Flocculent nanofiber electrostatic spinning equipment

Abstract

The utility model provides flocculent nanofiber electrostatic spinning equipment which comprises a solution box containing spinning solution, a spinning electrode is arranged in the solution box, and the solution box is of a side opening structure with one side shielded and the other side opened. A side opening of the solution box directly faces a fiber collecting device, the fiber collecting device comprises a metal flow guide part, the metal flow guide part is provided with an exposed flow guide face capable of guiding fluid from a high position to a low position, and the flow guide face directly faces the side opening of the solution box; the upper end of the flow guide face is connected with a fluid input channel, the lower end of the flow guide face is led to a fluid collecting container, and a grating or a filter screen used for intercepting or filtering flocculent nanofibers mixed in fluid is arranged in the fluid collecting container. And a potential difference is formed between the spinning electrode and the metal flow guide piece.

Description

Technical Field

[0001] The utility model relates to a flocculent nanofiber electrostatic spinning device. Background Art

[0002] After being crushed, flocculent nanofibers can be formed into short fibers with a diameter of several hundred nanometers and a length of several hundred nanometers to several hundred micrometers. They can be made into slurry and have a wide range of uses in nanofiber catalysts, nanofiber coatings, and films.

[0003] At present, most electrospinning equipment is mainly used to produce nanofiber membrane materials. However, for the production of flocculent nanofibers, the flat plate, roller and screen receiving devices of this type of equipment are difficult to collect or the collection efficiency is very low. In particular, the existing needle-free spinning equipment, its solution box and electrodes cannot be inverted downwards, which limits the collection of such flocculent fibers from water. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a flocculent nanofiber electrospinning device which can effectively improve the flocculent fiber collection efficiency.

[0005] The technical problem to be solved can be implemented through the following technical solutions.

[0006] A flocculent nanofiber electrostatic spinning device includes a solution box containing a spinning solution, wherein a spinning electrode is arranged in the solution box, and the device is characterized in that:

[0007] The solution box is a side opening structure with one side blocked and the other side open; the side opening is opposite to a fiber collecting device, the fiber collecting device includes a metal flow guide, the metal flow guide has an exposed flow guide surface that can guide the fluid from a high position to a low position, the flow guide surface is opposite to the side opening of the solution box; the flow guide surface is connected to a fluid input channel, the lower end of the flow guide surface leads to a fluid collecting container, the fluid collecting container is provided with a grid or filter for intercepting or filtering flocculent nanofibers mixed in the fluid; a potential difference is formed between the spinning electrode and the metal flow guide.

[0008] Furthermore, the guide member is a metal plate, a metal wire, a rolling body or a rotating body, and its related surface forms the guide surface.

[0009] Furthermore, the fluid is water flow, and the flow rate of the water flow is 0.01 to 10 meters per second.

[0010] Furthermore, a high voltage is applied to the spinning electrode, and the flow guide is grounded or connected to a negative pressure.

[0011] Preferably, a plurality of flow diversion channels are provided for evenly distributing the fluid to the flow guide surface.

[0012] Preferably, it also includes an air jet device which can control the direction of the jetted airflow to control the fibers spun from the spinning electrode to fly toward the guide surface.

[0013] Furthermore, the guide surface is perpendicular or inclined to the ground.

[0014] Preferably, the fluid collection container is a trough body with a grid installed inside.

[0015] Furthermore, the distance between the side opening and the guide surface is 50 mm to 800 mm.

[0016] Furthermore, the spinning electrode is a steel wire, a cylinder, a spiral structure or a lattice structure.

[0017] The flocculent nanofiber electrospinning device using the above technical solution has the following characteristics and beneficial effects: the flocculent fibers can be conveniently and massively crushed to make slurry, and then composited with other materials or devices by coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the flocculent nanofiber electrospinning device of the utility model;

[0019] Figure 2 for Figure 1 The side needle-free electrospinning device in;

[0020] Figure 3 for Figure 1 The side water flow receiving device in the figure; A represents the flow direction of the nanofibers;

[0021] In the figure: 01 - electrospinning device, 011 - spinning electrode, 012 - solution box;

[0022] 02——water flow receiving device, 021——diversion channel, 022——water flow collector;

[0023] 03——Grille sink;

[0024] 04——Jet device;

[0025] 05——water inlet; 06——nanofiber; 061——flocculated nanofiber; 07——air flow; 08——high voltage power supply. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0027] The utility model provides a device for electrostatic spinning of flocculent nanofibers using side needleless electrostatic spinning and a side water flow receiving device. The device consists of a rotatable needleless electrostatic spinning electrode, a side spinning solution box and a side metal water flow receiving device.

[0028] Reference Figures 1 to 3 As shown, the device is mainly composed of an electrospinning device 01, a water flow receiving device 02, a grid water tank 03 and an air jet device 04; wherein the electrospinning device 01 is a side-needleless electrospinning device, including one or more spinning electrodes 011 that can rotate or not rotate, and the electrode can be a steel wire, or a cylinder with a diameter ranging from 0.1 mm to 1000 mm, a spiral structure, and a metal or non-metal lattice structure. It applies a high voltage to the electrode through a high-voltage power supply 08, forming a potential difference with the grounded receiving device, thereby starting to electrospin nanofibers.

