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Improvement in the Color Fastness of Cotton Fabrics Dyed with Kale-Extracted Colorants

  • Textile Coloration and Finishing
  • Abbr : Text. Color. and Finish.
  • 2019, 31(4), pp.225~232
  • DOI : 10.5764/TCF.2019.31.4.225
  • Publisher : The Korean Society Of Dyers And Finishers
  • Research Area : Engineering > Fiber Engineering > Dyeing Engineering
  • Received : September 11, 2019
  • Accepted : November 20, 2019
  • Published : December 27, 2019

Yeonjoo Lee 1 Sukyung Kwak 1 Jang, Jin-Ho 1

1금오공과대학교 소재디자인공학과

Accredited

ABSTRACT

The colorants of kale powders were optimally extracted using an 1:1 mixture solvent of ethanol and DMSO at 105℃ for 30 minutes obtaining a high yield of 359.7㎍ /mL chlorophylls. Low color fastness of the dyed fabrics with the extracts, particularly against washing and solar radiation, can be overcome by the combined treatments of chitosan, heat setting and tannic acid. Washing fastness to color change was improved from rating 1-2 up to 5 due to the enhanced electrostatic interactions between the colorants and the positive glucosamine unit of the chitosan in the cationized cotton. In addition, the tannic acid treatment contributed to the additional increase in color fastness after the sequential treatments of chitosan pretreatment, dyeing and heat setting.

Citation status

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This paper was written with support from the National Research Foundation of Korea.