材料科学
铁电聚合物
聚合物
压电
极化率
压电响应力显微镜
电致伸缩
铁电性
压电系数
偶极子
电介质
共聚物
凝聚态物理
极化(电化学)
复合材料
化学
物理化学
有机化学
物理
光电子学
分子
作者
Zhiwen Zhu,Guanchun Rui,Qiong Li,Elshad Allahyarov,Ruipeng Li,Thibaut Soulestin,Fabrice Domingues Dos Santos,Hezhi He,Philip L. Taylor,Lei Zhu
出处
期刊:Matter
[Elsevier]
日期:2021-11-01
卷期号:4 (11): 3696-3709
被引量:22
标识
DOI:10.1016/j.matt.2021.09.008
摘要
Summary
Piezoelectricity in ferroelectric polymers originates from the electrostrictive effect coupled with a remanent polarization. However, its structural origin remains controversial, and it is not clear how modifying the electrostriction can further improve piezoelectricity for polymers. Here, we report that electrostriction can be significantly enhanced in poled poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] random copolymers containing extended-chain primary crystals and relaxor-like secondary crystals in the oriented amorphous fraction (SCOAF). As a result of the high polarizability of dipoles and ferroelectric nanodomains in the SCOAF, the inverse piezoelectric coefficient d31 reaches as high as 77 ± 5 pm/V for the P(VDF-TrFE) 55/45 copolymer at 55°C. This finding not only extends our understanding of piezoelectricity in polymers but also provides guidance for further enhancing the piezoelectricity of ferroelectric polymers in the future.
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