Wearable and portable electronic devices based on textile structure have been widely used owing to their wearability and comfortableness. However, yarn fineness and the comfort of the fabric cannot satisfy the requirements of smart wearable devices. This work presents a novel strategy to prepare highly integrated PVDF/conductive nylon core-sheath structure piezoelectric yarns for wearable which is fabricated by combining electrospinning strategy with 2D braiding technology. The fineness of single yarns as well as strength are both improved significantly compared to previous works. The piezoelectric outputs of the yarn are still stable after 800 s fatigue test at a frequency of 4 Hz, and the cycle stability can maintain more than 3200 cycles. Furthermore, the piezoelectric yarns are further woven into piezoelectric plain fabric. According to the electrical performance, the length of the piezoelectric yarn and the thickness of the piezoelectric layer would both affect the output electrical performance. The yarn of the 10 cm in length and 600 μm in fineness can produce an output voltage of 120 mV. Meanwhile, Both the piezoelectric yarn and the fabric could generate piezoelectric output signals through human movement, such as bending, walking. Therefore, the electrical and mechanical performance of the piezoelectric yarns prepared in our work could be improved significantly, and the comfortableness and durability performance of the piezoelectric fabric can satisfy most wearing requirements, which would provide some help in the field of piezoelectric wearable devices based on yarns and fabrics.

Graphical Abstract

中文翻译：

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一种为可穿戴能量收集器制造芯鞘结构压电纱线的新策略

基于纺织结构的可穿戴和便携式电子设备因其可穿戴性和舒适性而得到广泛应用。然而，纱线的细度和面料的舒适度并不能满足智能穿戴设备的要求。这项工作提出了一种新的策略来制备高集成 PVDF/导电尼龙芯鞘结构的可穿戴压电纱线，该纱线是通过结合静电纺丝策略和二维编织技术制造的。与以往的作品相比，单纱的细度和强度均有显着提高。纱线压电输出在4Hz频率下经过800s疲劳试验后仍保持稳定，循环稳定性可保持3200次以上。此外，压电纱线进一步编织成压电平纹织物。根据电气性能，压电纱线的长度和压电层的厚度都会影响输出电气性能。长10厘米、细度600微米的纱线可产生120毫伏的输出电压。同时，压电纱线和织物都可以通过人体运动，如弯曲、行走等产生压电输出信号。因此，我们的工作制备的压电纱线的电气和机械性能可以得到显着提高，压电织物的舒适性和耐久性能满足大多数佩戴要求，这将为基于压电可穿戴设备领域的研究提供一些帮助。纱线和织物。压电纱线的长度和压电层的厚度都会影响输出电气性能。长10厘米、细度600微米的纱线可产生120毫伏的输出电压。同时，压电纱线和织物都可以通过人体运动，如弯曲、行走等产生压电输出信号。因此，我们的工作制备的压电纱线的电气和机械性能可以得到显着提高，压电织物的舒适性和耐用性可以满足大多数佩戴要求，这将为基于压电可穿戴设备领域的研究提供一些帮助。纱线和织物。压电纱线的长度和压电层的厚度都会影响输出电气性能。长10厘米、细度600微米的纱线可产生120毫伏的输出电压。同时，压电纱线和织物都可以通过人体运动，如弯曲、行走等产生压电输出信号。因此，我们的工作制备的压电纱线的电气和机械性能可以得到显着提高，压电织物的舒适性和耐久性能满足大多数佩戴要求，这将为基于压电可穿戴设备领域的研究提供一些帮助。纱线和织物。长度为10厘米，细度为600微米的纱线可产生120毫伏的输出电压。同时，压电纱线和织物都可以通过人体运动，如弯曲、行走等产生压电输出信号。因此，我们的工作制备的压电纱线的电气和机械性能可以得到显着提高，压电织物的舒适性和耐久性能满足大多数佩戴要求，这将为基于压电可穿戴设备领域的研究提供一些帮助。纱线和织物。长度为10厘米，细度为600微米的纱线可产生120毫伏的输出电压。同时，压电纱线和织物都可以通过人体运动，如弯曲、行走等产生压电输出信号。因此，我们的工作制备的压电纱线的电气和机械性能可以得到显着提高，压电织物的舒适性和耐久性能满足大多数佩戴要求，这将为基于压电可穿戴设备领域的研究提供一些帮助。纱线和织物。

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