Enhancing the healability and degradability of epoxy via synergetic steric and electron-withdrawing effects for green electrical packaging

Pursuing healable and degradable materials without sacrificing insulation performance becomes a great challenge for developing green electrical packaging. Herein, we report the development of a new epoxy to overcome the problem via fluorine and aryl incorporation to achieve synergetic steric and electron-withdrawing effects. The epoxy possesses remarkable healing capabilities for both mechanical and electrical treeing damage, while simultaneously exhibiting a high breakdown strength (77 MV m⁻¹), robust mechanical strength (43 MPa), and admirable glass transition temperature (113 °C, DMA). Moreover, with excellent degradability, its use is demonstrated for fabricating an insulating board matrix and high voltage resistor packaging. The epoxy can be mildly degraded to recycle intact fiber fabrics, inorganic fillers and electrical devices, making it promising for green electrical packaging applications.