[0029] The solution box 012 of the side needle-free electrospinning device is open on the side, with one side being an opening and the other side being a shielding object. The solution box with a single-side opening can make the electrodes in the solution box stained with solvent on the surface only form a potential difference with the receiving devices grounded directly and diagonally on the other side from the direction of the opening.

[0030] The water flow receiving device 02 is a side water flow receiving device arranged at the adjacent end of the side opening of the solution box 012. Specifically, it includes a water flow collector 022 composed of a metal plate or multiple metal wires arranged side by side. The water flow collector is actually a guide device that guides the water flow along the surface of the metal plate or the metal wire to flow from top to bottom to the grid water tank 03. In addition, the metal plate or the metal wire is grounded, and the water flows through the upper water inlet 05, and then flows downward from the surface of the metal plate or the metal wire through multiple diversion channels 021.

[0031] When a potential difference is formed between the spinning electrode 011 to which high voltage is applied and the grounded water flow receiving device 02, the nanofiber 06 will be ejected toward the grounded metal end (i.e., the metal plate or metal wire). At the same time, driven by the downward water flow, it flows toward the water trough with a grid below (i.e., the grid water trough 03), and is intercepted at the grid and collected into nanofibers with a flocculent structure (flocculent nanofibers 061).

[0032] That is, the flocculent nanofiber electrospinning device of the utility model has a solution box 012 with a side opening, in which a spinning solution is placed and spun in cooperation with a rotating spinning electrode 011; a water flow collecting device (i.e., a water flow receiving device 02) for nanofibers is provided on one side of the solution box opening, and a shield is provided on the other side; a lateral jet device 04 for changing the direction of the fiber after the electrode is spun is provided in the solution box toward the collecting device, and the direction of the air flow ejected by the jet nozzle of the jet device 04 (see Figure 1The direction of the fibers spun from the spinning electrode 011 flying toward the nanofiber collecting device (i.e., the direction of the location of the water flow collecting device 02) is controlled by the arrow direction of the airflow 07 in the spinning electrode 011. The nozzle of the airflow jet device can be one or more.

[0033] The nanofibers 06 reach the collection device and, driven by the downward water flow, flow to the water tank equipped with a grid below. After being intercepted at the grid, they are collected into nanofibers with a flocculent structure (i.e., flocculent nanofibers 061 in the figure).

[0034] The solution box is a side opening, the opening faces the water flow collector at a direction of 0 to 160 degrees, and the distance from the collector is 50 mm to 800 mm. The solution box can hold one spinning electrode or multiple spinning electrodes for operation.

[0035] The water flow receiving device 02 on the side is composed of flowing water and a device connected to ground or negative voltage. The device connected to ground or voltage is a water flow collector 022 formed by a metal plate or a metal wire, and can also be a rotating (rotating body), a rolling device (rolling body) or a waterfall device. The water flows from top to bottom through the diversion device (referring to the water flow collector 022) after water injection; when a rotating device is used, the lower part of the rotating device can be immersed in a water tank, and the water is brought to the entire device through the rotating structure, thereby forming a so-called diversion device.

[0036] When the water flows downward along the surface of the water collector 022, the speed of the water flow is 0.01 to 10 meters per second. In addition, the metal plate constituting the water flow receiving device can be perpendicular to the ground or at an angle of 45-110 degrees to the ground; the metal wire constituting the water flow receiving device can be perpendicular to the ground or at an angle of 45-135 degrees to the ground, thereby ensuring that the water flow can flow along the surface of the metal plate or the metal wire.

Claims

1. A flocculent nanofiber electrospinning device, comprising a solution box containing a spinning solution, wherein a spinning electrode is provided in the solution box, characterized in that: The solution box is a side opening structure with one side blocked and the other side open; the side opening is opposite to a fiber collecting device, the fiber collecting device includes a metal flow guide, the metal flow guide has an exposed flow guide surface that can guide the fluid from a high position to a low position, the flow guide surface is opposite to the side opening of the solution box; the flow guide surface is connected to a fluid input channel, the lower end of the flow guide surface leads to a fluid collecting container, the fluid collecting container is provided with a grid or filter for intercepting or filtering flocculent nanofibers mixed in the fluid; a potential difference is formed between the spinning electrode and the metal flow guide.

2. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The guide member is a metal plate, a metal wire, a rolling body or a rotating body, and the relevant surface thereof forms the guide surface.

3. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The fluid is water flow, and the flow rate of the water flow is 0.01 to 10 meters per second.

4. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: A high voltage is applied to the spinning electrode, and the flow guide is grounded or connected to a negative pressure.

5. The flocculent nanofiber electrospinning device according to claim 1 or 3, characterized in that: A plurality of flow distribution channels are also provided to evenly distribute the fluid to the flow guide surface.

6. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The invention also includes an air jet device which can control the direction of the jetted airflow to control the fibers spun from the spinning electrode to fly toward the flow guide surface.

7. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The guide surface is perpendicular or inclined to the ground.

8. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The fluid collection container is a trough body with a grid inside.

9. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The distance between the side opening and the guide surface is 50 mm to 800 mm.

10. The flocculent nanofiber electrospinning device according to claim 1, characterized in that: The spinning electrode is a steel wire, a cylinder, a spiral structure or a lattice structure.

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