A near-field airflow electrospinning direct writing device

Abstract

The invention relates to a near-field airflow electrospinning direct-writing device and relates to an electrospinning direct-writing device. The near-field airflow electrospinning direct-writing device comprises a nozzle, a miniature three-jaw chuck, a nozzle base, a liquid supply interface, a wiring terminal, a high-voltage power supply, a liquid inlet passage, a liquid supply device, an air supply device, an air inlet passage, a two-layer airflow cavity, an auxiliary positioning block, a U-shaped airflow passage, an air injection block and a collector; the nozzle base integrates the wiring terminal, the liquid inlet passage, the air inlet passage and the liquid supply interface, the wiring terminal is arranged at the upper end of the nozzle base, and the high-voltage power supply is connected with the nozzle base through the wiring terminal; the liquid supply interface is arranged at the lower end of the nozzle base, and the nozzle is connected with the liquid supply interface; the liquid inlet passage and the air inlet passage are arranged on a round end face of the nozzle base, the liquid inlet passage is connected with the liquid supply device, and the air inlet passage is connected with the air supply device; the air injection block is connected with the nozzle base, the miniature three-jaw chuck is connected with the nozzle base, and the two-layer airflow cavity is formed by a cavity between the air injection block and the nozzle base; auxiliary positioning is performed on the nozzle by the auxiliary positioning block; the air injection block is provided with the U-shaped airflow passage; the collector is grounded.

Description

technical field [0001] The invention relates to an electrospinning direct writing device, in particular to a near-field gas flow electrospinning direct writing device integrated with sheath gas focusing. Background technique [0002] Electrospinning is currently one of the main methods for producing nanofibers in the world. It has become a hot spot in the current research on nanofiber manufacturing due to its excellent characteristics such as simple equipment and convenient operation. [0003] The principle of electrospinning is: when the polymer solution is charged with high-voltage static electricity, a Taylor cone is formed under the action of an electric field. When the electric field force gradually increases, the polymer droplet overcomes the surface tension to form a jet. During the injection process, the jet is stretched into a straight line due to solvent evaporation and electric field force, and bends and whips after reaching a certain length, and the formed fiber...

AI Technical Summary

Problems solved by technology

[0004] Near-field electrospinning direct writing refers to the preparation of ordered fibers by using the initial stable linear stage of the jet, which overcomes the shortcomings of the jet spiral and bending unstable movement during the jetting process of traditional electrospinning

However, the charge carried by the direct writing jet is ejected from the Taylor cone, and it will also produce small-scale fluctuations due to the force of the charge and the force of the uneven electric field, which will affect the accuracy of direct writing.

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