Novel device for electrostatic spinning, bundling and twisting of nano yarns

Abstract

The invention discloses a novel device for electrostatic spinning, bundling and twisting of nano yarns. The novel device for electrostatic spinning, bundling and twisting of the nano yarns mainly comprises a spraying device, a metal ring electrode, a two-stage cyclone airflow twisting device, a collecting device and a high-voltage generating device. The spraying device is divided into a jet device and an air injection device which are respectively connected with a solution tank and a high-pressure air storage tank through an infusion pipe and an air delivery pipe; the two-stage cyclone airflow twisting device is connected with a fan through an airflow communicating device and an air storage ring; the collecting device is arranged at the lower part of the two-stage cyclone airflow twisting device and is powered by a motor; and positive and negative electrodes of the high-voltage generating device are respectively connected with the spraying device and the metal ring electrode. The novel device for electrostatic spinning, bundling and twisting of the nano yarns provided by the invention is easy to operate, high in efficiency and capable of continuously preparing the nanofiber yarns with the high twist degree and the good yarn evenness.

Description

Technical field [0001] The present invention belongs to the field of electrostatic spinning, and in particular, the present invention relates to a gas stream-assisted electrostatic spun unit. Background technique [0002] Nanofibers are hot spots in today's research, with broad application prospects in the fields of sensors, biomedicine, microelectronic devices, functional textiles, comparing other production of nanofiber method, template synthesis, self-assembly, etc., The electrospinning fabrication fibers have the advantages of small fiber diameter, large density, large specific surface area, easy functionalization, but the fibers collected by static spun conventional methods are irregularly arranged nanofibers, and nanofiber non-woven felt mechanical properties are poor. The shortcomings such as the output, so the directional arrangement of nanofiber bundles and their twisted yarns have a wider market prospect. [0003] Today, the directional arrangement of nanofiber beams ar...

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Problems solved by technology

[0003] The current methods of preparing oriented nanofiber bundles include: (1) high-speed rotation collection method, using the tensile force generated by high-speed rotation to align the nanofibers, the disadvantage is that the centrifugal force of rotation affects the deposition of fiber bundles; (2) collection with sharp edges (3) Water bath collection method, using the drawing force of water flow to form nanofiber bundles. The nanofibers are stretched and pulled to form fiber bundles at the bottom of the water vortex. The disadvantage is that there is adhesion between the fibers; (4) Conjugated double-head method, using oppositely charged nozzles with opposite polarities to attract each other The disadvantage of forming nanofiber bundles is that the obtained fiber bundles are relatively thin; (5) Auxiliary electrode collection method, placing auxiliary electrodes in the electrostatic field to affect the distribution of the electric field to obtain nanofiber bundles, the disadvantage is that the orientation of the obtained nanofiber bundles is not high, and The twisting method after nanofiber directional clustering is mainly mechanical twisting, but mechanical friction will cause fiber damage, so reports of airflow twisting devices have appeared in recent years. Perform twisting to form nanofiber yarns, CN102703998A forms nanofiber yarns by twisting nanofiber bundles through airflow nozzles, but the twisting degree of the above method is not high and the efficiency is low

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