Department of Chemical and Biological Engineering, Tufts University Science and Technology Center, 4 Colby Street, Medford, MA, 02155, USA.
Nano Lab, Tufts University Advanced Technology Laboratory, 200 Boston Suite 2600, Medford, MA, 02155, USA.
Sci Rep. 2019 Apr 4;9(1):5607. doi: 10.1038/s41598-019-42054-8.
A fabrication method for a stable entrapment of optically responsive dyes on a thread substrate is proposed to move towards a detection system that can be integrated into clothing. We use the dyes 5,10,15,20-Tetraphenyl-21H,23H-porphine manganese(III) chloride (MnTPP), methyl red (MR), and bromothymol blue (BTB), for a proof-of-concept. Our optical approach utilizes a smartphone to extract and track changes in the red (R), green (G) and blue (B) channel of the acquired images of the thread to detect the presence of an analyte. We demonstrate sensing of 50-1000 ppm of vapors of ammonia and hydrogen chloride, components commonly found in cleaning supplies, fertilizer, and the production of materials, as well as dissolved gas sensing of ammonia. The devices are shown to be stable over time and with agitation in a centrifuge. This is attributed to the unique dual step fabrication process that entraps the dye in a stable manner. The facile fabrication of colorimetric gas sensing washable threads is ideal for the next generation of smart textile and intelligent clothing.
提出了一种将光响应染料稳定包埋在纤维基底上的制造方法，以开发可集成到衣物中的检测系统。我们使用染料 5,10,15,20-四苯基-21H,23H-卟啉锰(III)氯化物（MnTPP）、甲酚红（MR）和溴百里酚蓝（BTB）进行概念验证。我们的光学方法利用智能手机提取并跟踪所获取纤维图像中红色（R）、绿色（G）和蓝色（B）通道的变化，以检测分析物的存在。我们证明了对常见于清洁用品、肥料和材料生产中的氨和氯化氢蒸气的 50-1000ppm 的蒸气以及溶解气体的氨的传感检测。这些设备在长时间内以及在离心机中的搅拌下显示出稳定性。这归因于独特的两步制造工艺，该工艺以稳定的方式将染料包埋起来。这种简便的比色气体传感可清洗纤维的制造方法非常适合下一代智能纺织品和智能服装。
