Discovering giant magnetoelasticity in soft matter for electronic textiles.
Discovering giant magnetoelasticity in soft matter for electronic textiles.
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DOI：
10.1016/j.matt.2021.09.012
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发表时间：
2021-11
期刊：
影响因子：
18.9
通讯作者：
Chen, Jun
中科院分区：
文献类型：
--
作者：
Chen, Guorui;Zhao, Xun;Andalib, Sahar;Xu, Jing;Zhou, Yihao;Tat, Trinny;Lin, Ke;Chen, Jun
我们发现了一个巨大的磁弹性在软物质的磁力耦合因子相比，没有外部施加磁场的刚性金属合金的增强高达5倍。建立了基于磁偶极-偶极相互作用和退磁场的波浪链解析模型，与实验结果吻合较好。为了探索其在电子纺织品中的潜力，我们将其与磁感应耦合，发明了纺织磁弹性发电机（MEG），这是一种用于生物力学能量转换的新工作机制，具有内在防水性，超低内阻抗约20 Ω，高短路电流密度1.37 mA/cm 2，这比其它纺织品发生器的对应物高大约四个数量级。同时，在机器学习的辅助下，纺织MEG可以在没有任何封装的情况下连续监测大量出汗皮肤上的呼吸活动，从而可以以自供电的方式及时诊断呼吸异常。我们预计这一发现可以扩展到广泛的软物质系统，成为开发用于能源、传感和治疗应用的电子纺织品的一种引人注目的方法。我们发现了一个巨大的磁弹性在软物质的磁力耦合因子相比，没有外部施加磁场的刚性金属合金的增强高达5倍。这一发现很好地解释了波浪链分析模型。为了探索其在电子纺织品中的潜力，我们将其与磁感应结合起来，发明了纺织磁弹性发电机（MEG），这是一种全新的生物力学能量转换工作机制，具有低电流输出，超低内部阻抗和内在防水性。
We discovered a giant magnetoelasticity in soft matter with up to 5-fold enhancement of magnetomechanical coupling factors compared to that of rigid metal alloys without an externally applied magnetic field. A wavy chain analytical model based on the magnetic dipole-dipole interaction and demagnetizing field was established, fitting well to the experimental observation. To explore its potentials in electronic textiles, we coupled it with magnetic induction to invent a textile magnetoelastic generator (MEG), a new working mechanism for biomechanical energy conversion, featuring an intrinsic waterproofness, an ultralow internal impedance of approximately 20 Ω, and a high short-circuit current density of 1.37 mA/cm2, which is about four orders of magnitude higher than that of other textile generator counterparts. Meanwhile, assisted by machine learning, the textile MEG could continuously monitor the respiratory activities on heavily perspiring skin without any encapsulation, allowing a timely diagnosis of the respiration abnormalities in a self-powered manner. We foresee that this discovery can be extended to wide-range soft-matter systems, emerging as a compelling approach to develop electronic textiles for energy, sensing, and therapeutic applications. We discovered a giant magnetoelasticity in soft matter with up to 5-fold enhancement of magnetomechanical coupling factors compared to that of rigid metal alloys without an externally applied magnetic field. This discovery was well explained by a wavy chain analytical model. To explore its potentials in electronic textiles, we coupled it with magnetic induction to invent a textile magnetoelastic generator (MEG), a fundamentally new working mechanism for biomechanical energy conversion, featuring ultrahigh current output, ultralow internal impedance, and intrinsic waterproofness.
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