材料科学
制作
薄膜
结晶度
铁电性
电活性聚合物
聚合物
压电
氟化物
复合材料
相(物质)
乙烯醇
化学工程
纳米技术
光电子学
有机化学
化学
电介质
病理
无机化学
替代医学
工程类
医学
作者
Hui Wang,Qiusong Chen,Wei Xia,Xunlin Qiu,Qian Cheng,Guodong Zhu
摘要
ABSTRACT Ferroelectric polymers have obtained much attention in low cost and flexible electronics. As one representative ferroelectric polymer, poly(vinylidene fluoride) (PVDF) has been comprehensively studied. Due to its complicated phase composition, fabrication of electroactive phases has been an open question especially for PVDF thin films deposited on solid substrates. Here cooperative stretching process is introduced for the fabrication of electroactive PVDF thin films. PVDF thin films are coated on stretchable poly(vinyl alcohol) substrates and mechanically stretched under optimized stretching parameters. Structural, spectral, and electrical measurements indicate that cooperative stretching process can effectively convert the nonpolar α phase to the electroactive β and γ phases companied by an enhancement of film crystallinity. Stretched PVDF films present a reverse piezoelectric coefficient of −37 pm/V, comparable with the results from films fabricated by the other techniques. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46324.
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