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相关概念视频

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

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An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
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Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites
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对具有电磁干扰屏蔽的聚合物矩阵复合材料的外部现场辅助技术.

Chaobo Liang1, Hua Qiu2, Yali Zhang2

  • 1Shanxi Key Laboratory of Nano Functional Composites, School of Materials Science and Engineering, North University of China, Taiyuan 030051, China; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.

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概括

开发先进的电磁干扰 (EMI) 屏蔽材料对于移动设备至关重要. 本研究探讨使用外部场来定位聚合物复合材料中的填充剂,提高EMI屏蔽性能并防止信息泄漏.

关键词:
电磁干扰屏蔽 电磁干扰屏蔽外部现场辅助技术导向结构的导向结构.聚合物矩阵复合材料的复合材料.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 电磁学 电磁学 电磁学 电磁学

背景情况:

  • 移动设备的普及需要高性能电磁干扰 (EMI) 屏蔽材料.
  • 信息安全和电磁辐射抑制是关键问题.
  • 在聚合物矩阵中填充剂的方向显著影响EMI屏蔽的有效性.

研究的目的:

  • 通过外部场感应在聚合物复合材料中构建导电网络的策略进行审查.
  • 通过利用外部场来定位无机填充物来制备EMI屏蔽复合材料的研究.
  • 分析外部场诱导复合材料的结构-属性关系及其与电磁波的相互作用.

主要方法:

  • 审查现有的关于外部现场辅助填充剂方向的文献.
  • 使用的外部场的分类:温度,静电,重力,机械和磁场.
  • 复合结构及其电磁波相互作用机制的分析.

主要成果:

  • 外场感应为在聚合物复合材料中创建有序填充结构提供了一个有希望的途径.
  • 各种外部场可以有效地诱导填充剂的方向,从而改善EMI屏蔽.
  • 了解诱导结构和电磁波响应之间的相互作用是关键.

结论:

  • 外场感应是设计高性能聚合物矩阵EMI屏蔽复合材料的重要策略.
  • 需要进一步的研究来应对这一领域的关键科学挑战.
  • 这项工作为创新的复合材料设计提供了指导,用于增强EMI屏蔽.