Thakur Pradip, Kool Arpan, Bagchi Biswajoy, Hoque Nur Amin, Das Sukhen, Nandy Papiya
Department of Physics, Jadavpur University, Kolkata-700032, India.
Phys Chem Chem Phys. 2015 May 21;17(19):13082-91. doi: 10.1039/c5cp01207d.
A facile and low cost synthesis of Ni(OH)2 nanobelt (NB) modified electroactive poly(vinylidene fluoride) (PVDF) thin films with excellent dielectric properties has been reported via in situ formation of Ni(OH)2 NBs in the PVDF matrix. The formation and morphology of the NBs are confirmed by UV-visible spectroscopy and field emission scanning electron microscopy respectively. A remarkable improvement in electroactive β phase nucleation (∼82%) and the dielectric constant (ε ∼ 3.1 × 10(6) at 20 Hz) has been observed in the nanocomposites (NCs). The interface between the NBs and the polymer matrix plays a crucial role in the enhancement of the electroactive β phase and the dielectric properties of thin films. Strong interaction via hydrogen bonds between Ni(OH)2 NBs and the PVDF matrix is the main reason for enhancement in β phase crystallization and improved dielectric properties. The NC thin films can be utilized for potential applications as high energy storage devices like supercapacitors, solid electrolyte batteries, self-charging power cells, piezoelectric nanogenerators, and thin film transistors and sensors.
据报道，通过在聚偏氟乙烯（PVDF）基质中原位形成氢氧化镍纳米带（NB），实现了一种简便且低成本的合成方法，制备出具有优异介电性能的氢氧化镍纳米带修饰的电活性聚偏氟乙烯（PVDF）薄膜。分别通过紫外可见光谱和场发射扫描电子显微镜对纳米带的形成和形态进行了确认。在纳米复合材料（NCs）中，观察到电活性β相形核有显著改善（约82%），介电常数在20 Hz时达到ε ∼ 3.1 × 10(6) 。纳米带与聚合物基质之间的界面在增强电活性β相和薄膜介电性能方面起着关键作用。氢氧化镍纳米带与PVDF基质之间通过氢键的强相互作用是β相结晶增强和介电性能改善的主要原因。这种NC薄膜可用于超级电容器、固体电解质电池、自充电电源、压电纳米发电机以及薄膜晶体管和传感器等高能量存储器件的潜在应用。
