International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Structural Characteristics and Properties of Silk Fibroin/Polyurethane Blend Films

  • Um, In-Chul (Department of Natural Fiber Sciences, Seoul National University) ;
  • Kweon, Hae-Yong (Department of Sericulture & Entomology, National Institute of Agricultural Science and Technology, RDA) ;
  • Chang mo Hwang (Interdisciplinary program in Biomedical Engineering Major, Seoul National Uiversity) ;
  • Min, Byung-Goo (Department of Biomedical Engineering, Seoul National University) ;
  • Park, Young-Hwan (Department of Natural Fiber Sciences, Seoul National University)
  • Published : 2002.12.01
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Abstract

In this paper, silk fibroin (SF)/polyurethane (PU) blend films were fabricated to develop a new biomaterial for biomedical applications. These blend films were prepared using formic acid as a cosolvent, and structural characteristics and properties of blend films were investigated. FTIR results suggested that there was no specific interaction between SF and PU, implying molecular immiscibility in SF/PU blend films. Furthermore, it was revealed by XRD method that the crystalline region of blend components was not perturbed by counterpart polymers. The degree of phase separation of SF/PU blend films was diminished by increasing PU content in blend. Especially, the blend with 70% content of PU showed no evidence of macro-phase separation in SEM observation. However, SF/PU blend (70/30) was revealed to be phase-separated in a lower dimension confirmed by DMTA measurement. TGA result showed that thermal decomposition temperature of blend film was slightly decreased compared to those of SF and PU polymer itself, Though mechanical properties of SF/PU blend films were not good enough due to the solvent, blood compatibility of PU can be enhanced markedly by mixing with SF for SF/PU blend film.

Keywords

References

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