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首页> 外文期刊>RSC Advances >Enhanced electroactive beta-phase nucleation and dielectric properties of PVdF-HFP thin films influenced by montmorillonite and Ni(OH)(2) nanoparticle modified montmorillonite
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Enhanced electroactive beta-phase nucleation and dielectric properties of PVdF-HFP thin films influenced by montmorillonite and Ni(OH)(2) nanoparticle modified montmorillonite

机译：PVDF-HFP薄膜的增强的电活性β相成核和介电性能受蒙脱石和Ni（OH）（2）纳米颗粒改性蒙脱石

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摘要

The present work lays emphasis on the synthesis of electroactive and high dielectric poly(vinylidenefluoride-co-hexafluoropropylene) (PVdF-HFP) composite films incorporated with montmorillonite (MMT) and Ni(OH)(2) nanoparticle (NP) modified MMT using a facile and low cost solution casting technique. Formation of Ni(OH)(2) NPs, different polymorphs and morphology of the composite samples have been investigated using UV-visible spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, differential scanning calorimetry and field emission scanning electron microscopy. A remarkable improvement in beta-phase nucleation (similar to 85.22% for 1 mass% MMT doped at and 82.10% for 7.5 mass% NiMMT doped polymer composites films) and promising dielectric values are the standpoints of the work. Strong ion-dipole interaction between the negatively charged surfaces of MMT and -CH2 dipoles of the polymer chains in the MMT loaded PVdF-HFP samples and formation of hydrogen bonds between the -OH group of Ni(OH)(2) NPs and F atom of the polymer chains in the Ni(OH)(2) NP-MMT/PVdF-HFP system play a dynamic role in enhancing the electroactive b-phase nucleation and the dielectric properties of the samples. A large accumulation of charges at the interfaces of the dopant and polymer matrix via Maxwell-Wagner-Sillars interfacial polarization effect occurred due to the disparity in the conductivity of the dopants and the polymer matrix is liable for the significant enrichment of dielectric properties of the composite films. Excellent thermal stability in dielectric properties has also been observed in these composite samples over a wide temperature spectrum. These electroactive and high dielectric polymer composite thin films may be potential candidates for application in piezoelectric nanogenerators, energy storage devices, thin film transistors and capacitive sensors etc.
机译：本作者强调了用掺入蒙脱石（MMT）和Ni（OH）（2）纳米粒子（NP）改性MMT的电活性和高介电聚（偏苯二氟化酰基 - 六氟丙烯）（PVDF-HFP）复合膜的合成的重点便利和低成本解决方案铸造技术。使用UV可见光谱，X射线衍射，傅立叶变换红外光谱，差示扫描量热扫描电子显微镜研究，已经研究了Ni（OH）（2）NPS，不同的多晶型物和复合样品的形态学。 β相成核的显着改善（类似于1质量％MMT的85.22％，掺杂82.10％，对于7.5质量％Nimmt掺杂的聚合物复合材料薄膜，并且有希望的介电值是工作的观点。在MMT加载的PVDF-HFP样品中的MMT和-CH2偶极物的带负电荷表面与-HF-HFP样品中的带负电曲面与-OH（OH）（2）NPS和F原子的氢键的形成Ni（OH）（2）NP-MMT / PVDF-HFP系统中的聚合物链在增强样品的电活性B相成核和电介质性质方面发挥动态作用。由于掺杂剂的导电性和聚合物基质的差异而发生掺杂剂和聚合物基质的界面处的大量电荷在掺杂剂和聚合物基质的界面处发生的电荷和聚合物基质的显着富集复合材料的显着富集电影。在宽温度谱上，在这些复合样品中也已经观察到介电性质的优异热稳定性。这些电活性和高介电聚合物复合薄膜可以是用于在压电纳米液，能量存储装置，薄膜​​晶体管和电容传感器等中应用的潜在候选者。

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  • 来源
    《RSC Advances》 |2016年第26期|共14页
  • 作者

    Roy Swagata; Thakur Pradip; Hoque Nur Amin; Bagchi Biswajoy; Das Sukhen;

  • 作者单位

    Jadavpur Univ Dept Phys Kolkata 700032 India;

    Jadavpur Univ Dept Phys Kolkata 700032 India;

    Jadavpur Univ Dept Phys Kolkata 700032 India;

    Jadavpur Univ Dept Phys Kolkata 700032 India;

    Jadavpur Univ Dept Phys Kolkata 700032 India;

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  • 正文语种 eng
  • 中图分类 化学;
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