Multi-nozzle high-voltage electrostatic spinning apparatus added with electric field shielding device

Abstract

The invention belongs to the technical field of high-voltage electrostatic spinning, in particular relates to a multi-nozzle high-voltage electrostatic spinning apparatus which simultaneously co-spinsand superimposes the mono-component or multi-component materials with multi-scale micro- / nano-fiber and multi-scale microsphere fiber and is added with an electric field shielding device. The multi-nozzle high-voltage electrostatic spinning apparatus comprises a high-voltage power supply, a feeding device, a plurality of jet devices with nozzles respectively, a collection device and electric field shielding devices added among the plurality of jet devices. An electrospinning product can be one or more of micro-fiber, nano-fiber, nanosphere and microsphere which coexist at the same time. The prepared micro- / nano-fiber film can be used as an ultra-filtration film, a tissue engineering bracket, a drug slow-release material, and the like. The rough surface formed by the micro- / nano-fiber andthe microsphere can also be applied to the fields of the super-hydrophobic material, and the like. The method has the advantages of simple operation, wide application, relatively low cost, and the like, and has favorable application and generalization value.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrospinning, and in particular relates to a multi-nozzle with multi-scale micro / nano fibers, multi-scale microspheres / fibers and multi-component materials simultaneously co-spun and superimposed with the addition of an electric field shielding device High-voltage electrospinning equipment. Background technique [0002] High-voltage electrospinning technology is a micro-nano fiber preparation technology that has received extensive attention in recent years. By adjusting the experimental parameters, the size of the fiber can be adjusted arbitrarily from a few nanometers to tens of microns. It is currently the easiest way to prepare nanofiber materials. , cheap method, the resulting fiber membrane has the advantages of high porosity and large surface area, and is widely used in many fields such as ultrafiltration materials and tissue engineering scaffolds. Pay attention to the ultra-fine si...

AI Technical Summary

Problems solved by technology

[0002] High-voltage electrospinning technology is a micro-nano fiber preparation technology that has received extensive attention in recent years. By adjusting the experimental parameters, the size of the fiber can be adjusted arbitrarily from a few nanometers to tens of microns. It is currently the easiest way to prepare nanofiber materials. , cheap method, the resulting fiber membrane has the advantages of high porosity and large surface area, and is widely used in many fields such as ultrafiltration materials and tissue engineering scaffolds. Pay attention to the ultra-fine size and uniformity of nanofibers, but as the fiber diameter decreases, its mechanical properties are significantly weakened, and it is very easy to break. Although carbon nanotubes are used as reinforcing materials, the strength of the material can be improved, but carbon nanotubes The cost is high and it is not suitable for large-scale fiber preparation. However, using multiple nozzles to superimpose and co-spin microfibers and nanofibers at the same time can form a composite fiber membrane with microfibers as the skeleton and nanofibers as the filling. Combine the high strength of microfibers and the high surface area of ​​nanofibers to solve the problem of poor strength of a single nanofiber; at the same time, in the preparation of materials such as tissue engineering, it is necessary to stack multiple fibers together to form a film with multiple functions , which cannot be solved by using one nozzle, and multiple nozzles can also solve this problem; in addition, the existing single nozzle electrospinning device has a low spinning speed, and the use of multiple nozzles can also greatly increase the spinning speed, Thus realizing the continuous preparation of large-area fiber films

[0003] In previous studies on multi-nozzle high-voltage electrospinning, people mostly used a continuously rotating roller as a receiver, and placed a nozzle filled with a polymer solution at the opposite position on the side of the roller. When a certain voltage is applied at the same time, the fibers ejected from the two nozzles are superimposed layer by layer with the rotation of the roller. Due to the electric fields formed by the two nozzles and the roller, they interfere with each other and repel each other; at the same time The fiber bundles ejected from each nozzle are charged before reaching the negative electrode, and they repel each other (the same kind of charge repels each other), so that these fiber bundles are stretched by the electric field and their own charge repulsion. Incompatible with each other, the fibers generated by the two nozzles can only run along their respective electric field trajectories, and cannot be completely superimposed or mixed together. Therefore, the mixing is relatively good at the initial stage of spinning, but as time goes on, the It will be found that the fibers ejected from the two nozzles will be separated

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