Iumsrivun Chonthicha, Matsuda Kazuki, Ohkubo Shunsaku, Ishii Yuya
Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Kyoto 606-8585, Japan.
Polymers (Basel). 2022 Apr 29;14(9):1840. doi: 10.3390/polym14091840.
As-electrospun microfiber mats comprising atactic polystyrene (aPS), a low-cost commodity polymer, have demonstrated beneficial electromechanical properties. However, the variability of the electromechanical properties of fiber mats produced using different electrospinning conditions has not been investigated. Therefore, herein, the direct electromechanical properties of aPS fiber mats produced using different deposition times () and electrospinning voltages () are investigated. The resulting apparent piezoelectric constant () of the fiber mats demonstrates a specific peak value for as high as ~1600 pC N under 1-kPa pressure application after ~0.2-kPa pre-pressure application, although the of the fiber mats produced with some conditions is nearly zero pC·N. Furthermore, the peak position of with is fundamentally determined with /(-) [: effective surface charge density, (-): secant modulus of elasticity]. Charge distribution models for fiber mats with different are established. The models explain the characteristics of the significant changes in (-) and with . These findings provide significant directions for the production of fiber mats with improved direct electromechanical properties.
由无规聚苯乙烯（aPS，一种低成本商品聚合物）制成的静电纺微纤维垫已展现出有益的机电性能。然而，使用不同静电纺丝条件生产的纤维垫的机电性能变异性尚未得到研究。因此，本文研究了使用不同沉积时间（）和静电纺丝电压（）生产的aPS纤维垫的直接机电性能。在施加约0.2 kPa预压力后，在1 kPa压力作用下，纤维垫的表观压电常数（）显示出高达约1600 pC/N的特定峰值，尽管在某些条件下生产的纤维垫的几乎为零pC·N。此外，的峰值位置与基本上由/(-)决定[：有效表面电荷密度，(-)：割线弹性模量]。建立了不同的纤维垫的电荷分布模型。这些模型解释了(-)和随的显著变化特征。这些发现为生产具有改善的直接机电性能的纤维垫提供了重要方向。
