Synthesis of Modified Bromothymol Blue Having Long Alkyl Substituents for Application to Textile-based Chromogenic Basicgas Sensors

• Published in: Fibers and polymers pp. 2497 - 2505
• Main Authors: 이준헌, 장영재, 이나경, 박남주, 김태경
• Format: Journal Article
• Language: English
• Published: 한국섬유공학회 01.09.2022
• Subjects: 섬유공학
• ISSN: 1229-9197; 1875-0052

A textile-based chromogenic sensor was fabricated to react against small amount of gas phase alkaline chemicals. A modified bromothymol blue (mBTB) having two linear pentyl substituents on the chromophore was synthesized to givegood affinity and wash fastness on nylon substrates as well as recognizable color change by exposure to gas phase basicchemicals such as ammonia and alkylamines. The color change properties of the mBTB were examined in solution and onnylon fabrics at various alkaline conditions. The nylon fabric dyed with mBTB exhibited very sensitive and rapid reactionshowing color change over 50 from orange to dark khaki even at 10 ppm of ammonia in a couple of minutes. The textilesensor appeared to be reused more than 20 repeat cycles. The textile sensor was tested for fastness to washing, rubbing andlight. The wash fastness of mBTB was significantly improved compared to the conventional bromothymol blue. KCI Citation Count: 0