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A sacrificial-layer approach to fabricate polysulfone support for forward osmosis thin-film composite membranes with reduced internal concentration polarisation

Journal Article


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Abstract


  • This study demonstrates a sacrificial-layer approach by co-casting, which is the simultaneous casting of two layers, to prepare a polysulfone support (denoted as PSfco) layer with open bottom surface morphology for fabricating thin-film composite forward osmosis (FO) membranes. In the co-casting process, polyetherimide (PEI), used as the sacrificial layer, was co-cast beneath the PSf layer. After the PEI layer was peeled off, PSfco was yielded with an open-bottom structure. Results showed that under the same operating condition, the FO membrane prepared by co-casting (denoted as PSfco-TFC) demonstrated a 10% higher water flux using 0.5 M NaCl draw solution and 30% higher water flux using 4 M NaCl draw solution in the AL-FS mode in comparison to membranes prepared in a single layer casting technique (denoted as PSfs-TFC). The PSfco-TFC exhibits a lower average structural parameter (S, 167 μm) than that of the PSfs-TFC (241 μm), while the water and salt permeability coefficients of both membranes are similar. Results reported here demonstrate that the co-casting technique can be used to fabricate FO membranes with significantly improved performance compared to the conventional approach.

Authors


  •   Xiao, Peipei (external author)
  •   Nghiem, Long D.
  •   Yin, Yong (external author)
  •   Li, Xuemei (external author)
  •   Zhang, Mengxi (external author)
  •   Chen, Gang (external author)
  •   Song, Jianfeng (external author)
  •   He, Tao (external author)

Publication Date


  • 2015

Citation


  • Xiao, P., Nghiem, L., Yin, Y., Li, X., Zhang, M., Chen, G., Song, J. & He, T. (2015). A sacrificial-layer approach to fabricate polysulfone support for forward osmosis thin-film composite membranes with reduced internal concentration polarisation. Journal of Membrane Science, 481 106-114.

Scopus Eid


  • 2-s2.0-84923385284

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4577&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3558

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 106

End Page


  • 114

Volume


  • 481

Place Of Publication


  • Netherlands

Abstract


  • This study demonstrates a sacrificial-layer approach by co-casting, which is the simultaneous casting of two layers, to prepare a polysulfone support (denoted as PSfco) layer with open bottom surface morphology for fabricating thin-film composite forward osmosis (FO) membranes. In the co-casting process, polyetherimide (PEI), used as the sacrificial layer, was co-cast beneath the PSf layer. After the PEI layer was peeled off, PSfco was yielded with an open-bottom structure. Results showed that under the same operating condition, the FO membrane prepared by co-casting (denoted as PSfco-TFC) demonstrated a 10% higher water flux using 0.5 M NaCl draw solution and 30% higher water flux using 4 M NaCl draw solution in the AL-FS mode in comparison to membranes prepared in a single layer casting technique (denoted as PSfs-TFC). The PSfco-TFC exhibits a lower average structural parameter (S, 167 μm) than that of the PSfs-TFC (241 μm), while the water and salt permeability coefficients of both membranes are similar. Results reported here demonstrate that the co-casting technique can be used to fabricate FO membranes with significantly improved performance compared to the conventional approach.

Authors


  •   Xiao, Peipei (external author)
  •   Nghiem, Long D.
  •   Yin, Yong (external author)
  •   Li, Xuemei (external author)
  •   Zhang, Mengxi (external author)
  •   Chen, Gang (external author)
  •   Song, Jianfeng (external author)
  •   He, Tao (external author)

Publication Date


  • 2015

Citation


  • Xiao, P., Nghiem, L., Yin, Y., Li, X., Zhang, M., Chen, G., Song, J. & He, T. (2015). A sacrificial-layer approach to fabricate polysulfone support for forward osmosis thin-film composite membranes with reduced internal concentration polarisation. Journal of Membrane Science, 481 106-114.

Scopus Eid


  • 2-s2.0-84923385284

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=4577&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3558

Has Global Citation Frequency


Number Of Pages


  • 8

Start Page


  • 106

End Page


  • 114

Volume


  • 481

Place Of Publication


  • Netherlands