Extrusion of feather keratin

  • Barone J
  • Schmidt W
  • Gregoire N
  • 53

    Readers

    Mendeley users who have this article in their library.
  • 66

    Citations

    Citations of this article.

Abstract

Keratin obtained from poultry feathers was extruded at 120°C using a combination of glycerol, water, and sodium sulfite as processing aids. Rheological properties were assessed as a function of water, glycerol, and sodium sulfite content as well as extruder die temperature. The lowest viscosity blends at a constant feather keratin concentration of 60 wt % were found at glycerol concentrations that were higher than the water concentration and sodium sulfite concentrations of 3–4 wt % of the feather keratin fraction. For the melt state, higher or lower sodium sulfite concentrations resulted in increased viscosity. In the solid state, it was observed that processing induced orientation increased the tensile properties of the extrudates. Raman spectroscopy and DSC showed that there was a transition from α-helix to β-sheet at sodium sulfite concentrations of less than 4 wt %. At greater sodium sulfite concentration, increased crystallinity was found, because keratin chains could be extended more during processing. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1432–1442, 2006

Author-supplied keywords

  • Biopolymers
  • Extrusion
  • Proteins
  • Raman spectroscopy

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free