Preparation method of high-adhesion nanofiber filter material and electrostatic spinning device of high-adhesion nanofiber filter material

Abstract

The invention discloses a preparation method of a high-adhesion nanofiber filter material and an electrostatic spinning device of the high-adhesion nanofiber filter material, and the method comprises the following steps: (1) adding a polymer into N 'N-dimethylformamide, and after the polymer is fully dissolved, adding acrylic acid and a catalyst to obtain a spinning solution; (2) adding itaconic acid into ethyl alcohol, and after itaconic acid is fully dissolved, obtaining spraying liquid ; (3) spraying the spraying liquid obtained in the step (2) onto a substrate to obtain a treated substrate; (4) injecting the spinning solution into a liquid supply system in an electrostatic spinning device,adjusting spinning process parameters for spinning, placing a substrate on a negative electrode plate in the electrostatic spinning device, and moving the substrate transversely at a constant speed; and (5) depositing a nanofiber membrane on the substrate moving at the constant speed, and polymerizing the itaconic acid on the surface of the substrate with the nanofiber to obtain the nanofiber filter material with enhanced adhesion. The adhesion between the nanofiber filter materials is high, and after the nanofiber filter materials are washed with water for four times, the filtering efficiency of the nanofiber filter materials on particles of 0.3 mu m @32 L / min is still maintained to be 85% or above.

Description

technical field [0001] The invention relates to a preparation method of a filter material and an electrostatic spinning device thereof, in particular to a preparation method of a high-adhesion nanofiber filter material and an electrostatic spinning device thereof. Background technique [0002] Electrospinning technology is one of the most efficient and convenient technologies for preparing nanofibers. It is to overcome the surface tension of the polymer melt or solution under the action of a high-voltage electrostatic field to form a jet stream, which is further stretched, split, solidified or solvent volatilized. , and finally deposited on the receiver plate to form fibers. Electrospinning equipment can produce nanofibers with different size distributions according to different formulations. Due to the thin thickness, soft texture and poor mechanical properties of nanofibers produced by electrospinning, it is necessary to set up a substrate for support. The substrates of ...

AI Technical Summary

Problems solved by technology

The fiber in the electrospinning technology has a limited moving distance in the electric field and cannot form a large speed. Therefore, the binding force with the polymer substrate such as PP non-woven fabric and PET is small, and the nanofiber is easy to separate from the substrate. fall off

[0003] Patent CN110478980A discloses a nanofiber filter material. The nanofiber filter material layer is made of a polymer nanofiber material. The mass ratio of the polymer to the solvent is (5-40):100. The silk method is directly spun on the first spunbond filter material layer, and then pressed to connect a second spunbond filter material layer to form a sandwich-structured nanofiber filter material. Only by adjusting the spinning solution formula and using direct pressing The combined method makes the spunbond filter material layers connected, and the bonding between the filter layers of the nanofiber filter material is poor.

[0004] The nanofiber filter material prepared by the existing method has poor adhesion between the nanofiber and the substrate, and the filtering effect is not good

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