A valve-type microfluidic two-component electrospinning nozzle

Abstract

The invention provides a valve type microfluidic bi-component electrostatic spinning nozzle which mainly comprises a connecting piece, a shunting column casing, an inner charging barrel, an outer charging barrel, a screw, a receiving plate, a high-voltage electrostatic generator and a heating system. The inner charging barrel, the shunting column casing and the connecting piece are sequentially connected by coaxial threads from inside to outside. The connecting piece is connected with the outer charging barrel through the screw and the outer charging barrel is arranged under the connecting piece. Two feeding holes are formed, the feeding holes comprise the inner feeding hole and the outer feeding hole, and the inner feeding hole and the outer feeding hole are both formed in the upper surface of the connecting piece. The receiving plate is placed under a nozzle body and is connected with the high-voltage electrostatic generator. The valve type microfluidic bi-component electrostatic spinning nozzle is simple in structure, capable of achieving the micro-control of flow and preparing composite fibers of different component proportions, and not prone to being plugged. According to the production demand, the fibers of different dimensions are prepared by adjusting seam distances and technological parameters, the application range is wide, and the yield can be improved by changing the number of nozzles or the nozzle modes.

Description

technical field [0001] The invention relates to a valve-type microfluidic two-component electrostatic spinning nozzle, which belongs to the field of electrostatic spinning. Background technique [0002] With the rapid development of science and technology, society has put forward higher requirements for nanomaterials. Electrospinning has attracted much attention because it can prepare nanoscale fibers and has become a research hotspot in recent years. The fastest and most effective method. [0003] The capillary was once one of the most critical components of electrospinning. The diameter of the capillary determines the diameter of the fiber to a large extent, but the diameter of the capillary cannot obtain fibers of other diameters, and the capillary is prone to clogging during the spinning process. It seriously affects the continuous spinning, and it is difficult to clean, and the output is also low. However, the output of the needle-free nozzle invented in recent years ...

AI Technical Summary

Problems solved by technology

[0003] The capillary was once one of the most critical components of electrospinning. The diameter of the capillary determines the diameter of the fiber to a large extent, but the diameter of the capillary cannot obtain fibers of other diameters, and the capillary is prone to clogging during the spinning process. Seriously affect the continuous spinning, and it is difficult to clean, and the output is also low

However, the output of the needle-free nozzle invented in recent years has been greatly improved, but the structure is relatively complicated, and it is still prone to clogging, and the spinning material is single, which cannot meet the demand for multi-component fiber materials, and the flow rate cannot be controlled in real time.

The existing invention patent "a microfluidic electrospinning device" (CN203754860 U), this patent is to realize the control of micro flow through two syringes and the control valve between the syringe and the barrel, the barrel and the outlet, which can Control the amount of entry, but the flow at the nozzle is uncontrollable, and the device is placed horizontally, it is impossible to determine whether the barrel is full, and the flow control at the nozzle is even more difficult to achieve

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