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Highly-ordered assembly sheath layers of graphene coaxial fibers for high-performance wearable devices
Sensors and Actuators A: Physical ( IF 4.6 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.sna.2020.111840
Ping Li , Wen Wu , Jia Xu , Jianda Cao , Huanxia Zhang

Graphene fibers (GF) have broad application prospects in the fields of supercapacitors, electrodes, stimuli response sensors, and smart wearables. However, previously reported graphene-based fibers generally have low toughness and poor stretchability, which may limit possible applications. Here, we prepared novel high-strength, -stretch, and -conductivity graphene fibers with dense and highly-ordered sheath layers and a porous core structure. This was prepared by an efficient one-step coaxial wet-spinning method, which forms the rapid traction of the core layers on the sheath layers by the speed difference of the former, which is faster than the latter. The fiber surface was also subjected to the scouring force of the coagulation bath when the spinning solution was sprayed out of the spinning hole. The tug-of-war effect of these two opposing forces reacts on the curved graphene sheets, which made the graphene layers gradually straighten out, so that the sheath is efficiently and orderly aligned. The elongation of the high-strength GF with a core-sheath structure was effectively improved by approximately double, which was much higher than the previous research results. Moreover, high strength was maintained, and electrical stability was observably increased due to the core-sheath structure of the fibers. Such fibers also exhibited very stable electrical resistance during radial compression and tension cycles. Furthermore, we demonstrated the application of the fibers in wearable flexible devices.



中文翻译:

高性能可穿戴设备用石墨烯同轴纤维的有序组装护套层

石墨烯纤维(GF)在超级电容器,电极,刺激响应传感器和智能可穿戴设备领域具有广阔的应用前景。然而,先前报道的基于石墨烯的纤维通常具有低的韧性和差的拉伸性,这可能限制了可能的应用。在这里,我们制备了新颖的高强度,高拉伸,高导电率的石墨烯纤维,具有密集且有序的皮层和多孔的芯结构。这是通过一种有效的单步同轴湿纺方法制备的,该方法通过前者的速度差形成皮层上芯层的快速牵引力,前者的速度差比后者快。当将纺丝溶液从纺丝孔中喷出时,纤维表面也经受凝结浴的擦洗力。这两个相反的力的拔河效应在弯曲的石墨烯片上发生反应,使石墨烯层逐渐变直,从而使护套高效,有序地对齐。具有芯鞘结构的高强度GF的伸长率有效地提高了约一倍,这比以前的研究结果要高得多。此外,由于纤维的芯鞘结构,因此保持了高强度,并且可观察到电稳定性的提高。这样的纤维在径向压缩和拉伸循环期间也表现出非常稳定的电阻。此外,我们展示了纤维在可穿戴柔性设备中的应用。从而使护套高效,有序地对齐。具有芯鞘结构的高强度GF的伸长率有效地提高了约一倍,这比以前的研究结果要高得多。此外,由于纤维的芯鞘结构,因此保持了高强度,并且可观察到电稳定性的提高。这样的纤维在径向压缩和拉伸循环期间也表现出非常稳定的电阻。此外,我们展示了纤维在可穿戴柔性设备中的应用。从而使护套高效,有序地对齐。具有芯鞘结构的高强度GF的伸长率有效地提高了约一倍,这比以前的研究结果要高得多。此外,由于纤维的芯鞘结构,因此保持了高强度,并且可观察到电稳定性的提高。这样的纤维在径向压缩和拉伸循环期间也表现出非常稳定的电阻。此外,我们展示了纤维在可穿戴柔性设备中的应用。由于纤维的芯鞘结构,电稳定性明显提高。这样的纤维在径向压缩和拉伸循环期间也表现出非常稳定的电阻。此外,我们展示了纤维在可穿戴柔性设备中的应用。由于纤维的芯鞘结构,电稳定性明显提高。这样的纤维在径向压缩和拉伸循环期间也表现出非常稳定的电阻。此外,我们展示了纤维在可穿戴柔性设备中的应用。

更新日期:2020-01-13
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