Flexible Conductive PU Composition With Light-Activated Self-Healing

The patent removes the harmful solvent component from the preparation system entirely, transitioning from a solvent-based method to a solvent-free method. This extraction of the harmful element solves the environmental pollution problem while maintaining the core polyurethane synthesis reaction through direct mixing of polyol, isocyanate, and conductive fillers.

The patent changes the fundamental parameter of the preparation system from solvent-based to solvent-free. This parameter change transforms the entire preparation approach, eliminating environmental pollution while requiring optimized mixing and curing conditions to achieve proper material formation without solvent mediation.

The patent replaces expensive silver nanowire fillers with low-cost carbon-based fillers including carbon black and multi-walled carbon nanotubes. These cheaper alternative materials provide sufficient conductive functionality without the high cost associated with precious metal fillers, making the final product economically viable.

The patent employs a composite filling system combining carbon black and multi-walled carbon nanotubes. This composite approach leverages the complementary properties of different carbon materials to achieve effective conductivity at low cost, avoiding the need for expensive single-component fillers like silver nanowires.

The patent creates localized conductive networks within the polyurethane matrix rather than uniformly distributing high amounts of filler throughout. By forming interconnected conductive pathways at optimal concentrations, the material achieves sufficient conductivity while preserving the bulk mechanical properties and self-healing capabilities of the polyurethane.

The patent uses a composite filling system with carbon black and multi-walled carbon nanotubes that form efficient conductive networks at low concentrations. This composite approach maximizes conductivity per unit of filler, allowing minimal filler content to achieve the desired electrical performance without compromising mechanical strength.

The patent changes the activation parameter for self-healing from high temperature or strong UV light to mild visible light irradiation. By incorporating diselenide bonds that can be cleaved and reformed under gentle light conditions, the material becomes applicable in a broader range of environments where extreme temperatures or intense UV exposure are not available.

The patent replaces thermal or strong UV activation mechanisms with optical activation using visible light. This substitution of the activation mechanism allows self-healing to occur under milder, more universally available conditions, expanding the practical application scope of the self-healing polyurethane material.

The patent replaces expensive silver-based fillers with inexpensive carbon-based alternatives including carbon black and multi-walled carbon nanotubes. These low-cost materials provide adequate conductive performance without the high material cost of precious metals, enabling economical production of conductive polyurethane materials.

The patent employs a composite filling strategy combining carbon black and multi-walled carbon nanotubes to achieve efficient conductive networks at low filler concentrations. This composite approach maximizes the conductive efficiency of the filler system, reducing the total filler content needed while maintaining both electrical and mechanical performance.