The solvent induced interfiber adhesion and its influence on the mechanical and filtration properties of polyethersulfone electrospun nanofibrous microfiltration membranes

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Helmholtz-Zentrum Geesthacht
  • Kiel University

Abstract

Electrospun nanofibrous membranes (ENMs) as a novel class of energy saving membranes are under extensive investigation. This kind of membranes are highly porous and permeable however mechanically weak. In the current study, we benefited the residual solvent of the electrospun nanofibers to induce an interfiber adhesion through a thermal treatment. This approach was successful in enhancement of the mechanical properties of the electrospun nanofibrous membrane probed via tensile test and nanoindentation as a higher elastic modulus and compaction resistance, respectively. The mechanically stronger membrane possesses a higher resistance against tensile disintegration thereby a lower water flux at high feed pressures. Through a particle challenge test i.e. filtration of a TiO2 aqueous nanosuspension under an incremental feed pressure of 1-2 bar, we could also show that a mechanically resistant ENM can offer a more optimum filtration efficiency mainly due to its higher structural integration. (C) 2012 Elsevier B.V. All rights reserved.

Details

Original languageEnglish
Pages (from-to)456-463
Number of pages8
JournalSeparation and Purification Technology
Volume98
Publication statusPublished - 19 Sep 2012
MoE publication typeA1 Journal article-refereed

    Research areas

  • Electrospinning, Nanofibrous membranes, Water filtration, Mechanical properties, SENSING INDENTATION, NANOINDENTATION, LOAD

ID: 13594853