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相关概念视频

Dielectric Polarization in a Capacitor01:31

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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
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在基于PVDF的系统中,用于微结构工程和增强介电功能的协同过程.

Joulia Housseini1, Florian Le Goupil1, Kaili Xie1

  • 1Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, Pessac, France.

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概括
此摘要是机器生成的。

修改基于化乙烯 (VDF) 的聚合物造条件可以提高其介电性质. 使用极性溶剂和真空回火提供了一种简单,具有成本效益的方法,用于提高电活性应用中的性能.

关键词:
介电性质 介电性质化电活性聚合物的化电活性聚合物.微观结构工程是微观结构的工程.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物科学 聚合物科学
  • 电活性聚合物 电活性聚合物

背景情况:

  • 基于乙烯 (VDF) 的聚合物具有显著的压电,火电和铁电性能.
  • 这些电活性特性对于传感器和储能器件的应用至关重要.
  • 介电特性受到晶体多态的影响,这取决于加工条件.

研究的目的:

  • 研究造条件,特别是溶剂选择和蒸发率对VDF基聚合物的介电性质的影响.
  • 为了确定加工修改,以提高这些聚合物的结构和介电性能.
  • 开发一个简化和成本效益的工业规模整合方法.

主要方法:

  • 系统评估不同的造溶剂.
  • 在薄膜形成过程中控制溶剂蒸发速度.
  • 应用真空回火处理处理后造.
  • 结构和介电性质的表征.

主要成果:

  • 从极极性溶剂中造VDF基聚合物导致了优越的结构特性.
  • 通过特定的溶剂选择和受控的蒸发观察到增强的介电性质.
  • 真空回火处理进一步提高了介电性能.
  • 优化方法在传统加工过程中显示出显著的改进.

结论:

  • 修改造条件,特别是溶剂选择和真空回火,有效地提高了基于VDF的聚合物的介电特性.
  • 这种方法为复杂的处理方法提供了一个简单,高效和潜在的可扩展的替代方案.
  • 这些发现为降低能源成本和简化基于VDF的聚合物的工业集成铺平了道路.