Textile Coloration and Finishing (한국염색가공학회지)

The Korean Society of Dyers and Finishers (한국염색가공학회)
권호 표지

Catechins Content and Color Values of Silk Fabrics Dyed with Korean Green Tea Extracts

녹차 염색 견포의 카테킨 함량 및 색상변화

  • Son, Ji-Hyon (Department of clothing and Textiles, Dong-Eui Univ.) ;
  • Lee, Myung-Sun (Department of clothing and Textiles, Dong-Eui Univ.) ;
  • Chun, Tae-Il (Department of clothing and Textiles, Dong-Eui Univ.)
  • 손지현 (동의대학교 생활과학대학 패션디자인학과) ;
  • 이명선 (동의대학교 생활과학대학 패션디자인학과) ;
  • 천태일 (동의대학교 생활과학대학 패션디자인학과)
  • Published : 2006.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Despite several recent attempts to measure the concentration of individual catechins by HPLC, it has not been so easy to separate catechins accurately. The aim of the present work is to provide a proper condition for separating each component of catechins by HPLC analysis, and also to evaluate the experimental variables including color differences, and metal ion contents after dyeing and mordanting. Four kinds of Catechins, (-)-epicatechin(EC), (-)-epicatechin gallate(ECG), (-)-epigallocatechin(EgC), (-)-epigallocatechin gllate(EgCG) were isolated from the residues after dyeing. Catechins in Korean green tea leaves are richer when e tea leaves are younger. Higher concentration of catechins owes it to e way it is processed. The contents of catechins adsorbed in silk fabrics after dyeing were in order of EGCG>ECG>EGC>EC. We have found $68\%$ uptake of EGCG, and 116.8mg of EGCG in the silk fabrics after it was dyed with $1\%$ Korean green tea extracts. The absorbance intensity and K/S values of dyed silk fabrics were increased with dyeing temperature and time. Only the surface color of the silk fabric dyed with green tea extracts was yellowish red, but it changed from yellowish red to red with an increase in the mordant concentration. Post-mordanted silk fabrics with ferrous sulfate changed from yellowish red to red and purple color shade. In a practical evaluation, there is no significant change in color after twenty times of the continuous dry cleaning process. However, post-mordanted fabrics with ferrous sulfate faded the brightness of color after dry cleaning. Dyeing silk fabrics with a Korean tea extract reduced the metal ion contents in the silk fabrics when compared to the untreated silk fabrics. Metal contents in silk fabrics dyed and post-mordanted with $1\%$ each metal solution were 0.194 ppm for Aluminum, 1.601ppm for Copper, and 0.334 ppm for Iron. After the post-mordanting process, the heavy metal ion absorption increased, which was mainly attributed to the catechins and polyphenols in dyed silk fabrics.

Keywords

References

  1. Y. S. Cho, H. S. Kim, S. K. Kim, O. C. Kwon, S. J. Jeong, and Y. M, Lee, Antibacterial and Bactericidal Activity of Green Tea Extracts, J. Kor. Tea Soc. 3, 89-103(1997)
  2. H. H. Rah, S. O. Baik, S. B. Han, and J. Y. Bock, Chemical compositions of the seed of korean green tea plant(Camellia sinecis L.), J. Korean Agric. Chem. Soc., 35, 272-275(1992)
  3. H. H. Rah, S. O. Baik, S. B. Han, and J. Y. Bock, Improvement of analytical method for catechins in green tea, J. Korean Agric. Chem. Soc., 35, 276-280(1992)
  4. E. H. Lee, J. K. Lee, J. T. Hong, K. M. Jung, Y. K. Kim, S. H. Lee, S. Y. Chung, and Y. W. Lee, J. Fd. Hyg. Safety, 16, 117-124(2001)
  5. K. R. Cho, Studies on the Natural dyes(I), J. Korean Soc. Cloth. & Text., 11, 25(1987)
  6. K. R. Cho, Characteristics and Dyeing Properties of Arrowroot Leaves Colors, J. Korean Soc. Cloth. & Text., 15, 281-288(1991)
  7. Y. S. Cho, H. S. Kim, S. K. Kim, O. C. Kwon, S. J. Jeong, and Y. M. Lee, Antibacterial and Bactericidal Activity of Green Tea Extracts, J. Kor. Tea Soc., 3, 89-103(1997)
  8. J. K. Jung, C. H. Yu, T. Y. Chung, and S. M. La, A study on the Korean Green Tea(II), K. J. N., 6, 187-196(1973)
  9. B. S. Baek, M. S. Thesis, 'Studies on antioxidative and antimutagenic mechanisms of epicatechin 3-O-gallate isolated from green tea', Pusan National University, Korea, 1995
  10. S. Sakanaka, M. Taniguchi, M. Kim, and T. Yamamoto, Antibacterial substances in Japanese green tea extract against streptococcus mutans, a carcinogenic bacterium, Agric. Bio. Chem., 55, 2307-2311(1989)
  11. P. L. Fernandez, Martin Valero, M. J., Gonzalez, A. G., Pablos, and F. de, HPLC determination of catachins and caffeine in tea-Differentiation of green, black and instant teas, Analyst., 125, 421(2000) https://doi.org/10.1039/a909219f
  12. I. S. Kye, Ph. D. Thesis, 'Studies on scavenging activity of peroxinitrite and reactive oxgen species of green tea polyphenols', Pusan National University, Korea, 1999
  13. M. S. Ko, et al., 'Food and Culture', www.hoyil.com, Seoul, p.156, 1996
  14. S. H. Choi, B. H. Lee and H. D. Choi, Analysis of Catechin Contents in Comercial Green Tea By HPLC, J. Korean Soc. Food Nutr., 21, 386-389(1992)
  15. Y. S. Shin and H. Choi, Characteristics and Dyeing Properties of Green Tea Colorants-(Part I), J. Korean Soc. Cloth. Text., 23, 140 -146(1999)
  16. Y. S. Shin and H. Choi, Characteristics and Dyeing Properties of Green Tea Colorants(Part II), J. Korean Soc. Cloth. Text., 23, 385-390 (1999)
  17. Y. S. Shin and H. Choi, Characteristics and Dyeing Properties of Green Tea Colorants(Part III), J. Korean Soc. Goth. Text., 23, 510-516(1999)
  18. S. C. Choi, H. S. Jung and T. I. Chun, The Effect of Natural Mordants on the Silk Fabrics Dyed with Green Tea Extracts(I), J. Korean Soc. Dyers & Finishers, 11, 175-182(1999)
  19. K. I. Park, M. S. Thesis 'Study on Natural Mordant Treatment of Silk Fabrics Dyed with Green Tea Extract', Pusan National University, Korea, 1998
  20. M. K, Kim, M. S. Thesis, 'A Study on Fastness of Pleochroismic Natural Dyes', Hongik University, Korea, 1985
  21. S. M. Jeon, M. S. Thesis, 'Functional of fabrics dye with green tea leaf extract', Pusan National University, Korea, 2002
  22. Park, Sung Mi, M. S. Thesis, 'Extraction of tannin from acorn and the effect of treatment of the Silk', Pusan National University, 1994
  23. J. H. Sul, Ph. D. Thesis, 'A Study on Tannin Treatment of Silk Fabrics', Pusan National University, Korea, 1994