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Effect of Extractant on the Color Characteristics of Natural Colorant Extracts

  • Textile Coloration and Finishing
  • Abbr : Text. Color. and Finish.
  • 2016, 28(1), pp.1-13
  • DOI : 10.5764/TCF.2016.28.1.1
  • Publisher : The Korean Society Of Dyers And Finishers
  • Research Area : Engineering > Fiber Engineering > Dyeing Engineering
  • Received : February 24, 2016
  • Accepted : March 10, 2016

Young-Hee Lee 1 Han-Do Kim 1 Young-Mee Baek 1 Young Mee Baek 1 Jung-Soo Kim 2 Dong-Jin Lee 2

1부산대학교
2한국신발피혁연구원

Accredited

ABSTRACT

Abstract Natural colorant extracts were obtained by extraction from tumeric root, gardenia seeds, mugwort and green tea using water, methanol, ethanol and acetone as extractants at room temperature for 3 hours under shaking condition(180rpm) with liquor ratio(solid:solvent; 1:100). The main pigment components of tumeric root, gardenia seeds, mugwort and green tea are known to be curcumin, crocin, chlorophyll b and epigallocatechin gallate, respectively. The effects of the kind of extractant and pH on the color characteristics of natural colorant extracts were investigated. The solubility parameters of pigment components were determined to find adequate extractant. The solubility parameters of curcumin, crocin, chlorophyll b and epigallocatechin gallate were found to be 27.85, 29.40, 19.48 and 37.97(J/cm3)1/2. As expected, solvents that have a solubility parameter similar to that of pigment component were generally found to be effective to obtain pigment extracts having high visible absorbance(A). The extract(pigment/solvent) with high visible absorbance was generally found to have low L*(lightness) and high Chroma(C*, purity).

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