红外与毫米波学报, 2013, 32 (1): 18, 网络出版: 2013-03-25  

P(VDF-TrFE)/Ag复合薄膜的铁电以及介电性能研究

The ferroelectric and dielectric properties of poly (vinylidenefluoride-trifluoroethylene) copolymer /Ag composite films
作者单位
1 中科院上海技术物理研究所 红外物理国家重点实验室, 上海 200083
2 上海师范大学, 上海 200233
摘要
利用旋涂法制备并采用氢气退火处理得到P(VDF-TrFE)/Ag复合薄膜, 在XRD图像上可以观察到在2θ=38.1°的Ag(111)相的衍射峰, 同样在SEM图像上观察到银纳米粒子的存在.在薄膜的红外透射光谱上可以观察到β相特征峰的蓝移, 这可归结为银纳米粒子与偶极子的相互作用.银纳米粒子的掺杂增强了薄膜的铁电和介电性能.与传统退火方式处理的纯P(VDF-TrFE)薄膜相比, 纳米银掺杂比例为10%的P(VDF-TrFE)/Ag复合薄膜的铁电剩余极化强度和介电常数分别提高了32.5%和13.3%.介电损耗不随纳米银掺杂比例的增加而变化的现象不符合渗流理论.
Abstract
The poly(vinylidenefluoride-trifluoroethylene)/Ag composite films are derived by spin-coating and annealed at hydrogen atmosphere. Ag(111) phase labeled at the diffraction peak 2θ=38.1 is observed from X-ray diffraction (XRD) pattern, and it was also proved from scanning electron microscope (SEM) images. A blue shift was observed in the infrared transmission spectrum of the composite films, which suggests the interaction of dipole and silver nanoparticles. The ferroelectric polarization and dielectric constant of P(VDF-TrFE)/Ag composite thin films increase by 32.5% and 13.3%, respectively, compared with the pure polymer films under air annealing. The dielectric loss tangent of the P(VDF-TrFE)/Ag composite films is independent of Ag doping ratios, which violates the percolation theory.

阮亚飞, 江林, 王建禄, 孙璟兰, 刘爱云, 孟祥建. P(VDF-TrFE)/Ag复合薄膜的铁电以及介电性能研究[J]. 红外与毫米波学报, 2013, 32(1): 18. RUAN Ya-Fei, JIANG Lin, WANG Jian-Lu, SUN Jing-Lan, LIU Ai-Yun, MENG Xiang-Jian. The ferroelectric and dielectric properties of poly (vinylidenefluoride-trifluoroethylene) copolymer /Ag composite films[J]. Journal of Infrared and Millimeter Waves, 2013, 32(1): 18.

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