Wang Qiuning, Peng Yuan, Guo Bin, Sun Jianhai, Liu Yaxia, Wang Yanjun, Zhang Hongyan
Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, Beijing Institute of Fashion Technology Beijing 100029 P. R. China
Zhongshan Institute of Changchun University of Science and Technology P. R. China.
RSC Adv. 2024 Dec 5;14(52):38530-38538. doi: 10.1039/d4ra06915c. eCollection 2024 Dec 3.
A sensitive compound was successfully obtained by coating polyaniline (PANI) on the surface of composite nanoparticles consisting of Au-loaded tin dioxide, named as PANI-Au-SnO, using an polymerization method. NH sensors in thin-film and fiber-shaped forms were prepared by inkjet printing and impregnation methods, respectively, based on PANI-Au-SnO. The response characteristics of these NH sensors developed from composite sensitive materials were investigated in detail. Results indicate an effective response of the sensors to NH at room temperature. The thin-film sensor demonstrated a good linear relationship between the resistance change and NH concentration within the range of 5-40 ppm, indicating its excellent repeatability and long-term stability. In comparison to the thin film sensor, the fiber-shaped sensor showed a consistently stable response to NH even after 1000 cycles of repeated bending deformation. To demonstrate the practical application of the flexible fiber-shaped NH sensor, a cap designed for NH detection was fabricated by integrating the as-prepared sensor with a circuit board and an LED digital display. This assembly was incorporated into a commercially available ducktail cap, resulting in a wearable device capable of dynamically monitoring environmental NH levels and displaying real-time values. This innovative application underscores the potential of these sensors in real-world scenarios, particularly in occupational safety, where workers might be exposed to harmful levels of NH. The cap could serve as a personal safety device, alerting the wearer to hazardous concentrations of NH, which is particularly relevant in industrial or agricultural settings.
通过采用聚合方法，在负载金的二氧化锡组成的复合纳米颗粒表面包覆聚苯胺（PANI），成功获得了一种敏感化合物，命名为PANI-Au-SnO。基于PANI-Au-SnO，分别通过喷墨打印和浸渍方法制备了薄膜型和纤维状的NH传感器。详细研究了由复合敏感材料制成的这些NH传感器的响应特性。结果表明，这些传感器在室温下对NH有有效的响应。薄膜传感器在5-40 ppm范围内的电阻变化与NH浓度之间呈现出良好的线性关系，表明其具有出色的重复性和长期稳定性。与薄膜传感器相比，即使经过1000次反复弯曲变形循环后，纤维状传感器对NH仍表现出持续稳定的响应。为了展示柔性纤维状NH传感器的实际应用，通过将制备好的传感器与电路板和LED数字显示器集成，制造了一个用于NH检测的帽子。该组件被整合到一个市售的鸭舌帽中，形成了一个能够动态监测环境NH水平并显示实时值的可穿戴设备。这种创新应用突出了这些传感器在实际场景中的潜力，特别是在职业安全方面，工人可能会接触到有害水平的NH。该帽子可以作为个人安全设备，提醒佩戴者注意NH的危险浓度，这在工业或农业环境中尤为重要。
