Ge Wenna, Wei Quanmao, Wang Xu, Lu Chenguang, Han Hu, Liu Yahua
State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology Dalian 116024 P. R. China
School of Mechanical & Vehicle Engineering, Linyi University Linyi Shandong 276000 P. R. China
RSC Adv. 2025 Jan 27;15(4):2651-2656. doi: 10.1039/d4ra08459d. eCollection 2025 Jan 23.
The ability to convert moisture signals into electrical signals through contactless control underpins a wide range of applications, including health monitoring, disaster warning, and energy harvesting. Despite its potential, the effective utilization of low-grade energy remains challenging, as it often requires complex device architectures that limit scalability and integration, particularly in wearable technologies. Here, we present a soft, flexible moisture-electric converter made from cellulose nanocrystals and polyvinyl alcohol composite films, designed for a novel touchless interactive platform. The device autonomously generates an electric output voltage of 200-700 mV in response to ambient moisture variations without requiring an external energy source. Its design, featuring a soft-adhered conductive carbon strip coupled with the composite film, provides high flexibility and portability. This configuration facilitates the creation of a non-contact control interface that seamlessly interacts with biological moisture from the human body, demonstrated by a mask that detects breathing conditions and a panel that measures contact distance. These advancements offer a promising pathway for developing flexible, intelligent electronic devices for wearable and touchless technologies.
通过非接触式控制将湿度信号转换为电信号的能力支撑着广泛的应用，包括健康监测、灾害预警和能量收集。尽管具有潜力，但低品位能源的有效利用仍然具有挑战性，因为它通常需要复杂的器件架构，这限制了可扩展性和集成性，特别是在可穿戴技术中。在此，我们展示了一种由纤维素纳米晶体和聚乙烯醇复合膜制成的柔软、灵活的湿度-电转换器，专为新型非接触式交互平台设计。该器件在无需外部能源的情况下，响应环境湿度变化自主产生200 - 700 mV的输出电压。其设计采用与复合膜耦合的软粘附导电碳带，具有高柔韧性和便携性。这种配置便于创建一个非接触式控制界面，该界面能与来自人体的生物湿度无缝交互，通过检测呼吸状况的面罩和测量接触距离的面板得以证明。这些进展为开发用于可穿戴和非接触式技术的灵活、智能电子设备提供了一条有前景的途径。
