Electromechanically active as-electrospun polystyrene fiber mat: Significantly high quasistatic/dynamic electromechanical response and theoretical modeling
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Electromechanically active as-electrospun polystyrene fiber mat: Significantly high quasistatic/dynamic electromechanical response and theoretical modeling
Electromechanically active as-electrospun polystyrene fiber mat: Significantly high quasistatic/dynamic electromechanical response and theoretical modeling
3. Yuya Ishii, Yasmin Mohamed Yousry, Taiki Nobeshima, Iumsrivun Chonthicha, Heisuke Sakai, Sei Uemura, Seeram Ramakrishna, and Kui Yao, “Electromechanically active as-electrospun polystyrene fiber mat: Significantly high quasistatic/dynamic electromechanical response and theoretical modeling,” Macromolecular Rapid Communications, on-line at https://doi.org/10.1002/marc.202000218, 29 June 2020, Vol. 41, 2000218 (1 of 8). (Front Cover, Vol. 41, No. 14, 20 July 2020).
Abstract:
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 that of highly movable actuators like optical modulators without a substantial mechanical load.
License type:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding Info:
The authors from KIT and AIST gratefully acknowledge Mr. R. Kitayama and S. Kurihara for their assistance with the experiments. The authors from KIT thank the partial support from the Leading Initiative for Excellent Young Researchers (LEADER) of the Ministry of Education, Culture, Sports, Science and Technology of Japan, JSPS KAKENHI Grant Number 19K15421, and the Mazda Foundation. The authors from IMRE thank partial support from the National Research Foundation, Singapore, under its Competitive Research Program (NRF-CRP15-2015-04).
Description:
Article is open access: https://onlinelibrary.wiley.com/doi/abs/10.1002/marc.202070033