Long Yu, Fan Wu, Jiarong Zhang, Ya’nan Zhao, Yi’na Yang, Tianran Zhao, Chunna Yu, Chang Zhao and Guangjian Xing*,
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引用次数: 0
Abstract
The conductive hydrogels used for fabricating flexible piezoresistive sensors encounter challenges related to diminished sensing performance due to limited mechanical properties. This study presents the development of a PAA/PEDOT:PSS/Nb2CTX hydrogel through a straightforward polymerization method. The hydrogel features a cross-linked dual network structure abundant in hydrogen bonds, which imparts exceptional mechanical properties, including stable stretchability, good compressibility, strong adhesion, superior self-healing capabilities, and antifreezing characteristics. With a high conductivity of 165.54 S m–1, the piezoresistive sensor based on this hydrogel demonstrates remarkable compressive sensing capabilities, including a low detection limit, a high sensitivity of 9.81, a rapid response/recovery time of merely 200 ms, a wide sensing range, and cyclic stability exceeding 2000 cycles. This sensor effectively detects a variety of human physiological activities, ranging from large joint movements to subtle finger bending and swallowing. Notably, the integration of Nb2CTX nanosheets, which possess photothermal conversion characteristics, allows the hydrogel to heat up quickly in response to near-infrared light, rendering it suitable for photothermal therapy. The combination of enhanced sensing performance and photothermal treatment potential in this sensor indicates promising applications in human health monitoring and adjunct therapy.
用于制造柔性压阻式传感器的导电水凝胶由于其有限的机械性能而面临传感性能下降的挑战。本研究采用直接聚合法制备了PAA/PEDOT:PSS/Nb2CTX水凝胶。该水凝胶具有丰富的氢键交联双网络结构,赋予其优异的机械性能,包括稳定的拉伸性、良好的压缩性、强附着力、优越的自愈能力和防冻特性。基于该水凝胶的压阻式传感器具有165.54 S m-1的高电导率,具有检测限低、灵敏度高达9.81、响应/恢复时间仅为200 ms、传感范围宽、循环稳定性超过2000次等显著的压缩传感能力。这种传感器有效地检测各种人体生理活动,从大的关节运动到细微的手指弯曲和吞咽。值得注意的是,具有光热转换特性的Nb2CTX纳米片的集成允许水凝胶在近红外光下快速升温,使其适合光热治疗。该传感器具有增强的传感性能和光热治疗潜力,在人体健康监测和辅助治疗方面具有广阔的应用前景。
期刊介绍:
ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.