Improving ferro- and piezo- electric properties of hydrogenized poly(vinylidene fluoride-trifluoroethylene) films by annealing at elevated temperatures

被引:21
|
作者
Wang, Jian [1 ]
Li, Zhong [1 ,2 ]
Yan, Yuan [3 ]
Wang, Xiao [1 ]
Xie, Yun-chuan [1 ]
Zhang, Zhi-cheng [1 ]
机构
[1] Xi An Jiao Tong Univ, Sch Sci, Dept Appl Chem, MOE Key Lab Nonequilibrium Synth & Modulat Conden, Xian 710049, Peoples R China
[2] Xian Univ Sci & Technol, Coll Mat Sci & Engn, Xian 710054, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China
基金
对外科技合作项目(国际科技项目); 中国国家自然科学基金;
关键词
P(VDF-TrFE); P(VDF-CTFE); Hydrogenation; Annealing; Electrical properties; VINYLIDENE FLUORIDE; DIELECTRIC-PROPERTIES; TRANSITION BEHAVIOR; PHASE-TRANSITION; COPOLYMERS; TRIFLUOROETHYLENE; PIEZOELECTRICITY; HYDROGENATION; POLYMER;
D O I
10.1007/s10118-016-1782-8
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
After annealing the solution cast P(VDF-TrFE) films at elevated temperatures, which were synthesized via a full hydrogenation process from P(VDF-CTFE) with a composition of VDF/TrFE = 80/20 (mol%), a series of P(VDF-TrFE) films were fabricated in present work. The crystalline and ferroelectric phases of the films were carefully characterized and their dielectric, ferroelectric and piezoelectric properties were systematically investigated. The improved crystalline and ferroelectric phases in the films induced by annealing at elevated temperatures are responsible for the significant improved electric properties of the films. The optimized annealing temperature is found to be 130 A degrees C and the best performance including the highest dielectric constant of 12.5 at 1 kHz, the largest maximum polarization of 11.21 mu C/cm(2) and remnant polarization of 7.22 mu C/cm(2), the lowest coercive electric field of 56 MV/m, and the highest piezoelectric coefficient of -25 pC/N is observed.
引用
收藏
页码:649 / 658
页数:10
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