Preparation of Patterned Stretchable Conductor with High Performance Based on LMNPs and Silver Flakes

Abstract

AbstractStretchable conductor is the key component of stretchable electronic devices which has become an important development direction of flexible electronic. Patterned stretchable conductor is one of the key technologies for successfully manufacturing stretchable electronic devices. In order to acquire stretchable conductor with good conductivity and stable mechanical stretchability, stretchable conductive ink based on liquid metal nanoparticles (LMNPs) and silver flakes was developed and printed on the modified PDMS substrate by screen printing technology. Liquid metal recovered the fluidity and connected with the silver flakes under pressure after drying. So the fluidity and conductivity of the liquid metal can be used to achieve the preparation of stretchable conductor and overcome the trade-off between conductivity and stretchability. The initial resistance of prepared stretchable conductor is 2 Ω, and the resistance change rate is 0.65 when the tensile strain is 110%. At the same time, it still has a low resistance of 42.7 Ω and resistance change rate of 20.35 when the tensile strain is 660%.KeywordsLiquid metalStretchable conductorConductivityTensile strainPrinting