在交联聚合物混合物中用于高温储能应用的双极定向工程
Zizhao Pan1, Li Li1, Fei Jin1
1Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 29, 2024
概括
在色聚合物中的新胺基交叉连接提高了介电性能. 这一策略提高了聚合物介电材料的能量密度和分解强度,用于要求高的电子应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 电气工程 电气工程
背景情况:
- 先进的电子和电力系统需要聚合物介电材料,以适应恶劣的环境.
- 平衡介电常数 (K),断裂强度 (Eb) 和热稳定性是一个关键的挑战.
研究的目的:
- 开发用于高温应用的高性能聚合物介电材料.
- 通过修改氨基酸聚合物与胺交联来增强介电性质.
主要方法:
- 将胺交联网络引入蓝色聚合物中,以形成不对称的双极对.
- 研究 styrene-acrylonitrile/crosslinking styrene-maleic anhydride (SAN/CSMA) 的混合物. 这种混合物通常是酸和酸的混合物.
- 在高温下评估介电常数,分解强度和能量密度.
主要成果:
- 在120°C下,SAN/CSMA混合物实现了4.35的K和670 MV m-1的Eb.
- 获得了8.6 J cm−3 (120 °C) 和7.4 J cm−3 (150 °C) 的超高放电能量密度 (Ue),效率为90%.
- 这种新的策略表现出了出色的周期稳定性和适用于ABS/CSMA混合物.
结论:
- 胺交叉连接有效地激活蓝色组二极体,同时最大限度地减少极化损失.
- 这种方法显著提高了聚合物在高温下的介电性能.
- 开发的聚合物介电材料满足了对高温电子和电力系统的需求.
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