Natural anthocyanin-based wearable colorimetric pH indicator with high color fastness

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-03-28 DOI:10.1016/j.dyepig.2025.112789

Wenbin Zhu , Zemin Ma , Liwen Zhang , Chunbing Yang , Fujun Xu , Jiangyong Yu

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引用次数: 0

Abstract

Smart textiles with real-time visual monitoring abilities of environmental pH hold significant importance in wearable products. Natural dyes have gained growing interest as eco-friendly pH indicators, however, their stability and large-scale isolation remain challenging. In this work, we developed a type of pH-monitoring colorimetric indicator based on anthocyanins, a natural dye extracted from red cabbage, with enhanced affinity to cotton fiber substrates by utilizing metal salts and biopolymers. Compared to cotton fabric directly dyed with pristine anthocyanins, this colorimetric fabric demonstrates higher color contrast, superior reversibility of color change, and enhanced light and washing color fastness. The color strength (K/S) was significantly improved from 0.136 for untreated fabric to 1.266 for colorimetric fabric, and the excellent colorimetric properties maintained either after over 20 h washing or 12 h exposure to sunlight. This work addressed the issue of the easy light degradation of biomaterials, and provided a feasible optimization strategy for the development and application of environment-responsive biomass colorimetric textiles as smart and wearable products.

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天然花青素耐磨比色pH指示剂，高色牢度

具有环境pH值实时可视化监测能力的智能纺织品在可穿戴产品中具有重要意义。天然染料作为生态友好型pH指示剂越来越受到人们的关注，然而，它们的稳定性和大规模分离仍然具有挑战性。在这项工作中，我们开发了一种基于花青素的ph监测比色指示剂，花青素是一种从红甘蓝中提取的天然染料，利用金属盐和生物聚合物增强了对棉纤维底物的亲和力。与原始花青素直接染色的棉织物相比，这种比色织物具有更高的颜色对比度，更好的颜色变化可逆性，并且增强了光和洗涤色牢度。比色强度（K/S）由未处理织物的0.136提高到比色织物的1.266，洗涤20 h以上或日晒12 h后仍能保持优异的比色性能。本研究解决了生物材料易光降解的问题，为环境敏感型生物质比色纺织品智能可穿戴产品的开发和应用提供了可行的优化策略。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.