Multi-micropore spray head for electrostatic spinning

Abstract

An arc-shaped sector knife edge is formed in the single face of the bottom end of a fixing base below an arc-shaped groove, a plurality of spraying holes are formed in the arc-shaped sector knife edge, sector-shaped panels are connected to the bottom ends of the fixing base on the two sides of the arc-shaped groove, triangular plates are connected to the most edge portions of the bottom ends of the sector-shaped panels, and the triangular plates are connected to the most edge portions of the bottom ends of the sector-shaped panels. One end of a fan-shaped panel of the triangular plate is sequentially connected with a short-axis arc-shaped plate, a long-axis triangular plate, a short-axis arc-shaped plate and a long-axis triangular plate. Aiming at the related problems of insufficient capacity, industrialization and the like in the current electrospinning industry, the multi-micropore (micro-gap) spray head is adopted, so that the spinning speed of a single spray head reaches 2-30 times that of a common needle type spray head; according to the flow of a spinning solvent in the nozzle in fluid science, and according to the electric field principle, micropores are directly punched or micro slender gaps are directly machined in the arc sector nozzle, so that the mutual interference between filaments sprayed from the micropores or the micro gaps is reduced, and the filament diameter and the filament surface are uniform.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to a microporous nozzle for electrospinning. Background technique [0002] Electrospinning is a special form of electrostatic atomization of polymer fluids. At this time, the material split by atomization is not tiny droplets, but tiny jets of polymers, which can run for a long distance and finally solidify into fibers. Electrospinning is A special fiber manufacturing process, the polymer solution or melt is jet-spun in a strong electric field. Under the action of the electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, "Taylor cone"), and from The conical tip is extended to obtain fiber filaments, which can produce nanometer-scale diameter polymer filaments; [0003] However, most of the electrospinning machines on the market currently use multi-needle nozzles. The minimum length of the multi-needle nozzles is 13mm. Duri...

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Problems solved by technology

[0004] The present invention provides a multi-microporous nozzle for electrospinning, which can effectively solve the problem that the electrospinning machines currently on the market in the above-mentioned background technology mostly adopt a multi-needle type, and the multi-needle type nozzle has the shortest length of 13 mm. During the process, due to the protrusion of the needles, they interfere with each other during spinning. In order to avoid interference, the distance between each needle must have a large interval. Enlarging the distance between the nozzles has caused the problem of uniformity deviation of the silk surface

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