Pakolpakçıl Ayben, Draczyński Zbigniew
Institute of Materials Science of Textiles and Polymer Composites, Lodz University of Technology, 116 Żeromskiego Street, 90-924 Lodz, Poland.
Materials (Basel). 2021 Nov 17;14(22):6949. doi: 10.3390/ma14226949.
Chemicals and industrial gases endanger both human health and the environment. The inhalation of colourless ammonia gas (NH) can cause organ damage or even death in humans. Colourimetric materials are becoming more popular in the search for smart textiles for both fashion and specific occupational applications. Colourimetric textile sensors based on indicator dyes could be very useful for detecting strong gaseous conditions and monitoring gas leaks. In this study, black carrot extract (BCE) as a natural indicator dye and polyurethane (PU) polymer were used to develop a colourimetric sensor by electrospinning. The properties of the BCE/PU nanofibrous mats were characterized by the Fourier transform infrared spectrum (FTIR) and a scanning electron microscope (SEM). The BCE caused a change in the morphology of the PU nanofibrous mat. To evaluate the colour shift due to NH vapour, the BCE/PU nanofibrous mats were photographed by a camera, and software was used to obtain the quantitative colour data (CIE Lab). The BCE/PU nanofibrous exhibited a remarkable colour change from pink-red to green-blue under NH vapour conditions with a fast response time (≤30 s). These findings showed that colourimetric nanofibrous textile sensors could be a promising in situ material in protective clothing that changes colour when exposed to harmful gases.
化学物质和工业气体对人类健康和环境都有危害。吸入无色氨气（NH）会对人体造成器官损伤甚至死亡。在寻找用于时尚和特定职业应用的智能纺织品时，比色材料越来越受欢迎。基于指示剂染料的比色纺织传感器对于检测强气态条件和监测气体泄漏可能非常有用。在本研究中，黑胡萝卜提取物（BCE）作为天然指示剂染料和聚氨酯（PU）聚合物被用于通过静电纺丝开发一种比色传感器。通过傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）对BCE/PU纳米纤维垫的性能进行了表征。BCE导致了PU纳米纤维垫形态的变化。为了评估由于NH蒸汽引起的颜色变化，用相机拍摄了BCE/PU纳米纤维垫，并使用软件获得定量颜色数据（CIE Lab）。在NH蒸汽条件下，BCE/PU纳米纤维呈现出从粉红到蓝绿色的显著颜色变化，响应时间快（≤30秒）。这些发现表明，比色纳米纤维纺织传感器可能是一种有前途的原位材料，用于制作在接触有害气体时会变色的防护服。
