CN202000035U - Split type composite electrostatic spinning device - Google Patents

Abstract

The utility model provides an electrostatic spinning device for preparing micrometer/nanometer composite fibers, and particularly relates to a split type composite electrostatic spinning device which can be suitable for different composite electrostatic spinning. The split type composite electrostatic spinning device consists of a sealing cover, a core, a casing, outer spinning nozzles, inner spinning nozzles and a fixed sealing pad, wherein the casing is cylindrical, one of the outer spinning nozzles is mounted at one end of the casing, the other end of the casing is connected with the sealing cover, the core is mounted in the casing, the fixed sealing pad is embedded at one end provided with the outer spinning nozzle between the core and the casing, at least one inner spinning nozzle mounting hole is arranged on the core, and the inner spinning nozzles are mounted in the inner spinning nozzle mounting holes. The split type composite electrostatic spinning device solves the problem that in the prior art, an existing spinning device cannot be suitable for spinning of various composite electrostatic fibers in different kinds and different specifications and the existing spinning device is complicated in replacement, and the defect of difficulty in maintenance in the prior art is overcome.

Description

A split-type composite electrospinning device

technical field

The utility model relates to an electrostatic spinning device for preparing micro/nano composite fibers, in particular to a split composite electrostatic spinning device, in particular to a device adaptable to various composite electrostatic spinning.

Background technique

Common electrospinning is to inject the polymer solution into the capillary, and add high voltage to the polymer to form a high voltage electric field between it and the grounded receiving screen. When the magnitude of the electric field force is equal to the surface tension of the liquid or melt, the charged droplet is in equilibrium at the end of the capillary. With the increase of the electric field force, the droplet is elongated into a filament. Due to the instability of the interaction between the charges, the filament is in a conical motion state during the falling process, and is collected on the fiber receiving device in the form of non-woven fabric. .

However, the ordinary electrospinning method can generally only prepare fibers with a single material, and it is difficult to prepare composite fibers with one material wrapped with other materials, and it is also difficult to prepare micro/nano fiber tubes with a hollow structure. . In recent years, a new electrospinning method—composite electrospinning has attracted extensive attention because it can prepare multicomponent or hollow fibers. Several materials are wrapped in one material or a composite fiber with a skin-core structure, because of its multiple components, in multifunctional fibers, drug release, micro/nano wires, flame retardant, antibacterial, antistatic, UV protection, anti Electromagnetic shielding and other aspects have great application prospects. Moreover, the pore size of the micro/nano fiber tube prepared by composite spinning is smaller, and it has an irreplaceable role in functions such as filtration and disinfection, chemical catalysis, and substance (hydrogen) storage; the use of composite electrospinning technology to prepare carbon Nanotubes are also receiving increasing attention. In recent years, patents related to coaxial or composite electrospinning devices have been published successively. For example, ZL200320122276.4 relates to coaxial electrospinning devices, and 200710062722.X mentions multi-fluid composite electrospinning devices. However, in the devices involved in these patents, generally speaking, the number of inner spinneret needles in a set of devices is fixed. If the number of inner spinneret needles or the distance and distribution thereof between the inner spinneret heads are to be changed, it is necessary to Replacing the entire device requires more difficult processing and higher processing costs, and the inability to disassemble the device brings inconvenience to cleaning and difficult maintenance.

Contents of the invention

The purpose of this utility model is to provide an electrospinning device for preparing micro/nano composite fibers, especially a split-type composite electrospinning device, specifically a device that can adapt to various composite electrospinning . The utility model solves the problem that the prior art cannot adapt to multi-variety and multi-standard composite electrospinning and device replacement is cumbersome, and makes up for the deficiency of the prior art that maintenance is difficult. The electrostatic spinning device of the present utility model is a device with a core-shell split design. On the one hand, it can effectively meet the requirement of keeping the distance between the inner spinning needles constant when the distance between the inner spinning needles and the outer spinning nozzles is adjusted arbitrarily. On the other hand, the device is easy to process, and the disassembly, cleaning, replacement and maintenance of the device are very simple.

A split-type composite electrostatic spinning device of the present invention is composed of a sealing cover, a core body, a shell, an outer spinneret, an inner spinneret and a fixed sealing gasket. The other end of the shell is connected with a sealing cover, the core body is installed in the shell, a fixed gasket is lined between the core body and the outer spinneret end of the shell, and there is at least one inner spinneret installation hole on the core body. The inner spinneret is installed in the inner spinneret installation hole of the core body.

