表面修饰BaTiO_3对聚偏氟乙烯热性能和介电性能的影响规律研究
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摘要
高介电常数的高分子复合材料可以被广泛应用于能量存储和人工肌肉领域。利用含羧基聚芳醚腈(PEN)对BaTiO3(BT)纳米粒子进行表面修饰,以增加BT在高分子基体聚偏氟乙烯(PVDF)中的分散性。通过溶液浇铸法,制备了一系列BT@PEN含量不同的高分子复合薄膜(PVDF/BT@PEN)。结果表明:PVDF/BT@PEN具有很好的热稳定性,起始分解温度超过了440℃。同时,复合薄膜的介电常数k随着BT@PEN质量含量的增加逐渐增大。当BT@PEN质量含量为20%时,复合薄膜在100Hz时的介电常数大于12。
Polymer composites with high dielectric constant have broad application prospect in energy storage and artificial muscle.BaTiO3 was surface modified by poly(arylene ether nitrile)containing side carboxyl(BT@PEN)in order to improve its dispersity in PVDF.Then PVDF/BT@PEN nanocomposite films with different loading of BT@PEN nanoparticles were prepared by solution cast technique.The experimental results showed that PVDF/BT@PEN nanocomposites had very good thermal stability,and the initial decomposing temperature was over 440℃.The dielectric properties of PVDF/BT@PEN nanocomposites revealed that the dielectric constant gradually increased with the loading of BT@PEN.Especially,when the loading of BT@PEN reached to 20%,the dielectric constant could be higher than 12 at 100 Hz.
Polymer composites with high dielectric constant have broad application prospect in energy storage and artificial muscle.BaTiO3 was surface modified by poly(arylene ether nitrile)containing side carboxyl(BT@PEN)in order to improve its dispersity in PVDF.Then PVDF/BT@PEN nanocomposite films with different loading of BT@PEN nanoparticles were prepared by solution cast technique.The experimental results showed that PVDF/BT@PEN nanocomposites had very good thermal stability,and the initial decomposing temperature was over 440℃.The dielectric properties of PVDF/BT@PEN nanocomposites revealed that the dielectric constant gradually increased with the loading of BT@PEN.Especially,when the loading of BT@PEN reached to 20%,the dielectric constant could be higher than 12 at 100 Hz.
引文
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