A multifunctional electrospinning device

Abstract

The invention discloses multifunctional electrostatic spinning equipment. The multifunctional electrostatic spinning equipment comprises electrostatic spinning chambers, a preprocessing chamber, a sampling chamber, a disk feeding chamber and a sample receiving chamber and can achieve the functions of self-cleaning of electrostatic spinning nozzles, automatic sampling and sample replacing, in-situ modifying, continuous preparing of multi-layer nanofiber thin films and the like. The multifunctional electrostatic spinning equipment is characterized in that the three electrostatic spinning chambers are each provided with a nozzle fixator which can fix and clean the corresponding nozzle so that electrostatic spinning can be conducted smoothly; the sample receiving chamber comprises a sample disk fixator which is used for controlling rotation of sampling disks so that the sample disks can be switched between different units, and the functions of preprocessing, automatic sampling, automatic disk loading, preparing of the multi-layer nanofiber thin films and the like can be achieved. The preprocessing chamber and the sampling chamber can achieve preprocessing, acquisition and modification of electrostatic spinning products. The disk feeding chamber can automatically supplement the sample receiving chamber with the sample disks. The multifunctional electrostatic spinning equipment has the advantages of being simple in structure, convenient to operate and capable of improving the electrostatic spinning efficiency, having multiple functions and the like.

Description

technical field [0001] The invention belongs to the field of electrospinning, and in particular relates to an electrospinning device with the functions of nozzle self-cleaning, automatic sampling and changing, (in-situ) modification, continuous preparation of multi-layer nanofiber films and the like. Background technique [0002] With the development of the national economy and science and technology, people's demand for nanofiber materials is increasing. Electrospinning technology has unique advantages as a way to prepare one-dimensional nanofiber materials or nanofiber films, so it has been widely studied. and apply. Especially since the 1980s, with the introduction of the concept of nanomaterials, research has found that the optimization of electrospinning parameters can facilitate the preparation of nanofibers with diameters on the order of nanometers, which has aroused scientists' interest in electrostatic spinning. Spinning research interest and enthusiasm. Electrosp...

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Problems solved by technology

[0004] However, in electrospinning, if the viscosity of the precursor solution is too high, the solvent is more volatile than the solution (for example, when ethanol is used as the solvent), it is easy to cause the solution to solidify at the end of the nozzle, and a length of filament will grow (see attached figure 1 ), so that the nozzle is blocked; and if the polymer solubility of the precursor solution is low, the nozzle solution will form droplets and drip down. These phenomena make electrospinning difficult and reduce the efficiency of electrospinning

Secondly, the traditional electrospinning device generally uses the cathode (ground electrode) directly as the receiving plate to receive the electrospun products, which is not flexible and has certain limitations, such as: inconvenient sampling, difficult modification, receiving The thickness of the plate sample has an influence on the electric field and thus affects the appearance of the electrospun product: the research in this laboratory found that when the nanofibers were prepared by the ordinary electrospinning method, the sampling time of the electrospun products affected the appearance of the nanofibers : The sampling time is too long, that is, the spinning time is too long, the main nanofibers become thicker, accompanied by many fine fibers, and the diameter of the fibers is not uniform (see appendix figure 2 ), and when the sampling time is short, the nanofibers prepared by electrospinning are relatively uniform in thickness (see attached image 3 ), therefore, it is necessary to control the sampling time of electrospun products to control the morphology of nanofibers

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