HIGH-SENSITIVE FLEXIBLE STRAIN SENSOR BASED ON DIRECT-PRINTING OF MIXTURE OF METAL NANO PARTICLES AND CARBON NANO TUBES AMD MANUFACTURING METHOD THEREOF

摘要

A method of manufacturing a flexible strain sensor and a flexible strain sensor manufactured thereby are disclosed. The conductive line pattern is sandwiched by direct printing by spraying a predetermined conductive line pattern on one side of the flexible substrate at high speed and then covering it with a flexible cover and bonding it. The composite nanomaterial, which is a mixture of metal nanoparticles and carbon nanotubes, is excited by aerodynamically controlling the pumping timing and sprayed onto the surface of the flexible substrate through the spray nozzle in an aerosolized state. The sprayed printing material mixture collides with the surface of the flexible substrate, creates a crack on the surface, and the carbon nanotubes penetrate into the crack and are mechanically locked with the flexible substrate and fixed. Metal nanoparticles and carbon nanotubes are deposited thereon to have a predetermined width and height, so that the conductive line pattern of the strain sensor is directly printed. This direct printing can be performed in a low pressure atmosphere and at room temperature without the use of solvents or resins. After direct printing, no separate chemical post-treatment or heat treatment is required.