This paper explores the possibility of dyeing textile fabrics with halochromic dyes. Five different halochromic dyes were tested: bromocresol purple, m‐cresol purple, chlorophenol red, curcumin and bromothymol blue. Preliminary dyeing was carried out on wool, polyacrylonitrile, polyester, polyamide 6.6, cotton and cellulose acetate at 100°C for 40 minutes to evaluate affinity. All the dyes showed good affinity to wool and polyamide 6.6. Cotton required a mordant phase before dyeing. Washing and light fastness were evaluated for the dyed fabrics, as well as colour changes at different pH values. Some fibres displayed good dye fastness and halochromic properties. Bromothymol blue was selected to dye polyamide 6.6 and cotton fabrics. The dyed fabrics displayed good halochromic properties across a pH range of 4 to 10. Cotton fabrics exhibited an immediate colour change; polyamide 6.6 changed colour after several minutes. An industrial dyeing process was performed on natural cellulosic fibres. The results confirmed the possibility of scaling up the process with regard to textile applications of halochromic dyes.

中文翻译：

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比色pH响应色的织物染色

本文探讨了用光致变色染料对织物进行染色的可能性。测试了五种不同的卤致变色染料：溴甲酚紫，间甲酚紫，氯酚红，姜黄素和溴百里酚蓝。在100℃下对羊毛，聚丙烯腈，聚酯，聚酰胺6.6，棉和乙酸纤维素进行初步染色40分钟以评估亲和力。所有染料均对羊毛和聚酰胺6.6表现出良好的亲和力。棉花在染色前需要媒染相。评价了染色织物的洗涤性和耐光性，以及在不同pH值下的颜色变化。一些纤维显示出良好的染料坚牢度和盐致变色性质。选择溴百里酚蓝为聚酰胺6.6和棉织物染色。染色的织物在4到10的pH范围内显示出良好的晕色特性。棉织物立即显示出颜色变化。几分钟后聚酰胺6.6变色。在天然纤维素纤维上进行了工业染色过程。该结果证实了就卤代变色染料的纺织品应用而言，扩大该工艺的可能性。