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Coaxial mechano-electrospinning of oriented fibers with core-shell structure for tactile sensing
Polymers for Advanced Technologies ( IF 3.4 ) Pub Date : 2022-11-20 , DOI: 10.1002/pat.5933
Ping Yu, Jiake Zhang, Jiangqi Long

Coaxial electrospinning is an effective technique to produce core-shell fibers. Nevertheless, it is unable to realize accurate positioning of the fibers in two dimensions which limits its use in the field of high oriented and aligned structures over large area such as flexible tactile sensors. Here, we introduce the Mechano-electrospinning, in which drawing force coming from moving substrate and electric static force are used to manipulate the fiber controllable into the traditional coaxial electrospinning to form a new method named coaxial Mechano-electrospinning which can continuously direct-write oriented core-shell fiber with high deposition accuracy. This method uses a coaxial convex needle and a two dimensional moving collector to deposit core-shell fibers by near-field localization and mechanical drawing force. A series of experiments were performed to determine optimum process parameters and results showed that with the substrate moving speed of 50–200 mm/s, voltage of 5–6.5 kV and the tip-collector distance of 20–50 mm, core-shell fibers can be continuously deposited and well oriented. Additionally, a pressure sensor based on the core-shell fibers was developed and exhibited good dynamic sensitivity in the range of 0.5–50 Hz.

中文翻译:

具有核壳结构的定向纤维的同轴机械静电纺丝用于触觉传感

同轴静电纺丝是生产核壳纤维的有效技术。然而,它无法实现纤维在二维上的精确定位,这限制了它在大面积高定向和对齐结构领域的应用,例如柔性触觉传感器。在这里,我们介绍了机械静电纺丝,其中利用来自移动基底的牵引力和静电力来操纵纤维可控地进入传统的同轴静电纺丝,形成一种称为同轴机械静电纺丝的新方法,可以连续直写定向具有高沉积精度的核壳纤维。该方法使用同轴凸针和二维移动收集器通过近场定位和机械拉力沉积核壳纤维。进行了一系列实验以确定最佳工艺参数,结果表明,在基板移动速度为 50-200 mm/s、电压为 5-6.5 kV 和尖端-收集器距离为 20-50 mm 的情况下,核-壳纤维可连续沉积,定向性好。此外,还开发了一种基于核壳纤维的压力传感器,并在 0.5-50 Hz 范围内表现出良好的动态灵敏度。
更新日期:2022-11-20
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