Filled liquid metal circuits are the key to solve the problems of high resistance,low thermal conductivity and insufficient reliability of traditional liquid metal circuits,and the key to filled liquid metal circuits lies in the construction of microfluidic channels in the matrix and the component control of liquid metal composites.This paper summarizes the physicochemical properties of liquid metal,the preparation method of filled liquid metal circuits,and the applications in the fields of wearable devices,human-computer interaction,and soft robotics,focusing on the microfluidic tube injection method,microfluidic tube construction technology in the matrix,and the application of wearable devices.The preparation method of liquid metal flexible wires is discussed and its limitations in application are revealed.The corresponding optimization directions are proposed,so as to provide technical reference for the development of flexible electronic devices in the direction of high power,high reliability and integration.
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