The effect of co-doped with nano- MgO and nano-TiO2 on breakdown strength and aging life of polyimide nanocomposites

2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2020-10-18 DOI:10.1109/CEIDP49254.2020.9437435

Yushu Li, Sang Cheng, Qi Li, Jinliang He

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引用次数: 1

Abstract

As a high-temperature insulating material, polyimide is widely used in the inter-turn insulation of motors. In the actual working conditions, polyimide which works under long-term high-frequency square pulse wave, is prone to premature aging, and even breakdown. Most of the researchers investigated the polyimide polymer doped with single nanoparticles to improve its performance. However, the polyimide nanocomposite films doped with various nanoparticles has not been widely studied. In this paper, the polyimide nanocomposite films doped with surface modified nano-MgO and nano-TiO2were prepared by in-situ polymerization. Furthermore, the influence and mechanism of the doped nanoparticles was proposed based on the measurement of the breakdown strength and the corona aging life. The experimental results show that the polyimide nanocomposite films doped with nano-MgO and nano-TiO2 can improve the breakdown strength and the aging life simultaneously. This research has a practical significance on the modification of polyimide material.

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纳米MgO和纳米tio2共掺杂对聚酰亚胺纳米复合材料击穿强度和老化寿命的影响

聚酰亚胺作为一种高温绝缘材料，广泛应用于电机匝间绝缘。在实际工作条件下，长期工作在高频方波下的聚酰亚胺容易发生早衰，甚至击穿。大多数研究人员研究了单纳米颗粒掺杂聚酰亚胺聚合物以提高其性能。然而，掺杂各种纳米粒子的聚酰亚胺纳米复合膜尚未得到广泛的研究。本文采用原位聚合法制备了表面改性纳米mgo和纳米tio2掺杂的聚酰亚胺纳米复合膜。此外，通过击穿强度和电晕老化寿命的测量，提出了纳米粒子掺量的影响机理。实验结果表明，掺杂纳米mgo和纳米tio2的聚酰亚胺纳米复合膜可以同时提高击穿强度和老化寿命。本研究对聚酰亚胺材料的改性具有实际意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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