期刊
JOURNAL OF MEMBRANE SCIENCE
卷 520, 期 -, 页码 99-110出版社
ELSEVIER
DOI: 10.1016/j.memsci.2016.07.049
关键词
Graphene; Air gap membrane distillation; Superhydrophobic; Electrospun nanofiber; Desalination
资金
- Industrial Facilities AMP
- Infrastructure Research Program - Ministry of Land, Infrastructure and Transport of Korean Government [16IFIP-B065893-04]
- ARC Future Fellowship [FT140101208]
This study demonstrates the preparation and desalination performance via air gap membrane distillation (AGMD) of a graphene-loaded electrospun nanofiber membrane. Different concentrations of graphene (0-10 wt%) were incorporated in/on electrospun polyvinylidene fluoride-co-hexafluoropropylene (PH) membrane to obtain a robust, and superhydrophobic nanocomposite membrane. The results showed that graphene incorporation has significantly enhanced the membrane structure and properties with an optimal concentration of 5 wt% (i.e., G5PH). Characterization of G5PH revealed membrane porosity of > 88%, contact angle of > 162 (superhydrophobic), and high liquid entry pressure (LEP) of > 186 kPa. These favourable properties led to a high and stable AGMD flux of 22.9 L/m(2) h or LMH (compared with similar to 4.8 LMH for the commercial PVDF flat-sheet membrane) and excellent salt rejection (100%) for 60 h of operation using 3.5 wt% NaCl solution as feed (feed and coolant inlet temperatures of 60 and 20 degrees C, respectively). A two-dimensional dynamic model to investigate the flux profile of the graphene/PH membrane is also introduced. The present study suggests that exploiting the interesting properties of nanofibers and graphene nanofillers through a facile electrospinning technique provides high potential towards the fabrication of a robust and high-performance AGMD membrane. Published by Elsevier B.V.
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