Flexible and lightweight pressure sensors have attracted tremendous attention as a promising component of wearable biological motion sensors and artificial electronic skins. Here, the electromechanical response of as‐electrospun fiber mats composed of a commodity polymer, atactic polystyrene, which can be applied in low‐cost/large‐area, flexible, and lightweight pressure sensors is demonstrated. The fiber mat demonstrates a significantly high apparent converse piezoelectric constant of >30 000 pm V⁻¹ under static measurement and ≈13 000 pm V⁻¹ even at a high frequency of 1 kHz. The first theoretical model to explain the unique electromechanical response is constructed, which reveals that the softness and moderate charge of the fiber mat are the reasons for the significantly high electromechanical response. Further, apparent piezoelectric constants obtained by direct measurement are lower than those obtained by the converse measurement, which is attributed to the densification and hardening of the fiber mat due to prepressure applied in direct measurement. These findings are likely to serve as a milestone for the development of large‐area, flexible, and lightweight pressure sensors at low cost, as well as highly movable actuators like optical modulators without a substantial mechanical load.

中文翻译：

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机电活性的电纺聚苯乙烯纤维毡：极高的准静态/动态机电响应和理论建模。

作为可穿戴生物运动传感器和人造电子皮肤的有希望的组成部分，灵活轻巧的压力传感器已引起了极大的关注。在此，演示了由商品聚合物无规立构聚苯乙烯组成的电纺纤维毡的机电响应，该毡可应用于低成本/大面积，柔性和轻型压力传感器。纤维毡在静态测量下表现出明显高的表观逆压电常数，大于30 000 pm V ^-1，≈13000 pm V ^-1即使在1 kHz的高频下也是如此。建立了第一个解释独特的机电响应的理论模型，该模型揭示了纤维毡的柔软性和适度的电荷是产生明显较高的机电响应的原因。此外，通过直接测量获得的表观压电常数低于通过相反测量获得的表观压电常数，这归因于由于在直接测量中施加的预压而导致纤维毡的致密化和硬化。这些发现可能将成为低成本开发大面积，灵活，轻便的压力传感器以及高度可移动的执行器（如光学调制器，而无大量机械负载）的里程碑。