Performance Research and Formulation Optimization of High-Performance Local Insulation Spray Coating Materials.

Area of Science:

• Materials Science
• Polymer Chemistry
• Electrical Engineering

Background:

• Bird nests on distribution network lines pose operational challenges.
• Epoxy resins offer rapid, room-temperature curing for nest site coating but require toughening due to brittleness and internal stress.

Purpose of the Study:

• To toughen polyurethane-modified epoxy resin for bird pest control applications.
• To investigate the effects of Al2O3, SiO2, and Mg(OH)2 particle fillers on resin properties.
• To optimize filler composition for enhanced mechanical and electrical performance.

Main Methods:

• Modification of polyurethane-modified epoxy resin with Al2O3, SiO2, and Mg(OH)2 particles.
• Design of orthogonal experiments to study filler effects.
• Evaluation of mechanical properties (tensile strength, elongation at break), electrical properties (breakdown strength), and thermal properties (glass transition temperature, T g).

Main Results:

• Synergistic effects observed between different particle fillers.
• Nanoparticles mitigated microparticle-induced defects, improving resin properties.
• Optimized composition (1.7% SiO2, 2.5% Al2O3, 7% Mg(OH)2) yielded a 70% increase in tensile strength, 67.53% increase in elongation at break, and 20.31% increase in breakdown strength.
• Glass transition temperature (T g) increased by 13.48 °C, indicating enhanced rigidity.

Conclusions:

• The addition of SiO2, Al2O3, and Mg(OH)2 significantly enhances the mechanical and electrical properties of polyurethane-modified epoxy resin.
• The toughened resin is suitable for coating power line components to deter bird nesting.
• Filler synergy and nanoparticle defect reduction are key to performance optimization.