Dissolving Feather Keratin Using Sodium Sulfide for Bio-Polymer Applications |
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Authors: | Andrew J Poole Russell E Lyons and Jeffrey S Church |
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Institution: | (1) CSIRO Materials Science and Engineering, PO Box 21, Belmont, VIC, 3216, Australia;(2) CSIRO Livestock Industries, 306 Carmody Rd, St. Lucia, QLD, 4067, Australia; |
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Abstract: | Feather keratin has been widely studied for use as a bio-based material. In this paper, we dissolve feather keratin using
industrial sodium sulfide to investigate the yield, dissolved keratin characteristics, and properties of regenerated products
to assess the potential of using sodium sulfide as a means of converting waste feathers into a bio-polymer. Optimal conditions
appeared to require short incubation times in order to give maximum strength in the regenerated product. This limits the yield
to approximately 55%. Air-dried films and acid-precipitated samples are all readily re-crosslinked, suggesting the re-crosslinking
process is robust. Minimizing exposure to the highly alkaline conditions appears favorable to final product strength through
minimizing alkaline chain damage. The β-sheet structure of the parent keratin is largely maintained. The regenerated keratin
was shown to have potentially attractive physical properties for use as a bio-polymer. |
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