Macromolecular Voltage Stabilizer for Enhanced Initiation Characteristics of Electrical Tree in Silicone Rubber
Macromolecular Voltage Stabilizer for Enhanced Initiation Characteristics of Electrical Tree in Silicone Rubber
复制标题
用于增强硅橡胶电树引发特性的高分子电压稳定剂
DOI：
10.1109/tdei.2022.3146458
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发表时间：
2022
影响因子：
3.1
通讯作者：
X. Cui
中科院分区：
文献类型：
--
作者：
Yuanxiang Zhou;Quzong Gesang;Ling Zhang;Jihuan Tian;Jianning Chen;X. Cui
提高绝缘材料的电阻是挤压电力电缆发展的关键。在高分子材料中掺入电压稳定剂是抑制电力电缆电老化的有效途径。然而，小分子电压稳定剂通常与聚合物的相容性差。在此，我们合理地设计和合成了一种大分子电压稳定剂（蒽接枝聚二甲基硅氧烷，An@PDMS）具有良好的分散性An基团共价键合到硅橡胶（SIR）的固化剂。研究了An@PDMS负载量对电性能的影响。值得注意的是，一个显着的增强（高达57%）的电树的起始电压，实现了在优化的An@PDMS/SIR与1.0重量%的An负载，沿着随着改善的交流击穿强度（BDS），较低的直流电导率，较少的正电荷积累，并伴随着较小的场畸变在室温下。高度分散和共价键合的An稳定剂为高能空穴提供了足够的捕获位点，从而提供更好的绝缘性能。我们的高分子稳压器设计策略对于未来可定制的工程聚合物具有吸引力。
Improving the electrical resistance of insulating materials is critical for the development of extruded power cables. Incorporating voltage stabilizers into polymeric materials is an effective way to inhibit electrical aging of power cables. However, small-molecular voltage stabilizers usually suffer from poor compatibility with polymers. Herein, we rationally designed and synthesized a macromolecular voltage stabilizer (anthracene grafted polydimethylsiloxanes, An@PDMS) featuring well-dispersed An groups covalently bonded to the curing agent of silicone rubber (SIR). The effects of An@PDMS loading on the electrical performance were investigated. Notably, a significant enhancement (up to 57%) of the initiation voltage of electrical tree was achieved in an optimized An@PDMS/SIR with 1.0 wt% An loading, along with improved ac breakdown strength (BDS), lower dc conductivity, less positive charge accumulation, and concomitant smaller field distortion at room temperature. The highly dispersed and covalently bonded An stabilizer provides sufficient trapping sites for high-energy holes, rendering better insulation performance. Our macromolecular design strategy for voltage stabilizers is attractive for future tailorable engineering polymers.