P(VDF-TrFE)/Ag复合薄膜的铁电以及介电性能研究

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.

参考文献

[1] SCOTT J F, ARAUJO C A. Ferroelectric Memories[J].Science, 1989, 246(4936):1400-1405.

[2] HUANG C, Klein R, XIA F, et al. Poly(vinylidene fluoride-trifluoroethylene) based High Performance Electroactive Polymers[J].IEEE Transactions on Dielectrics and Electrical Insulation, 2004, 11(2):299-311.

[3] NALWA H S, MARCEL D.Ferroelectric Polymers: Chemistry, Physics, and Applications(M).New York: Inc., 1995.

[4] TAJITSU Y, CHIBA A, FURUKAWA T, et al.Crystalline phase transition in the copolymer of vinylidenefluoride and trifluoroethylene[J].Appl.Phys.Lett., 1980, 36(4):286-288.

[5] LIU A Y, MENG X J, XUE J Q, et al. Electrical and optical properties of Pb(Mg1/3Nb2/3)O3–PbTiO3 thin films prepared by chemical solution deposition[J]. Appl. Phys. Lett, 2005, 87(7):072903.

[6] STRUEMPLER R, REICHENBACH J G.Conducting Polymer Composites[J]. J. Electroceramic, 1999, 3(4):329(1999).

[7] KO E H, SUH J.Artificial Metalloproteases with Broad Substrate Selectivity Constructed on Polystyrene[J]. Bull. Korean Chem. Soc., 2004, 25(12):1917-1923.

[8] YE Y and JIANG Y D.Fabrication of polymeric PVDF/PDDA ultrathin films on quartz crystal microbalance[J].Materials Science and Engineering B, 2006, 132(3): 278-282.

[9] BOCCACCIO T, BOTTINO A.Characterization of PVDF membranes by vibrational spectroscopy[J], Journal of Membrane Science, 2002, 210(2):315-329.

[10] GREGORIO R, CAPITAO R C.Morphology and phase transition of high melt temperature crystallized poly(vinylidene fluoride) [J].Journal of Materials Science, 2000, 35(2):299-306.

[11] SUN L L, LI B, ZHAO Y, et al. Structure-induced high dielectric constant and low loss of CNF/PVDF composites with heterogeneous CNF distribution[J].Nanotechnology, 2010, 21(30): 305702.

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.

P(VDF-TrFE)/Ag复合薄膜的铁电以及介电性能研究

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