Indarit Naraporn, Kim Yong-Hoon, Petchsang Nattasamon, Jaisutti Rawat
Department of Physics, Faculty of Science and Technology, Thammasat University Pathumthani 12121 Thailand
School of Advanced Materials Science and Engineering, Sungkyunkwan University Suwon 440746 Korea.
RSC Adv. 2019 Aug 27;9(46):26773-26779. doi: 10.1039/c9ra04005f. eCollection 2019 Aug 23.
A single-yarn-based gas sensor has been made from conductive polyaniline coated on commercial yarns. This can detect ammonia gas concentration in an environment or a working area. Cotton, rayon and polyester are utilized as substrates using a dip-coating process. The conductive yarns show ohmic behavior with an electrical resistance of 15-31 kΩ cm. The conductive polyester yarn exhibits higher mechanical strength even after intensive chemical treatment. It also has the highest gas response of 57% of 50 ppm ammonia gas, the concentration at which health problems will occur. A linear gas response of the yarn sensor appears in a range of 5-25 ppm ammonia concentration. The polyester yarn sensor can be reused without any change in its sensing response. It can monitor gas levels continuously giving real-time results. By using a microcontroller as part of the circuitry, the gas detection results are transferred and updated wirelessly to a computer or to a smartphone. The textile-based gas sensor can be sewn directly onto the fabrics since it is made with the same fabric. This single-yarn-based gas sensor is suitable for mass production and is appropriate for sophisticated applications.
一种基于单纱的气体传感器由涂覆在商业纱线上的导电聚苯胺制成。它可以检测环境或工作区域中的氨气浓度。使用浸涂工艺将棉、人造丝和聚酯用作基底。导电纱线呈现欧姆行为，电阻为15 - 31 kΩ·cm。即使经过强化化学处理，导电聚酯纱线仍具有较高的机械强度。它对50 ppm氨气（会引发健康问题的浓度）的气体响应最高，为57%。纱线传感器在5 - 25 ppm氨气浓度范围内呈现线性气体响应。聚酯纱线传感器可以重复使用，其传感响应不会有任何变化。它可以持续监测气体水平并给出实时结果。通过将微控制器作为电路的一部分，气体检测结果可以无线传输并更新到计算机或智能手机上。这种基于纺织品的气体传感器由于是用相同的织物制成的，所以可以直接缝在织物上。这种基于单纱的气体传感器适合大规模生产，适用于复杂的应用。
