Fabrication of Forward Osmosis Membranes with CNTs/PAN Fibers Supporting Layer

Wanxiao LONG  Liangjie WANG  Yuping LI  Chunlei SU

doi:10.12034/j.issn.1009-606X.217193

The Chinese Journal of Process Engineering >

2017 , Vol. 17 >Issue 6: 1188 - 1194

DOI: https://doi.org/10.12034/j.issn.1009-606X.217193

Reaction & Separation

Fabrication of Forward Osmosis Membranes with CNTs/PAN Fibers Supporting Layer

Wanxiao LONG Liangjie WANG Yuping LI Chunlei SU

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1. School of Chemical Engineering, Xiangtan University, Xiangtan, Hunan 411105, China; 2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; 3. Beijing Engineering Research Centre of Process Pollution Control, Beijing 100190, China

Received date: 2017-03-27

Revised date: 2017-04-05

Online published: 2017-12-05

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Abstract

A thin film forward osmosis (FO) composite membrane with a polyacrylonitrile/multi-walled carbon nanotubes (PAN/f-MWCNTs) substrate via electrospinning was fabricated, the effects of PAN concentration and f-MWCNTs on membrane morphology, hydrophilicity and FO performance were investigated. The results showed that increase of PAN concentration promoted the diameter of nanofiber and decreased water flux and reverse salt flux. The addition of f-MWCNTs improved both the hydrophilicity and mechanical strength. The contact angle of FO memebrane with PAN/f-MWCNTs substrate was 41.39°, much smaller than that of FO memebrane with pure PAN fiber substrate (61.86°), and its mechanical strengths was 10.55 MPa while that of pure PAN fiber substrate was 3.60 MPa. The prepared membrane exhibited a high water flux of 79.1 L/(m2?h) with 1.0 mol/L NaCl as the draw solution and deionized water as feed solution, which surpassed that of two commercial FO membranes [CTA-NW 8.8 L/(m2?h) and CTA-ES 18.4 L/(m2?h)] and reported thin-film composite FO membrane, and also had a low reverse salt flux of 50.4 g/(m2?h).

Key words： forward osmosis; polyacrylonitrile; multi-walled carbon nanotubes; electrospinning fiber

Cite this article

Wanxiao LONG Liangjie WANG Yuping LI Chunlei SU . Fabrication of Forward Osmosis Membranes with CNTs/PAN Fibers Supporting Layer[J]. The Chinese Journal of Process Engineering, 2017 , 17(6) : 1188 -1194 . DOI: 10.12034/j.issn.1009-606X.217193

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