Ultra-robust, Highly Stretchable, and Conductive Nanocomposites with Self-healable Asymmetric Structures Prepared by a Simple Green Method

Flexible conductive polymer nanocomposites based on silvernanowires(AgNWs) have been extensively studied to develop the next generationof flexible electronic devices. Fiber materials with high strengthand large stretching are an important part of high-performance wearableelectronics. However, manufacturing conductive composites with bothhigh mechanical strength and good stability remains challenging. Inaddition, the process of effectively dispersing conductive fillersinto substrates is relatively complex, which greatly hampers its widespreadapplication. Here, a simple green self-assembly preparation methodin water is reported. The AgNW is evenly dispersed in aqueous, i.e.,water-borne polyurethane (WPU) with water as the solvent, and a AgNW/WPUconductive nanocomposite film with an asymmetric structure is formedby self-assembly in one step. The film has high strength (& AP;49.2MPa) and high strain (& AP;910%), low initial resistance (99.9m & omega;/sq), high conductivity (9968.1 S/cm), and excellent self-healing(93%) and adhesion. With good self-healing performance, fibers witha conductive filler spiral structure are formed. At the same time,the application of the conductive composite material with an asymmetricstructure in intelligent wearability is demonstrated.

Automated summary

A simple green self-assembly method is used to evenly disperse AgNW in water-borne polyurethane, forming an AgNW/WPU conductive nanocomposite film with an asymmetric structure. The film exhibits high strength, high strain, low initial resistance, high conductivity, excellent self-healing, and adhesion.