TPU/MOFs Electrospun Composite Film for Underwater Tactile Sensing and Finger Joint Bending Monitoring

IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2025-10-09 DOI:10.1002/smll.202510062
Quanyu Wang, Zichao Wang, Wenshuai Tian, Zhiqian Li, Pu Liu, Zonglin Pan, Yongxin Song, Dongqing Li
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引用次数: 0

Abstract

Most flexible tactile pressure sensors can hardly be used in deep sea due to the strict water sealing requirement on the soft material and the hardening effect due to high hydroSstatic pressure. To address these issues, a self‐powered and hydrostatic pressure‐balanced underwater flexible tactile sensor based on an electrospun nanofiber film composed of a thermoplastic polyurethane elastomer (TPU) and Metal Organic Frameworks (MOFs‐801) is presentedr. The sensor generates ionic current via different ion movement speeds under pressure, and can simultaneously achieve pressure and position sensing. Experimental results show the signal magnitude increases with the increase in the applied pressure, carboxyl group concentration, and stretching length. The direction and magnitude of the signal depend on the pressing or stretching position of the film, with bigger current magnitude closer to the film ends. The maximum sensitivity is 1.31 kPa−1, with the response and recovery times of 0.16 and 0.51 s, respectively. The sensor remains operational after over 1400 cycles under 600 kPa external load. Furthermore, the signal magnitude decreased only by 10.38% under 100 m water depth. Proof of concept demonstration of object shape differentiation by monitoring the bending of finger joints is successfully achieved.
TPU/MOFs静电纺复合膜水下触觉传感及手指关节弯曲监测
大多数柔性触觉压力传感器由于对软质材料的严格水封要求和高静水压力造成的硬化效应而难以在深海中应用。为了解决这些问题,提出了一种基于由热塑性聚氨酯弹性体(TPU)和金属有机框架(mof - 801)组成的电纺纳米纤维薄膜的自供电和静水压力平衡水下柔性触觉传感器。该传感器在压力下通过不同的离子运动速度产生离子电流,并可同时实现压力和位置感应。实验结果表明,信号强度随施加压力、羧基浓度和拉伸长度的增加而增加。信号的方向和大小取决于薄膜的按压或拉伸位置,靠近薄膜末端的电流大小越大。最大灵敏度为1.31 kPa−1,响应时间为0.16 s,恢复时间为0.51 s。在600千帕的外部负载下,传感器在1400多次循环后仍能正常工作。在100 m水深下,信号强度仅下降了10.38%。成功实现了通过监测手指关节的弯曲来区分物体形状的概念验证演示。
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来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
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