全膝关节置换术中能量采集与负荷监测的压电与摩擦电换能器在步态载荷下的性能

IF 16.8 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy Pub Date : 2025-05-11 DOI:10.1016/j.nanoen.2025.111117

Mahmood Chahari, Emre Salman, Milutin Stanacevic, Ryan Willing, Shahrzad Towfighian

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引用次数: 0

摘要

本研究探讨了压电纳米发电机（PENG）和摩擦电纳米发电机（TENG）在全膝关节置换术（TKR）中用于长期负荷监测的能量收集和传感能力。将多层聚偏氟乙烯（PVDF）薄膜和嵌入多巴胺包覆BaTiO3颗粒（SR/BT@PDA） TENG的长方体硅橡胶作为基于能量收集的负载传感器进行了比较。与先前依赖于简化谐波负荷的研究不同，这项工作利用生理学相关的步态周期，涵盖现实的力范围，以精确评估电输出、灵敏度和活动识别能力。结果表明，正向极化的TENG样品和向上极化的PVDF层产生的输出明显更高，这表明偶极子对准对提高传感器效率的重要性。收割机的输出表明，在正常行走条件下，SR/BT@PDA TENG在1.5GΩ处的最大视在功率输出为6µW，而PVDF在200MΩ处的最大视在功率输出为2.7µW。SR/BT@PDA TENG在能量收集方面优于PVDF，在26个步态循环中为10nF电容器达到140 V，并为60个led供电，而PVDF在近19个步态循环中将相同的电容器充电至33 V，为14个led供电。TENG的微长方体表面图案和嵌入压电材料（BaTiO3）的协同效应提高了其输出功率密度，而多层PVDF在不同负载条件下表现出可靠的性能。这两种传感器都能有效地检测各种活动，包括散步、慢跑和爬楼梯。总体而言，PVDF通过跟踪动态力分布提供精确的负载监测，而TENG在能量收集方面表现出色。本研究评估了将TENG和PENG集成到TKR中作为联合负荷监测的能量收集解决方案的潜力，而无需依赖外部电源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Performance of Piezoelectric and Triboelectric Transducers under Gait Loading for Energy Harvesting and Load Monitoring in Total Knee Replacements

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Performance of Piezoelectric and Triboelectric Transducers under Gait Loading for Energy Harvesting and Load Monitoring in Total Knee Replacements

This study investigates the energy harvesting and sensing capabilities of piezoelectric nanogenerators (PENG) and triboelectric nanogenerators (TENG) for long-term load monitoring in total knee replacement (TKR). Multi-layered polyvinylidene fluoride (PVDF) films and cuboid-patterned silicone rubber embedded with dopamine-coated BaTiO₃ particles (SR/BT@PDA) TENG are compared as energy harvesting-based load sensors. Unlike prior studies relying on simplified harmonic loading, this work utilizes physiologically relevant gait cycles covering realistic force ranges to precisely evaluate electrical output, sensitivity, and activity recognition capabilities. Results indicate forward-polarized TENG samples and upward-polarized PVDF layers generate significantly higher outputs, indicating the importance of dipole alignment for enhanced sensor efficiency. The harvesters’ outputs show that the SR/BT@PDA TENG achieves a maximum apparent power output of 6 µW at 1.5GΩ, while the PVDF reaches 2.7 µW at 200MΩ under normal walking conditions. The SR/BT@PDA TENG outperforms PVDF in energy harvesting, reaching 140 V in 26 gait cycles for a 10nF capacitor and powering 60 LEDs, while PVDF charges the same capacitor to 33 V in nearly 19 gait cycles, powering 14 LEDs. The TENG’s micro-cuboid surface patterning and synergistic effects of embedded piezoelectric material (BaTiO₃) enhance its output power density, whereas the multi-layered PVDF demonstrates reliable performance under diverse load conditions. Both sensors effectively detect diverse activities, including walking, jogging, and stair climbing. Overall, PVDF provides precise load monitoring by tracking dynamic force profiles, while TENG outperforms in energy harvesting. This study evaluates the potential of integrating TENG and PENG into TKR as energy-harvesting solutions for joint load monitoring without relying on external power sources.

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来源期刊

Nano Energy CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

30.30

自引率

7.40%

发文量

1207

审稿时长

23 days

期刊介绍： Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem. Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.