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动态交联聚乙烯网络具有高储能和电损伤自愈能力

Zhen Li¹, Yanxiu Wen², Zhe Song¹

¹School of Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.

ACS macro letters

|October 4, 2023

概括

研究人员为先进的电气设备开发了动态交联聚乙烯 (PE-MA-Epo) 材料. 这些材料具有高能量密度和自我愈合特性,提高介电聚合物的可靠性和使用寿命.

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
电气工程电气工程

背景情况:

介电聚合物对于电气设备至关重要,但提高能量密度往往会增加介电损失.
电损坏,如电树,显著降低了介电材料的可靠性和寿命.
当前的材料面临着介电性质和电应力下的耐用性之间的权衡.

研究的目的:

开发具有高能量密度,低介电损失和增强耐用性的新型介电聚合物材料.
解决传统介电聚合物的局限性,特别是它们对电损害的易感性.
研究新材料的自我修复能力,以提高电气应用中的可靠性.

主要方法:

动态交联聚乙烯材料 (PE-MA-Epo) 的合成,使用聚乙烯-移植-雄性无水化物 (PE-MA) 和极性环氧单体.
介电性质的表征,包括介电常数 (εr) 和介电损耗 (tan δ).
评估能量密度 (Ue),分解强度 (Eb),放电效率和电树形成后的自我愈合能力.

主要成果:

PE-MA-Epo表现出高压电常数 (>7),低压电损失 (<0.02) 和高能量密度 (5.16 J/cm3 在425 MV/m).
该材料表现出卓越的排放效率 (97%) 和性能与双轴定向聚烯 (BOPP) 薄膜相提并论.
自治能力允许在电树治愈后恢复介电性质,在两个治愈周期后,断裂强度保持在80%.

结论:

由于其优越的介电特性和能量密度,PE-MA-Epo为下一代电气设备提供了有前途的解决方案.
自愈特性显著提高了介电聚合物的耐用性和可靠性,延长了它们的使用寿命.
这些先进材料在高性能电子动力设备中具有很大的应用潜力.

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