As a preferred technical solution:

Wherein, in the split-type composite electrospinning device as described above, the central axis of the core body and the central axis of the shell are on the same straight line; the central axis of the core body and the central axis of the outer spinneret On the same straight line; that is, the central axes of the core body, the shell and the outer spinneret are all on the same straight line. The material of the core body, the shell, and the sealing cover can be plastic, inorganic non-metal, or other metals such as stainless steel, and the inner spinneret and the outer spinneret are made of stainless steel or other conductive materials. The outer diameter of the shell is 12-30mm, the height is 15-40mm, and the shell tube thickness is 4-8mm. The aperture of the inner spinneret is 0.3-1.6mm, and the aperture of the spinneret is 1.0-3.0mm.

As for the above split-type composite electrospinning device, the shell is cylindrical, and the core is cylindrical. The outer diameter of the core is smaller than the inner diameter of the shell, and the height of the core is about 0.1-10mm higher than the depth of the shell.

In the above-mentioned split-type composite electrospinning device, the core body and the shell have anti-rotation and position-limiting structures. It prevents the core body, the fixed sealing gasket and the shell from shifting when the core is fixed, changing the distribution of the inner spinning needle or damaging the inner spinning needle and the fixing sealing gasket.

In the split-type composite electrospinning device described above, the anti-rotation limiting structure is that there is a protruding block on the outer surface of the core, and a concave bayonet is provided at the corresponding position of the shell. After assembly, the protruding block of the core body is stuck in the in the bayonet of the housing. The protruding block can be closely combined with the bayonet without misalignment.

A split-type composite electrospinning device as described above, at least one inner spinneret installation hole on the core body means that there are 1 to 4 inner spinneret installation holes on the core to install the inner spinneret The inner diameter of the hole is equivalent to the outer diameter of the inner spinneret. Single-hole core body, the hole can be in the middle of the core body to prepare coaxial fibers, or it can deviate from the center to form eccentric fibers, or even make the outer wall of the inner spinneret tangent to the inner wall of the outer spinneret to form an inner spinneret. The spinneret does not completely cover the fibers of similar side-by-side structure in the outer spinneret. The positions of the holes in the core can be changed according to actual needs.

As for the split-type composite electrospinning device described above, when the number of installation holes of the inner spinneret is more than two, the distribution thereof is arranged in a regular polygon. Of course, the distribution of the inner spinneret needles is not necessarily a regular regular triangle or square, and various irregular arrangements are possible according to the needs of the fibers to be prepared.

For a split-type composite electrospinning device as described above, when the number of installation holes of the inner spinneret is more than one, after being installed in the core body, part or all of the outer wall of the inner spinneret can be formed with the inner wall of the outer spinneret. Inner-cut structure, preparing fibers in which the inner spinneret is not completely covered in the outer spinneret, which is similar to the juxtaposed structure.

As for the above-mentioned split-type composite electrospinning device, when the number of installation holes of the inner spinneret is more than one, part or all of the inner spinneret and the inner wall of the outer spinneret can be kept at a certain distance to prepare a Fibers are coated with one or more components.

A split-type composite electrospinning device as described above, the fixed sealing pad is circular, and the sealing pad has holes corresponding to the installation holes of the spinneret in the core, and the size of the holes is the same as the outer diameter of the inner spinneret. quite. The outer diameter of the fixed sealing gasket is about 1 mm smaller than the inner diameter of the housing, and the material is plastic, such as tetrafluoroethylene, etc., and the thickness is 0.5-1.5 mm.

According to the split-type composite electrospinning device described above, the other end of the housing is connected with a sealing cover, and the connection between them is by thread.

The utility model comprises components such as a sealing cover, a core body, a shell, an outer spinning needle, an inner spinning needle, a fixed sealing gasket and the like. Wherein, the central axis of the core body and the axis of the outer spinneret are on the same straight line. The inner spinnerets control the number, inner and outer diameters and distribution of inner spinnerets through the core body; the inner spinnerets are arranged in parallel, and after selecting a certain core body and outer spinnerets, the distance between the inner spinnerets , The distance between the inner spinneret and the outer spinneret is also fixed, and the distance from the inner spinneret to the outer spinneret can be adjusted separately without being affected by each other; there are two protruding parts on the outer upper end of the core body, The protrusion can fit precisely into the groove of the housing part. This design can ensure that when the sealing cap is tightened, the mutual displacement between the core body and the fixed sealing gasket will not be caused to affect the distribution of the inner needles; the inner and outer diameters of the outer spinneret can be changed according to specific conditions. In the process of installing the spinning assembly, first pass the inner spinning needle through the core body and pass through the matching fixed gasket, then place the above components in the casing, and screw on the sealing cover. At this time, the sealing The cap is screwed on too tightly. After installing the outer spinneret, adjust the distance from the inner spinneret to the outer spinneret and then tighten the sealing cap.

