Cellulose acetate membranes for osmosedimentation: Performance and morphological dependence on preparation conditions

Suzana Nunes*, Fernando Galembeck, Nilso Barelli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Osmosedimentation is a new membrane-assisted separation technique, based on the rapid approach to sedimentation equilibrium when macromolecular solutions are contained within dialysis cells, in contact with solvent via a permselective membrane. Cellulose acetate membranes, cast from ternary solvent (acetone, acetic acid, water) solutions are suitable for osmosedimentation of proteins at low (2000 rpm) centrifugation speeds. Solute retention is improved when acetone-rich casting solutions are used. These membranes were examined by electron and optical microscopy, showing considerable morphological changes in the membrane support layer as the casting solution composition is changed.

Original languageEnglish (US)
Pages (from-to)937-943
Number of pages7
JournalPolymer
Volume27
Issue number6
DOIs
StatePublished - Jan 1 1986

Keywords

  • membrane morphology
  • osmosedimentation

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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