Block copolymer hollow fiber membranes with catalytic activity and pH-response

Roland Hilke, Pradeep Neelakanda, Poornima Madhavan, Ulla Vainio, Ali Reza Behzad, Rachid Sougrat, Suzana Pereira Nunes, Klaus-Viktor Peinemann

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

We fabricated block copolymer hollow fiber membranes with self-assembled, shell-side, uniform pore structures. The fibers in these membranes combined pores able to respond to pH and acting as chemical gates that opened above pH 4, and catalytic activity, achieved by the incorporation of gold nanoparticles. We used a dry/wet spinning process to produce the asymmetric hollow fibers and determined the conditions under which the hollow fibers were optimized to create the desired pore morphology and the necessary mechanical stability. To induce ordered micelle assembly in the doped solution, we identified an ideal solvent mixture as confirmed by small-angle X-ray scattering. We then reduced p-nitrophenol with a gold-loaded fiber to confirm the catalytic performance of the membranes. © 2013 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)7001-7006
Number of pages6
JournalACS Applied Materials & Interfaces
Volume5
Issue number15
DOIs
StatePublished - Aug 5 2013

ASJC Scopus subject areas

  • Materials Science(all)

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