Jariyapunya Nareerut, Hathaiwaseewong Sunee, Roungpaisan Nanjaporn, Venkataraman Mohanapriya
Department of Textile Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand.
Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, 461 17 Liberec, Czech Republic.
Materials (Basel). 2025 Apr 29;18(9):2042. doi: 10.3390/ma18092042.
This study focused on developing a color-changing fabric face mask for fever detection. Reversible Thermochromic Leuco dye (RTL) was applied as an indicator to alert wearers of elevated body temperatures, with the color change occurring at 37.5 °C. Five fabric types Polyethylene (PE), cotton (CO), a cotton-polyester blend (TC), polyester (PL), and Polyamide (PA) were coated with blue RTL to evaluate their color change responsiveness. The results showed that fabrics with higher thermal conductivity (), thermal absorptivity (), and heat flow () exhibited faster color transitions. RTL-coated PE fabric demonstrated the best performance, with a thermal absorptivity of 312.8 WsmK and a heat flow of 2.11 Wm, leading to a rapid color-change time of approximately 4.20 s. Although PE fabric had a lower thermal conductivity (57.6 × 10 WmK) compared to PA fabric 84.56 (10 WmK), the highest thickness 0.65 mm of PA fabric slowed its color-change reaction to 11.8 s. When selecting fabrics for optimal heat transfer, relying solely on fiber type or thermal conductivity () is insufficient. The fabric's structural properties, particularly thickness, significantly impact thermal resistance (). Experimental results suggest that thermal absorptivity and heat flow are more effective criteria for fabric selection, as they directly correlate with color-change performance.
本研究专注于开发一种用于发热检测的变色织物口罩。可逆热致变色无色染料（RTL）被用作指示器，以提醒佩戴者体温升高，颜色变化发生在37.5°C。用蓝色RTL对聚乙烯（PE）、棉（CO）、棉涤混纺（TC）、聚酯（PL）和聚酰胺（PA）五种织物类型进行涂层处理，以评估它们的颜色变化响应性。结果表明，具有较高热导率、热吸收率和热流的织物表现出更快的颜色转变。涂有RTL的PE织物表现最佳，热吸收率为312.8WsmK，热流为2.11Wm，颜色变化时间约为4.20秒。尽管PE织物的热导率（57.6×10WmK）低于PA织物（84.56×10WmK），但PA织物的最高厚度0.65mm使其颜色变化反应减慢至11.8秒。在选择用于最佳热传递的织物时，仅依靠纤维类型或热导率是不够的。织物的结构特性，特别是厚度，对热阻有显著影响。实验结果表明，热吸收率和热流是更有效的织物选择标准，因为它们与颜色变化性能直接相关。
