Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Dyeing of Nylon 66 Woven Fabric Using Bromocresol Purple and Color Change in Acidic Solution

Bromocresol purple을 이용한 나일론 직물의 염색 및 산성 용액에서의 색변화

  • Yoo, Hyun Woo (Department of Fiber System Engineering, Dankook University) ;
  • Lee, Da Eun (Department of Fiber System Engineering, Dankook University) ;
  • Lee, Jung Jin (Department of Fiber System Engineering, Dankook University)
  • 유현우 (단국대학교 파이버시스템공학과) ;
  • 이다은 (단국대학교 파이버시스템공학과) ;
  • 이정진 (단국대학교 파이버시스템공학과)
  • Received : 2021.01.15
  • Accepted : 2021.02.24
  • Published : 2021.02.28
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Abstract

Strong acids, such as hydrochloric acid and sulfuric acid, are colorless and difficult to detect when leaked by accident. A chemosensor using a halochromic dye can serve as a simple and easy detection method by exhibiting different colors when exposed to acidic liquids. In this study, bromocresol purple was used as a pH-indicating dye for detecting acidic liquids. Nylon 66 woven fabric was dyed with bromocresol purple, and the dyeing properties were investigated. The pH-sensing property was also investigated by dipping the dyed nylon fabric in an acidic solution. Bromocresol purple in an aqueous solution showed maximum absorption at 433 nm with a yellow color at pH 2-4, and at 589 nm with a blue color at pH above 6. The color yield (K/S) of bromocresol purple on nylon 66 is highly dependent on the dyebath pH. When the yellow sample, which was dyed at pH 3 or less, was immersed in a solution with pH 2-3.5, its original orange color was maintained. Then, the color turned blue when immersed in a solution with pH 4-5.5. In contrast, olive or olive green samples were obtained when dyed at pH 4-6. When the sample was immersed in a solution with pH 2-3.5, the color changed to yellow. The color also changed to blue when the sample was dipped in a solution with pH 4-5.5. The wash fastness of the fabric dyed at pH 3-5 ranged from very good to excellent.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(No. 2019R1F1A1062860). 본 연구는 단국대학교 파이버시스템공학과 소속 저자의 결과물로서 해당 학과는 2020년도 단국대학교 대학혁신지원사업 연구중심학과 육성사업 지원을 받았음.

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