Micro-nano fiber blending material as well as preparation method and application thereof

The invention discloses a micro-nano fiber blending material as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) dissolving nanofiber powder in a DMF (Dimethyl Formamide) solvent, and magnetically stirring uniformly to obtain an electrostatic spinning solution; taking micron fibers for melt-blowing, and slicing for later use; (2) the electrostatic spinning receiving distance of the electrostatic spinning device is set to be 14-16 cm, and the spinning voltage is set to be 25-30 KV; the melt-blowing receiving distance of a melt-blowing device is set to be 24-33 cm, the extrusion temperature is 250-270 DEG C, the air pressure is 120-130 Kpa, the air suction speed under a net is 4000-5000 r/min, and the drying temperature is 140-160 DEG C; and (3) starting the electrostatic spinning device and the melt-blowing device, and preparing the micro-nanofiber blended filtering material on line. According to the method, two spinning technologies of melt-blowing and electrostatic spinning are combined, the micro-nano fiber blending material is efficiently prepared through a one-step method, and the micro-nano fiber material prepared through the method is stable in structure and controllable in surface density, thickness, fiber diameter, blending proportion and other parameters.