International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Recovery of Silk Sericin from Soap-Alkaline Degumming Solution

  • Yang, Yesol (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Lee, Sang Mi (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Lee, Han Sol (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University) ;
  • Lee, Ki Hoon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
  • Received : 2013.08.28
  • Accepted : 2013.09.10
  • Published : 2013.09.30
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Abstract

Sericin is usually abandoned after the degumming process. However, it could be a valuable bioresource if an economically efficient recovery process could be set up. In this study, sericin was recovered directly from the degummed waste solution by adding calcium chloride, which induced the precipitation of the surfactant, sodium oleate, by charge interaction. The recovery yield was maximum when 10% of calcium chloride was added. Further increase in the calcium chloride concentration induced the precipitation of sericin. The recovered sericin had a molecular weight distribution similar to that of the hot-water-extracted sericin; but some highmolecular- weight sericin could not be recovered. The secondary structure and amino acid composition of the recovered sericin were similar to those of conventional hot-water-extracted sericin. We expect that sericin recovered from the degummed waste solution could be an alternative to the hot-water-extracted sericin, which is widely used in various applications.

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References

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