The Addition of an Ultra-small Amount of Black Phosphorous Quantum Dots Endow Self-healing Polyurethane with a Biomimetic Intelligent Response.

This study explores new applications of black phosphorus quantum dots by adding them to self-healing material systems for the first time. Self-healing polyurethane with an ultra-small amount of black phosphorus quantum dots has biomimetic intelligent responsiveness and achieves balance between its mechanical and self-healing properties. By adding 0.0001 wt% black phosphorus quantum dots to self-healing polyurethane, the fracture strength of the material increases from 3.0 to 12.3 MPa, and the elongation at break also increases from 750 to 860%. Meanwhile, the self-healing efficiency remains at 98%. The addition of black phosphorus quantum dots significantly improves the deformation recovery ability of the composite materials and transforms the surface of self-healing polyurethane from hydrophilic to hydrophobic, making it suitable for applications in fields such as electronic skin and flexible wearable devices. This study provides a simple and feasible strategy for endowing self-healing materials with biomimetic intelligent responsiveness using a small amount of black phosphorus quantum dots. This article is protected by copyright. All rights reserved.