Clean Technology (청정기술)

The Korean Society of Clean Technology (한국청정기술학회)
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Diffusion rate of C. I. Disperse Yellow 54 Dye in PTT and PET Textiles in the Presence of Supercritical Carbon Dioxide

초임계이산화탄소에 의한 PTT와 PET섬유 내에서의 C. I. Disperse Yellow 54염료의 확산속도

  • Ihm, Bang-Hyun (School of Display and Chemical Engineering, Yeungnam University) ;
  • Choi, Jun-Hyuck (School of Display and Chemical Engineering, Yeungnam University) ;
  • Shim, Jae-Jin (School of Display and Chemical Engineering, Yeungnam University)
  • 임방현 (영남대학교 공과대학 디스플레이화학공학부) ;
  • 최준혁 (영남대학교 공과대학 디스플레이화학공학부) ;
  • 심재진 (영남대학교 공과대학 디스플레이화학공학부)
  • Published : 2007.12.31
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Abstract

Sorption of C. I. Disperse Yellow 54 dye in poly(trimethylene terephthalate) (PTT) and poly (ethylene terephthalate) (PET) textile fibers were measured at various pressures, temperatures, and times in the presence of supercritical carbon dioxide and thereby the diffusivities of the dye in the fibers were calculated. The diffusivity of dye in the polymeric fibers was very low, only in the order of $10^{-12}\;cm^2/sec$, but increased with increasing temperature at constant pressure and with increasing pressure at constant temperature. The diffusivity in PTT fibers were about 1.5 to 3 times as large as that in PET fibers. As the fiber was very thin, the dye distribution in the fiber was almost uniform everywhere inside the fiber.

초임계이산화탄소 분위기 하에서 C. I. Disperse Yellow 54 분산염료의 수착량을 압력, 온도 및 시간에 따라 측정하여 고분자 섬유인 PTT (poly(trimethylene terephthalate))와 PET (poly(ethylene terephthalate)) 내에서의 염료의 확산속도를 계산하였다. 고분자 섬유 내에서의 염료의 확산계수(diffusivity)는 $10^{-12}\;cm^2/sec$의 매우 작은 값을 가지며, 일정 압력에서 온도가 증가함에 따라, 그리고 일정 온도에서 압력이 증가함에 따라 그 값이 증가하였다. 또한 PTT 내에서의 확산계수는 PET 내에서의 확산계수의 $1.5{\sim}3$ 배 정도로 더 높았다. 섬유가 매우 가늘므로 섬유 내에서의 농도는 거의 균일하였다.

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