Ultrafiltration membranes with a thin poly(styrene)- b -poly(isoprene) selective layer

Sarah E. Querelle, Elizabeth A. Jackson, Edward L. Cussler, Marc A. Hillmyer

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58 Scopus citations


Ultrafiltration membranes with an 80 nm thick block polymer derived selective layer containing 20 nm cylindrical pores were prepared by removing poly(lactide) (PLA) from a poly(styrene)-b-poly(isoprene)-b-poly(lactide) (PS-PI-PLA) film onto a microporous polymer support. The block polymer film adopted a core(PLA)-shell(PI) cylindrical morphology in which vertically-oriented PLA cylinders were degraded to leave PI-lined channels in a PS matrix. Thanks to the combination of PS and PI in the nanoporous matrix, chemical cross-linking was not needed to provide mechanical stability in the thin film. The membranes showed a hydraulic flux of 165 L m-2 h -1 bar-1 and were able to size-discriminate poly(ethylene oxide) (PEO) solutes in agreement with theoretical predictions.

Original languageEnglish (US)
Pages (from-to)5044-5050
Number of pages7
JournalACS Applied Materials and Interfaces
Issue number11
StatePublished - Jun 12 2013


  • composite membrane
  • self-assembly
  • size-selective rejection
  • triblock terpolymer
  • ultrafiltration
  • water treatment


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