Textile Coloration and Finishing (한국염색가공학회지)

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

The Effect of Organic Solvent in the Dyeing of Silk Fiber (II) -The Change of Dyeability by Addition of Ureas-

견섬유의 염색에 있어서 첨가용제의 영향(II) -요소류 첨가에 따른 염색성의 변화-

  • Yoon, Nam-Sik (Department of Dyeing and Finishing, College of Engineering, Kyungpook National University, Taegu 702-701) ;
  • Lim, Yong-Jin (Department of Dyeing and Finishing, College of Engineering, Kyungpook National University, Taegu 702-701) ;
  • Lee, Dong-Soo (Department of Silk Fiber Science, College of Agriculture, Kyungpook National University, Taegu 702-701) ;
  • Rhee, In-Jeon (Department of Silk Fiber Science, College of Agriculture, Kyungpook National University, Taegu 702-701)
  • Published : 1990.09.01
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Abstract

The effect of urea and its derivatives, which are known as structure breakers of water, in the dyeing of silk with acid dyes was investigated. Without ureas the maximum dye uptake was observed at $60^{\circ}C$ when dyed with Milling Cyanine 5R, but in the presence of ureas the maximum dye uptake was decreased and its temperature also shifted to lower regin in the order of urea >N-methyl urea > N,N-dimethyl urea>tetramethyl urea. These tendencies were more marked in the dyeing of silk fiber with Orange II, a typical levelling type acid dye. These can be interpreted as the decrease in the hydropholic interaction between fiber molecules which results in the broadening of the inter micelie spacing. The increased partition coefficient of dye molecules in the bath by the action of ureas also contributes to dyeing results, and it can be seen from the spectral characteristics of dyes in aqueous urea solution.

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