Interconnection of electrospun nanofibers via a post co-solvent treatment and its open pore size effect on pressure-retarded osmosis performance

Chul Ho Park, Harim Bae, Sung Jo Kwak, Moon Seok Jang, Jung-hyun Lee, Jonghwi Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Design of support layer structures for asymmetric thin film composite membranes has drawn keen attention to improve the power density for salinity gradient power based on pressure-retarded osmosis. This study has interests on electrospun nanofiber-based support layers, and the effects of its open pore sizes are attractively stated. To control the open pore size, a counter charge deposition method was introduced. To retain the open pore size, all the nanofibers were interconnected by a post co-solvent treatment technology. For a thin film composite membrane, an interfacial polymerization was used to fabricate a polyamide active layer on the electrospun nanofiber-based support layers. It was found that although the maximum power density achieved with an open pore size of 2.4 μm2 was 0.14 W/m2, it increased significantly up to 9.5 W/m2 when the pore size was reduced to 0.65 μm2. The cause is the salt flux which increases with increasing the open pore sizes under applied pressures. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)314-322
Number of pages9
JournalMacromolecular Research
Volume24
Issue number4
DOIs
Publication statusPublished - 2016 Apr 1

Keywords

  • electrospinning
  • nanofiber support layer
  • open pore size
  • pressure-retarded osmosis
  • salt flux

ASJC Scopus subject areas

  • Organic Chemistry
  • Materials Chemistry
  • Polymers and Plastics
  • Chemical Engineering(all)

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