High-performance insulation materials from poly(ether imide)/boron nitride nanosheets with enhanced DC breakdown strength and thermal stability

He Li, Zongliang Xie, Lilan Liu, Zongren Peng, Qisheng Ding, Lulu Ren, Ding Ai, Wuttichai Reainthippayasakul, Yuqi Huang, Qing Wang

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Environmentally-friendly polymers which can be recycled and reused at the end of life are urgently needed for the development of advanced high-voltage direct current (HVDC) systems. Polymer nanocomposites have attracted considerable attention owing to their unique features arising from synergistic combination of inorganic fillers and polymer matrices. Here we describe thermoplastic poly(ether imide) (PEI) nanocomposites that contain boron nitride nanosheets (BNNSs). It is found that the polymer nanocomposites exhibit simultaneous improvements in multiple physical properties, such as the DC electrical breakdown strength, volume resistivity, mechanical strength and thermal stability, along with substantial reduction in loss tangent, compared with neat PEI. A great improvement in thermal conductivity has been attributed to the presence of BNNSs in the composites, which improves heat dissipation in comparison with neat polymers. The composite approach provides a promising solution for alleviating temperature-gradient distribution and addressing heat accumulation issues in HVDC equipment, and enables broader applications of insulation materials in HVDC systems operated under high voltages.

Original languageEnglish (US)
Article number8726017
Pages (from-to)722-729
Number of pages8
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Volume26
Issue number3
DOIs
StatePublished - Jun 2019

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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