Select one or more kinds of internal liquids and select suitable external liquids. The same internal liquid can be propelled by one syringe pump, and different internal liquids can be propelled by different syringe pumps. Connect the lower end of the outer spinneret of the composite electrospinning spinneret to the high-voltage generating device, adjust the distance of the inner spinneret protruding from the outer spinneret and the advancing speed of the inner and outer liquids, so that the inner and outer liquids in the composite Taylor cone It is advisable that the spinning solutions do not contact or mix with each other when they reach the spinning point. Adjust the voltage so that the droplets overcome the surface tension under the action of a high-voltage electric field to form jets, and form fibers after solidification, which are received on the collecting device that is grounded under the spinneret. The obtained composite electrospun fibers can be dissolved or treated at high temperature to remove internal fibers to obtain micro/nanotubes, and composite micro/nanofibers with a tubular shape can also be obtained. A split-type composite electrospinning device of the present invention is a device with a core-shell split design. On the one hand, it can effectively meet the requirements of the inner spinneret when the distance between the inner spinneret and the outer spinneret is adjusted arbitrarily. The distance between them remains constant. On the other hand, the device is easy to process, and the disassembly, cleaning, replacement and maintenance of the device are very simple.

1. The whole device is divided into two parts, the shell and the core, and the disassembly, cleaning and assembly of the device are very easy to operate.

2. As long as the core body is changed, the number of inner spinneret needles can be changed, and the replacement is very convenient.

3. There are holes at certain intervals on the core body, which are equivalent to the outer diameter of the inner spinneret, which can well ensure that the distance between the inner spinneret remains constant, and the outer spinneret and the inner spinneret The distance between them can be kept constant. The core also plays the role of fixing the constant distance between the inner spinneret, so there should not be too much space between the hole on the core and the inner spinneret, otherwise the inner spinneret will loosen during other adjustments This results in a change in the distance between the inner spinneret tips.

4. Change the distance and distribution between the inner spinneret needles by changing the type of core body, and the distribution can be regular geometric shape or irregular shape. Similar side-by-side fibers or coated fibers can be prepared.

5. The hole diameters of the inner spinnerets can be the same or different, which can be changed according to specific requirements.

6. The aperture of the outer spinneret can be changed by replacing the outer spinneret, so that the appropriate outer spinneret can be selected and replaced according to the viscosity and surface tension of different outer spinnerets. Composite electrospinning has a lot to do with the viscosity, surface tension, and conductivity of the spinning solution. If the selected spinning solution has a high viscosity, you must choose a relatively larger diameter of the outer spinneret, otherwise the spinning solution will It cannot flow out or the impetus must be very strong. If the viscosity is small or the surface tension is small, an outer spinneret with a smaller hole diameter should be selected.

A split-type composite electrostatic spinning device of the utility model can conveniently prepare single-core or multi-core composite fibers. Moreover, the spinneret is easy to disassemble and easy to clean, and can be used in mass production devices of micro-nano composite fibers.

Beneficial effect:

The utility model has the advantages: 1. The composite electrostatic spinning spinneret device can change the number, size, distribution and other parameters of the inner spinneret by changing the core body inside the spinning needle, and the variety is easy to replace, and is suitable for many 2. The electrospinning device has the advantages of convenient processing, easy installation and disassembly.

Description of drawings

Fig. 1 is a structural representation of the utility model

Fig. 2 is a schematic sectional view of the shell of the utility model

Fig. 3 is a schematic cross-sectional view of the core body of the present utility model

Figure 4 is a schematic top view of a single-hole core

Figure 5 is a schematic top view of a dual-hole core

Figure 6 is a schematic top view of a three-hole core

Figure 7 is a schematic cross-sectional view of the outer spinneret of the present invention

1 is the sealing cover 2 is the outer spinneret 3 is the inner spinneret 4 is the core 5 is the shell

6 is the fixed gasket

Detailed ways

Below in conjunction with specific embodiment, further elaborate the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

A kind of split-type composite electrospinning device of the present utility model, as shown in Figure 1, is made up of sealing cover 1, core body 4, shell 5, outer spinneret 2, inner spinneret 3 and fixed gasket 6, The shell 5 is cylindrical, one end of the shell 5 is installed with an outer spinneret, the other end of the shell 5 is connected with a sealing cover 1, the core 4 is installed in the shell 5, the core 4 and the outer spinneret end of the shell 5 are installed A fixed gasket 6 is lined between them, and there is at least one inner spinneret installation hole on the core 4 , and the inner spinneret 3 is installed in the inner spinneret installation hole of the core 4 .

Wherein, in the split-type composite electrospinning device described above, the central axis of the core body and the central axis of the outer spinneret are on the same straight line.

