Determining the pH of sweat provides valuable information for athletes and patient monitoring. This work presents a textile-based, highly sensitive pH sensor for pH determination. Three conductive fabrics (Argenmesh, Ristop silver and stainless steel mesh (SSM)) were modified with a pH sensitive electrodeposited iridium oxide film (EIROF). The three electrodeposited fabrics were characterized by impedance measurements. The stainless steel mesh showed the best sensitivity to pH changes and therefore was selected for further experiments. Two configurations of this fabric were evaluated, looking for improvement in pH sensitivity and temperature dependence. The best result was obtained with the configuration that maximizes the contact surface between the stainless steel fibers, showing an error of 0.15% in the pH measurement of a buffer solution. This configuration was also used to perform in vivo measurements, obtaining an error of 4% when compared to the measurements performed with a commercial pH test strip. The implementation of sensor into textiles brings some advantages such as comfort, biocompatibility and washability, among others; making the future incorporation of a sensor into a garment very possible.

测定汗液的pH值可为运动员和患者监测提供有价值的信息。这项工作提出了一种用于确定pH值的基于纺织品的高灵敏度pH传感器。用pH敏感的电沉积氧化铱膜（EIROF）修饰了三种导电织物（Argenmesh，Ristop银和不锈钢网（SSM））。通过阻抗测量来表征三种电沉积织物。不锈钢网对pH值的变化表现出最好的敏感性，因此被选择用于进一步的实验。对这种织物的两种构造进行了评估，以寻求改善pH敏感性和温度依赖性。通过使不锈钢纤维之间的接触表面最大化的配置，可以获得最佳结果，在缓冲溶液的pH测量中显示出0.15％的误差。此配置还用于执行体内测量，与使用商业pH试纸条进行的测量相比，误差为4％。传感器在纺织品中的应用带来了一些优势，例如舒适性，生物相容性和可洗性。使将来将传感器整合到服装中成为可能。