The effect of the production method on the mechanical strength of an alumina porous hollow fiber

Patrick de Wit, Frederique S. van Daalen, Nieck E. Benes*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

4 Citations (Scopus)

Abstract

The mechanical strength of inorganic porous hollow fibers is an important property and is strongly affected by the production method. Three production methods for fibers are compared: non-solvent induced phase separation (NIPS), bio-ionic gelation with an internal multivalent ion source (BIG-I), and with an external ion source (BIG-E). The BIG-E fibers show insufficient mechanical integrity for strength analysis. Fibers prepared via BIG-I have a larger bending strength compared to fibers prepared using NIPS or BIG-E, combined with a larger scatter in their strength data. The large scatter likely originates from surface deformations present in the fiber wall, which can be reduced by further optimization of the production method. Statistical models are fitted to the measured strength data. The NIPS and BIG-I production methods yield fibers of which the strength distribution follows the Weibull model, presuming failure occurs at the weakest link.

Original languageEnglish
Pages (from-to)3453-3459
Number of pages7
JournalJournal of the European Ceramic Society
Volume37
Issue number10
DOIs
Publication statusPublished - 1 Aug 2017

Keywords

  • Bio-ionic gelation
  • Hollow fibers
  • Mechanical strength
  • Non-solvent induced phase separation
  • Statistical analysis

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