相关实验视频
Updated: Jun 15, 2026
11:15
Nanosponge Tunability in Size and Crosslinking Density
Published on: August 4, 2017
7.6K
稀释纳米复合材料:调整聚合物链局部纳米结构以增强介电反应
Guanchun Rui1, Jerzy Jerry Bernholc2, Shihai Zhang3
1Arkema Inc., 900 First Avenue, King of Prussia, PA, 19406, USA.
Advanced materials (Deerfield Beach, Fla.)
|February 12, 2024
概括
发现了对介电聚合物的新方法:稀释的纳米复合材料含量小于0.5%的纳米填充剂显著提高了介电性能,为电子设备提供高能量密度和低损耗.
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
- 纳米技术纳米技术
背景情况:
- 具有高能量和低损耗的介电聚合物对于电子和电气设备至关重要.
- 传统的高压电常数 (高K) 纳米填充复合材料 (>10体积%) 在提高压电性能方面取得了有限的成功.
研究的目的:
- 审查发现和进步在一种非常规的方法来提高使用稀释纳米复合材料的聚合物的介电性能.
- 探索纳米填充器负载较低的聚合物中增强介电性质背后的机制.
主要方法:
- 对稀释聚合物纳米复合材料的实验研究的综述.
- 在聚合物矩阵中分析接口变化和自由体积效应.
- 通过低K纳米填充剂对电荷捕获机制的研究.
主要成果:
- 纳米填充剂诱导的接口变化延伸超过100nm.
- 在聚合物中增加的自由体积可以提高介电常数 (K),而不会影响分解强度.
- 低K纳米填充剂在低负载时起到充电陷的作用,减少损失并增加分解强度.
结论:
- 稀释纳米复合材料为设计高性能介电聚合物提供了一种新的策略.
- 这种方法实现了高K,最小损失和强大的破坏场.
- 这些材料适用于广泛的温度范围内的高能量和功率密度应用.
相关概念视频
01:09Colloidal precipitates
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
01:24Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...