A string type electrospinning device and method

Abstract

The invention discloses a string type electrostatic spinning device and method, and belongs to the field of spinning. The string type electrostatic spinning device mainly comprises spinning strings, an automatic string plucking device, a receiving pole plate, a solution pool, a servo solution supply system and a high-pressure electrostatic generator, wherein the spinning strings are arranged at the top end of the solution pool at equal intervals, and arranged above or below the water level of a solution within a certain range, the automatic string plucking device is composed of plucking heads, a driving wheel and a driving belt, and arranged above the spinning strings, each plucking head is composed of a rubber contact and a cam, the plucking heads are arranged on a guide rail at equal intervals, and the pointed ends of the rubber contacts are arranged on the spinning strings to make the spinning strings to vibrate vertically periodically. On a wave crest, vibrating force and electric field force act together so that a Taylor cone can be promoted to be formed more easily, and the electric field force needed for generating the Taylor cone is reduced. The inherent frequency and the waveform of the spinning strings are changed by having control over the lengths of the parallel spinning strings, the linear density, the tension and the rotating speed, the number and the spacing distance of the plucking heads, and quantitative control over the spinning process is achieved.

Description

technical field [0001] The invention relates to a string-type electrostatic spinning device and method, belonging to the field of electrostatic spinning. Background technique [0002] Nanofibers are widely used in today's world because of their fine fiber diameter, large specific surface area, and high porosity. The preparation of nanofibers by electrospinning is simple and easy, and the electrospun fibers have good controllability. However, the spinning efficiency of the traditional pinhole electrospinning device is low, only about 300 mg / h, and the pinholes are easy to block, which is not conducive to the industrialization of electrospinning. For this reason, people began to study needle-free electrospinning devices, including drum type, disc type, helical wire type, inner and outer cone type, etc. This technology can greatly increase the yield of electrospinning by applying a high-voltage electric field on a wide liquid free surface to generate multiple Taylor cones. A...

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Problems solved by technology

Although needle-free electrospinning devices such as "A Bubble Electrospinning Device" (Patent No. CN201310693050), "Rotary Spinning Electrode" (Patent No. US8573959B2), "Electrospinning Assembly" (Patent No. The output of spinning fibers, but in the spinning process, a huge electric field force is required to form a Taylor cone from a wide liquid surface. The general working voltage is 80-200KV, which is easy to cause arc discharge between electrodes or air breakdown, which also leads to a large process. power loss

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