A novel self-healing power cable insulating material based on host-guest interactions.

Area of Science:

• Materials Science
• Polymer Chemistry
• Electrical Engineering

Background:

• Power cable insulation materials are prone to damage, compromising performance and safety.
• Developing robust, self-healing materials is crucial for extending cable lifespan and reliability.

Purpose of the Study:

• To synthesize and characterize a novel self-healing polymer composite for power cable insulation.
• To investigate the self-healing capabilities, thermal stability, and electrical properties of the developed material.

Main Methods:

• Synthesized PVP/p(HEMA-co-BA) via radical polymerization incorporating a host-guest assembly (CD-Al2O3 NPs and HEMA-Ad).
• Utilized supramolecular interactions (host-guest and hydrogen bonding) for material construction.
• Evaluated material properties including thermal stability, electrical performance, and self-healing efficiency.

Main Results:

• The material exhibits dual supramolecular interactions: host-guest and hydrogen bonding.
• Achieved high thermal stability (up to 200 °C) and good electrical performance.
• Demonstrated repeatable self-healing property with efficiency dependent on cross-linking agent dosage; storage modulus reached 432 MPa at 20 °C.

Conclusions:

• The PVP/p(HEMA-co-BA) composite offers a promising solution for self-healing power cable insulation.
• The material's robust thermal and electrical properties, combined with its self-healing ability, enhance insulation reliability.
• The study highlights the potential of host-guest chemistry in designing advanced functional polymers.