A negative pressure airflow collection method and device for electrospun micro-nano fibers

Abstract

The invention relates to a method and a device for negative-pressure air flow collection of electrostatic spinning micro-nano fibers. The device comprises a high pressure generator, a liquid storage device, a yarn spraying needle head, a liquid conveying pump, a negative pressure pipe, a mesh base cloth, a mesh base cloth transmission mechanism and a negative pressure air pump. The electrostatic spinning collecting side is provided with a negative pressure air suction port, the air flow generated by the air suction port is used for sucking the micro-nano fibers which are sprayed from the yarn spraying needle head end, and then the micro-nano fibers are absorbed onto the mesh base cloth in front of the air suction port in a fixed-point or fixed-area way. The mesh base cloth is controlled by the mechanism to do movement in the plane single-dimension direction or two-dimension direction, or to do regular rotation or translation, the micro-nano fibers are distributed on the mesh base cloth according to the relative movement track between the yarn spraying needle head and the mesh base cloth, and a uniform fiber net is formed through controlling the relative movement track and speed between the yarn spraying needle head and the mesh base cloth.

Description

technical field [0001] The invention belongs to the field of electrospinning, and relates to a negative pressure air flow collection method and device for electrospinning micro-nano fibers. Background technique [0002] Electrospinning has become the most important and effective method for preparing micro-nano fibers in batches, and is widely used in filtration, separation membranes, drug sustained release, wound coating, small-diameter artificial blood vessels, nerve guides, etc. Due to the instability of the electrospinning jet itself and the mutual interference of the electric field between the nozzles, the uniformity of the thickness of the micro-nano fiber web collected by the common flat or drum device is poor during multi-nozzle electrospinning. [0003] CN1849418A In the space between the charged electrode and the counter electrode, the air flow is used to act on the nanofibers to promote the nanofibers to drift away from the charged electrodes, and lay them on the e...

AI Technical Summary

Problems solved by technology

The three patents involve the use of negative pressure airflow to collect nanofiber bundles, but the electric field interference between the multiple nozzles causes the fibers ejected from the outer nozzles to spread obliquely outward, and is easy to adhere to the opening of the horn-shaped collector, resulting in waste of fibers and decapitation of nanofiber bundles

[0005] It can be seen that, in the electrospinning collection device, the collection method and related devices that utilize the negative pressure airflow to adsorb the micro-nano fibers ejected from each nozzle on the mesh base cloth before the air suction port have not been reported yet.

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