Single-Walled Carbon Nanotube Film Supported Nanofiltration Membrane with a Nearly 10 nm Thick Polyamide Selective Layer for High-Flux and High-Rejection Desalination

Yuzhang Zhu, Wei Xie, Shoujian Gao, Feng Zhang, Wenbin Zhang, Zhaoyang Liu, Jian Jin

Research output: Contribution to journalArticle

76 Citations (Scopus)

Abstract

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-2 h-1 bar-1 and 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.

Original languageEnglish
JournalSmall
DOIs
Publication statusAccepted/In press - 2016

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Keywords

  • Desalination
  • High flux
  • Interfacial polymerization
  • Nanofiltration
  • Ultrathin membrane

ASJC Scopus subject areas

  • Biomaterials
  • Engineering (miscellaneous)
  • Biotechnology

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