▎ 摘　　要

NOVELTY - Preparing flexible electronic sensor composite material comprises forming three-layer composite fiber filaments by microfluidic spinning, coating polyethylene melt at 85-110℃ on the surface of three-layer composite fiber filaments, cooling the polyethylene melt to 50-60℃, spraying nanofibers formed by electrospinning on the polyethylene melt coated three-layer composite fiber filaments by double-needle spraying to obtain nanofiber-containing multilayer composite material and spraying two-dimensional transition metal carbide (MXene) conductive ink on the nanofiber-containing multilayer composite material to obtain final product. In the three-layer composite fiber filament formed by microfluidic spinning, the material of core layer is graphene, the material of middle layer is polyvinylidene fluoride nanofiber or carbon nanotube, and the material of shell layer is polyurethane or graphene. The nanofiber formed by electrospinning is silk fibroin nanofibers. USE - The method is useful for preparing flexible electronic sensor composite material. ADVANTAGE - The prepared flexible electronic sensor composite material: has excellent conductivity, certain tensile strength extensibility, high sensitivity and stability; and reduces the risk of electrode short circuit. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation device for preparation of flexible electronic sensor composite material. The preparation device comprises microfluidic control preparation collecting device, electrospinning device and snare clamping spraying device, the microfluidic control preparation collection device includes coagulation bath, and the coagulation bath has solution collection device; one side on the opposite sides above the coagulation bath is provided with three microfluidic spinning needles arranged in parallel, and the other side includes a first transfer roller, a drying box and a second transfer roller in sequence. The electrospinning device is located under the second transfer roller, and includes a polyethylene collection box, a heating box, a double needle head for electrostatic spinning and a cooling collection roller in sequence from top to bottom, and polyethylene collection box is provided with a feed port, there are fiber collection holes on the heating box and the snare clamping and spraying device is located under the double needle head of the electrospinning pair, and includes the MXene ink ejector and the winding collection device. The MXene ink ejector and winding collection device are located in downward direction of cooling collection roller at an angle of forty-five degrees, and the MXene ink ejector includes a collecting jet tube and a snare device, the collecting jet tube has jet needle and feeding port, the snare device has a porous structure and a switch joint, and the collecting jet tube is connected with the snare device through the jet needle.