.
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Yuzhang
Y
Zhu
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Wei
W
Xie
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Shoujian
S
Gao
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Feng
F
Zhang
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Wenbin
W
Zhang
Qatar Environment and Energy Research Institute, HBKU, Qatar Foundation, PO Box 5825, Doha, Qatar.
Zhaoyang
Z
Liu
i-Lab and CAS Center for Excellence in Nanoscience, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China. jjin2009@sinano.ac.cn.
Jian
J
Jin
D005374:Filtration / Q000379:methods*; D007211:Indoles / Q000737:chemistry*; D008567:Membranes, Artificial; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D054712:Salinity; D013499:Surface Properties
D007211:Indoles; D008567:Membranes, Artificial; D037742:Nanotubes, Carbon; D011108:Polymers; C568283:polydopamine
desalination; high flux; interfacial polymerization; nanofiltration; ultrathin membrane