CN201506861U - A New High Efficiency Electrospinning Nozzle - Google Patents

Abstract

The utility model discloses a novel high-efficiency electrostatic spinning nozzle, which belongs to the field of electrostatic spinning. It includes two parts: a nozzle hole and a cone. A balance groove is processed on the tap surface, and the spinning solution or melt flows from the gap between each plane and the nozzle hole to the spin cone surface. At this time, the melt has certain inhomogeneity. When the melt reaches the balance groove, it will flow Secondary diversion, so that the melt distribution is more uniform. When the solution or melt is evenly distributed on the circumference of the large end of the spinneret cone, after adding an electrostatic field, the circumference of the large end of the spinneret cone will form multiple jet streams. This practical Based on the original high-efficiency nozzle, the new design greatly improves the uniformity of multiple jet streams through the design of the balance groove, and obtains more uniform electrospun fibers.

Description

A New High Efficiency Electrospinning Nozzle

technical field

The utility model relates to an electrostatic spinning nozzle, which belongs to the field of electrostatic spinning.

Background technique

With the heating up of nanotechnology, electrospinning method has become one of the current research hotspots because it can prepare nanoscale fibers. The electrospinning method has been recognized as the simplest and most effective method for preparing nanofibers. At present, more than 30 kinds of polymers have successfully prepared ultrafine fibers through this method, and the smallest diameter reaches tens of nanometers. Regarding the research results of electrospinning, the relevant literature has increased exponentially in recent years.

Electrospinning includes solution electrospinning and melt electrospinning. The proportion of solvent in the spinning solution of solution electrospinning exceeds 90%, and the solvent evaporates during the spinning process, so its efficiency is extremely low, generally 0.01g/min; while melt electrospinning has no evaporation of solvent, the efficiency It is much higher than solution electrospinning, and the utility model does not use the traditional capillary, but uses a new type of high-efficiency spinning nozzle, which greatly improves the melt spinning efficiency, but due to the flow of the high-efficiency nozzle The surface is conical, and the flow is only divided once through the cutting surface, so the uniformity of spinning cannot be well guaranteed.

Utility model content

The utility model proposes an improved new high-efficiency electrostatic spinning nozzle, which does not need to use capillary tubes, thus avoiding the problem of capillary blockage and the difficulty of processing capillary tubes, and can form multiple jet streams through this nozzle , greatly improving the efficiency of electrospinning, and adding a balance groove to perform secondary shunting of the melt, increasing the uniformity of the melt at the lower end of the cone, and improving the uniformity between the multi-strand spinnerets.

The utility model provides a novel high-efficiency electrostatic spinning nozzle, which includes two parts: the nozzle hole (1) and the cone (2), and the cone (2) also includes a matching cone that cooperates with the inner hole of the nozzle hole (1) body (4) and the spinneret cone (7) used for spinning, and the matching part of the cone (2) and the inner hole of the nozzle hole (1) to cut out several planes (5) and chamfer (6), the uncut part is the matching cone surface (8) on the matching cone (4), the matching cone surface (8) is matched with the inner hole of the nozzle hole (1), and the nozzle cone (7) is set There is a balance tank (10) for secondary splitting of solution or melt. The spinning solution or melt flows from the gap between each plane (5) and the inner hole of the nozzle hole (1) to the conical surface of the spinneret cone (7), and the uneven melt will be processed twice in the balance tank (10). Split, re-mix and distribute, and then continue to flow along the spinner cone (7). When the solution or melt is evenly distributed on the big end circumference (9) of the spinneret cone surface, after adding an electrostatic field, the large end circumference of the spinneret cone surface (9) will form a plurality of uniform jet streams (3).

The new high-efficiency electrospinning nozzle proposed by the utility model, in order to better play the role of shunting and mixing, the balance groove (10) of the spinneret cone (7) can be two or more structural forms . Moreover, the cross-sectional shape of the balance groove (10) on the spinneret cone (7) can be arc-shaped or polygonal.

The novel high-efficiency electrostatic spinning nozzle proposed by the utility model is obviously different from the general electrostatic spinning nozzle in that it does not need a capillary. The spinning solution or melt flows out from the matching gap between the nozzle hole (1) and the cone (2), and then passes through the balance tank (10) for secondary branching. After the melt flows out from the gap, it needs to pass through the balance groove (10), and the melt that was originally unevenly distributed due to various factors is divided into secondary flow, and finally the melt can evenly flow to the conical surface of the spinneret cone (7). big endian.

Description of drawings

Figure 1 is a schematic diagram of the assembly of a novel high-efficiency electrospinning nozzle of the present invention.

Fig. 2 is a cone axonometric view of a novel high-efficiency electrostatic spinning nozzle of the present invention.

In the figure: 1-spray hole; 2-cone; 3-jet flow; 4-cooperating cone; 5-plane; 6-chamfer; 7-spraying cone; 8-cooperating cone surface; Big end circumference; 10-balance slot.

Detailed ways

Below in conjunction with specific embodiment the utility model is described in further detail.

Example 1

In Fig. 1 and Fig. 2, the inner diameter of the spray hole (1) is 2mm, and the matching cone (4) of the cone (2) is equally divided into 4 planes (5), and the spray hole (1) and the matching cone surface ( 8) the maximum gap is 0.1mm, the inclination of the conical surface of the spinneret cone (7) is 58 °, the rounding angle of the small end of the spinneret cone (7) obtains a chamfer (6) of 45 °, and the balance groove (10 ) is 1.5mm in depth, and the diameter of the large end circumference (9) of the spinneret cone is 6mm. The nozzle hole (1) is closely matched with the matching cone surface (8), the nozzle is installed on the melt spinning device, and the spinning raw material is PP particles. When the PP melt melted by the melt spinning device is evenly distributed on the circumference of the large end of the spinneret cone (9), the melt flows through the secondary flow of the balance groove (10), and then flows downwards, adding an electrostatic field, and more The jet flow (3) of the strands is evenly ejected along the circumference of the large end of the spinneret cone, and the uniformity of the spinning is changed from the original 10 μm to 100 μm to 10 μm to 40 μm, and the uniformity is significantly improved.

Claims (3)

1. A new type of high-efficiency electrospinning nozzle, comprising two parts, the nozzle hole (1) and the cone (2), and it is characterized in that the cone (2) includes a cooperation with the inner hole of the nozzle hole (1) Cone (4) and the spinneret cone (7) that is used for spinning, the matching portion of cone (4) of cone (2) and nozzle hole (1) inner hole equally cuts out several planes (5 ) and chamfer (6), the uncut part is the matching cone surface (8) on the matching cone (4), the matching cone surface (8) is matched with the inner hole of the nozzle hole (1), and the upper part of the spinning cone (7) Equilibrium tank (10) for secondary distribution of solution or melt is provided. 2. A novel high-efficiency electrospinning nozzle according to claim 1, characterized in that there are two or more balance grooves (10) on the spinneret cone (7). 3. A novel high-efficiency electrospinning nozzle according to claim 1, characterized in that the cross-sectional shape of the balance groove (10) on the spinning cone (7) can be arc-shaped or polygonal.

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