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The Degumming and Sericin Recovery of the Silk fabric Using the Electrolytic Water


Natural silk is formed by two proteins : the crystalline fibroin (inside the silk thread) and amorphous sericin (as a tube outside the thread). The degumming process is used to eliminate the external sericin prior to dyeing ; generally it makes use of soaps at about pH 10. Sericin is the protein constituent that "gums"together the fibroin filaments of cocoon silk. It constitutes about 25% of the weight of the cocoon, is soluble in hot water and "gels" on cooling. The removal of sericin from raw silk, known as degumming, is a simple but important process usually employing hot dilute soap or alkaline solution and occasionally dilute acids or enzymic methods. During degumming, alkali is taken up by the sericin and the free acid from the soap is formed ; this may be deposited on the fiber, reducing the rate of degumming and protecting it from hydrolysis. Alkali is often added to maintain or restore the pH of the baths, but it is rarely used alone, since it leaves the silk rather harsh in handle. If complete sericin removal is required as for printing, sodium carbonate may be added. If the pH of the bath exceeds 11, the fibroin is attacked. Recently, According to the development of electrolysis, we can be obtained the electrolytic reduction water(above pH 11.5) and electrolytic oxidation water (below pH 3). The aim of this work was to study a degumming process using electrolytic water and a possibility of sericin recovery. The new degumming process used electrolytic water operates at $95^\circ{C}$ for 2hr. without any reagents. The wastewater of this process are formed by a solution of sericin in water. This conditions suggest the study of a possible recovery of this protein (sericin) which has an amino acid composition suitable for many used in cosmetics, textile finishing agents, animal feeding, etc. The degumming process using electrolytic water is available to reduce treatment costs and pollute and at the same time to recover sericin.

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참고문헌 (13)

  1. 加藤弘 , 絹纖維の加工技術とその應用 / v.,pp.3-25, 1990
  2. 上平恒 , 水の分子工學 / v.,pp.46-76, 1998
  3. A study on the Degumming of Waste Silk for Spinning by Bacteria , Ji Hyoung Woo , J. of the Korean Society of Textile Eng. and Chemists / v.,pp., 1979
  4. 生命の水硏究所(I編) , 檢證アルカリイオン水 / v.,pp.16-33, 1998
  5. Graft Copolymerization to Proteins(Ⅱ). Separation and Purification of Sericin, and Its Graft Copolymerization with Acrylonitrile , Iwhan Cho;Kwang-Kun Kim , J. of the Korean Chemical Society / v.20,pp.309, 1976
  6. 佐藤敦久(編著) , 水處理 / v.,pp.17-24, 1992
  7. The Study on the Sericin Fixation Mechanism , Do Gyu Bae , Korean J. Seric. Sci. / v.37,pp.137, 1995
  8. Treatment of Waste Water from Silk Degumming Processes for Protein Recovery and Water Reuse , C. Fabiani;M. Pizzichini;M. Spadoni;G. Zeddita , Desalination / v.105,pp.1-9, 1996
  9. Studies on the Scouring Effects of Scouring Soap Made from Rapeseed Oil , Do Gyu Bae;Hyun Seok Bae , Korean J. Seric. Sci. / v.35,pp.43, 1993
  10. Hydrolysis of Silk Fibroin on Alkali Conditions , Nam Jung Kim;Do Gyu Bae , Korean J. Seric. Sci. / v.39,pp.197, 1997
  11. The Study on the Sericin Fixation by Formalin and Glutaraldehyde Mixture , Do Gyu Bae , Korean J. Seric. Sci. / v.36,pp.152, 1994
  12. A Comparative Study on the Raw Cocoon Degumming of Soap and Protease , Pyong Ki Pak , J. of the Korean Society of Tex. Eng. and Chemists / v.14,pp.94, 1977
  13. The Study on the Weight loss Finishing for the Mixture of Silk/Polyester - I. The weight loss Finishing for the Raw-silk /Polyester , Do Gyu Bae , Korean J. Seric. Sci. / v.35,pp.114, 1993

이 논문을 인용한 문헌 (1)

  1. 2004. "A Study on Scouring Processes Using Electrolyzed Water(I) - Polyester/Cotton Knit-" 韓國纖維工學會誌 = Textile science and engineering, 41(3): 203~209 


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