Rheological Behaviors of Aqueous Solution of Silk Fibroin.

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  • Ochi Akie
    Department of Molecular and Material Sciences, IGSES, Kyushu University
  • Nemoto Norio
    Department of Molecular and Material Sciences, IGSES, Kyushu University
  • Magoshi Jun
    National Institute of Agrobiological Resources CREST, Japan Science and Technology Corporation
  • Ohyama Eiji
    Department of Molecular and Material Sciences, IGSES, Kyushu University
  • Hossain Khandker
    Department of Molecular and Material Sciences, IGSES, Kyushu University CREST, Japan Science and Technology Corporation

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Other Title
  • 絹フィブロイン水溶液のレオロジー
  • キヌ フィブロイン スイヨウエキ ノ レオロジー

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Abstract

Rheological measurements were made on aqueous solution of native silk fibroin extracted from the MM part of the silk grand of Bombyx mori silkworm and also on that of regenerated silk fibroin at finite polymer concentration. Steady flow behaviors were found to be distinctly different between two solutions. The native silk fibroin solutions exhibited dynamic viscoelastic properties characteristic of the pseudo plateau modus in the low angular frequency region as well as peculiar thermo rheological behaviors, whereas the regenerated silk fibroin solutions behaved as viscous fluid. Rheological properties of the native silk fibroin solution were interpreted in terms of the protein complex called the elementary unit (EU), which gives rise to development of viscoelastic network even in the dilute regime.

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