Oil/water separation via ultrafiltration by novel triangle-shape tri-bore hollow fiber membranes from sulfonated polyphenylenesulfone

Lin Luo, Gang Han, Tai-Shung Chung*, Martin Weber, Claudia Staudt, Christian Maletzko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

By employing the novel sulfonated polyphenylenesulfone (PPSU) polymer with super-hydrophilic nature as membrane material, triangle-shape tri-bore hollow fiber (TBF) ultrafiltration (UF) membranes have been fabricated via a newly designed dual-layer tri-needle spinneret. The sulfonation degree of PPSU not only plays a key role in forming a fully sponge-like structure, but also enhances membrane hydrophilicity. The separation performance and fouling behavior of the newly developed TBF membranes were systematically studied for oil/water separation. The critical and threshold fluxes of TBF UF membranes were determined as a function of sulfonation degree through pressure stepping experiments. Above threshold fluxes, their UF behaviors were studied under the same experimental conditions to filtrate a 5000. ppm petroleum/water emulsion. Interestingly, the sulfonated TBFs always exhibit higher permeate fluxes and lower total resistance than the pristine PPSU membranes. In addition, analyses by the resistance-in-series model indicate that the sulfonated PPSU membranes display much lower resistances from static foulant adsorption and irreversible fouling. Clearly, the sulfonated membranes become less fouled and easier to regenerate. After UF through TBF membranes, the permeate water appears quite clean with low turbidity and high TOC rejection larger than 95.4%.

Original languageEnglish (US)
Pages (from-to)162-170
Number of pages9
JournalJournal of Membrane Science
Volume476
DOIs
StatePublished - Feb 5 2015

Keywords

  • Oil water separation
  • Resistance-in-series model
  • Tri-bore hollow fiber membrane
  • Triangle outer geometry
  • Ultrafiltration

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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