In the split-type composite electrospinning device described above, the shell 5 is cylindrical (as shown in FIG. 2 ), and the core 4 is cylindrical (as shown in FIG. 3 ).

In the split-type composite electrospinning device described above, the core 4 and the shell 5 have anti-rotation and position-limiting structures.

In the above-mentioned split-type composite electrospinning device, the anti-rotation limiting structure is that the outer surface of the core body 4 has a protruding block, and the corresponding position of the shell 5 has a concave bayonet. After assembly, the protrusion of the core body 4 Block out is stuck in the bayonet of shell 5.

In the split-type composite electrospinning device described above, at least one inner spinneret installation hole on the core 4 means that there are 1 to 4 inner spinneret installation holes on the core 4 . Single-hole core body, the hole can be in the middle of the core body (as shown in Figure 4), and can also deviate from the center (eccentric structure), or even make the outer wall of the inner spinneret 3 and the outer wall of the outer spinneret 2 The inner wall forms an inscribed structure.

As for the split-type composite electrospinning device described above, when the number of installation holes of the inner spinneret is more than two, the distribution thereof is arranged in a regular polygon. The distribution of the inner spinning needles 3 is not necessarily regular triangle or square. FIG. 6 is a schematic top view of a three-hole core body. There are three inner spinneret mounting holes distributed in an equilateral triangle on the core body 4 for installing the inner spinneret 3 .

In a split-type composite electrospinning device as described above, when the number of installation holes for the inner spinneret is greater than one, the inner spinneret 3 is installed behind the core body, and part or all of the outer walls of the inner spinneret 3 can be It forms an inscribed structure with the inner wall of the outer spinneret 2, and is used to prepare fibers in which the inner spinneret liquid is not completely covered in the outer spinneret liquid and is similar to a side-by-side structure.

As described above, when the number of installation holes of the inner spinneret is more than one, the inner spinneret 3 and the outer spinneret 2 are kept at a certain distance to prepare a fiber coated with a Coated fibers of one or more components.

In the split-type composite electrospinning device described above, the connection of the other end of the housing 5 to a sealing cover 1 adopts a threaded connection.

Fig. 5 is a schematic top view of a double-hole core.

Fig. 7 is a schematic cross-sectional view of the outer spinneret of the present invention. The side of the outer spinneret is designed with an infusion tube for inputting the outer spinneret liquid. The upper part of the outer spinneret 2 has an external thread matched with the shell 5 . The aperture of the outer spinneret mentioned in this patent refers to the aperture of the lower portion of the outer spinneret 2 .

Claims (9)

1. split type composite electrostatic spinning device, it is characterized in that: form by seal cover, core body, shell, outer spinning head, interior spray silk syringe needle and fixing seal pad, shell is tubular, one end of shell is installed an outer spinning head, the other end of shell connects a seal cover, and core body is installed in the shell, and core body and shell are installed between the outer spinning head end and be lined with the fixing seal pad, spray silk syringe needle installing hole at least one is arranged on the core body, and interior spray silk syringe needle is installed in the interior spray silk syringe needle installing hole of core body.

2. a kind of split type composite electrostatic spinning device as claimed in claim 1 is characterized in that the central axis of described core body and the central axis of shell are on same straight line; The central axis of described core body and the central axis of outer spinning head are on same straight line.

3. a kind of split type composite electrostatic spinning device as claimed in claim 1 is characterized in that described shell is cylindrical, and core body is cylindrical.

4. as claim 1 or 3 described a kind of split type composite electrostatic spinning devices, it is characterized in that described core body and shell have the anti-rotation limiting structure.

5. a kind of split type composite electrostatic spinning device as claimed in claim 4 is characterized in that described anti-rotation limiting structure is that core outer surface has the protrusion piece, and the shell correspondence position has the bayonet socket of depression, and the protrusion piece of assembling back core body is stuck in the bayonet socket of shell.

6. a kind of split type composite electrostatic spinning device as claimed in claim 1 is characterized in that, has at least one interior spray silk syringe needle installing hole to be meant on the described core body spray silk syringe needle installing hole in 1～4 is arranged on the core body.

7. as claim 1 or 6 described a kind of split type composite electrostatic spinning devices, it is characterized in that, described in spray silk syringe needle installing hole quantity during greater than two, it is distributed as regular polygon and arranges.

8. as claim 1 or 6 described a kind of split type composite electrostatic spinning devices, it is characterized in that, described in spray silk syringe needle installing hole quantity during greater than one, some or all of in spray silk syringe needle outer wall tangent with outer spinning head inwall.

9. a kind of split type composite electrostatic spinning device as claimed in claim 1 is characterized in that, the other end of described shell adopts threaded connection mode to connect a seal cover.

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