从聚合物纳米复合材料制成的柔性高温介电材料
Qi Li1, Lei Chen1, Matthew R Gadinski1
1Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Nature
|July 31, 2015
概括
具有化纳米板的新聚合物纳米复合材料在高温下具有稳定的介电性质. 这些先进的材料可用于电动汽车和航空航天的高压储能.
科学领域:
- 材料科学
- 聚合物科学
- 纳米技术
背景情况:
- 介电材料对于电子和电力系统至关重要.
- 聚合物介电材料比陶具有优势,但由于工作温度低而受到限制.
- 电动汽车等应用中的极端条件需要高温介电溶液.
研究的目的:
- 开发具有增强热稳定性和高压储能能力的聚合物介电材料.
- 研究化纳米板对交联聚合物纳米复合物的介电性质的影响.
- 克服传统聚合物介电物的温度限制,用于先进的应用.
主要方法:
- 包含化纳米片的交联聚合物纳米复合材料的制造.
- 介电性质的表征,包括分解强度和能量密度,在广泛的温度范围内.
- 对电导,热导和机械灵活性进行评估.
主要成果:
- 开发的纳米复合材料在广泛的温度和频率范围内表现出稳定的介电特性.
- 在250°C达到高压电容储能记录 (403 MV/m分解强度,1.8 J/cm3能量密度).
- 与原始聚合物相比,显著降低了电导率和热导率,减轻了热失控.
结论:
- 化纳米板的结合提高了聚合物纳米复合物的热稳定性和介电性能.
- 这些材料适用于高温,高压的储能应用.
- 纳米复合材料的轻量化,灵活性和光模式性使其在先进电子领域的应用范围更广.
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