CN110735192A - -electrode-assisted disc type porous electrostatic spinning spray head assembly - Google Patents
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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Abstract
The invention relates to an electrode-assisted disc type porous electrostatic spinning nozzle assembly, which comprises a disc type porous spinning nozzle, wherein the disc type porous spinning nozzle mainly comprises a disc type spinning disc, a columnar flow channel and a protruding auxiliary electrode, the disc type spinning disc mainly comprises a coaxial hollow circular truncated cone and a hollow cylinder, the protruding auxiliary electrode mainly comprises a cylindrical electrode and a plurality of conical electrodes, the cylinders and the cylindrical electrodes are coaxial, the orthographic projections of all the conical electrodes are positioned in the orthographic projection of the cylindrical electrode, the disc type spinning disc is provided with a plurality of through holes, the shapes and the sizes of all the through holes are the same, the shapes and the sizes of all the conical electrodes are the same, the number of the through holes is equal to the number of the conical electrodes, the included angles between the extending directions of all the through holes and the central axis of the cylinders are theta 1, the included angles between the central axes of all the conical electrodes and the central axis of the cylinders are theta 2, and the theta 1 is equal to theta 2.
Description
Technical Field
The invention belongs to the technical field of electrostatic spinning devices, and relates to electrode auxiliary disc type porous electrostatic spinning nozzle assemblies.
Background
The electrostatic spinning method has been as the main way of preparing nano fiber owing to its controllable technological process, simple apparatus, spinning range , low cost and other features, and its principle is that polymer solution or melt is charged and deformed in high voltage electrostatic field to form suspended conic liquid drop in the end of the nozzle, and when the charge repulsion force on the liquid drop surface exceeds the surface tension, the polymer micro jet is jetted out fast on the liquid drop surface and the jet is stretched at high speed, volatilized and solidified in short distances and finally deposited on the receiving substrate to form polymer fiber.
Patent CN201910289923.6 discloses a melt electrostatic spinning method based on equidirectional reinforced composite electric field and its product, wherein or more auxiliary electrodes with the same direction as the original voltage are added between the melt electrostatic spinning nozzle and the receiving device, thereby enhancing the electric field strength in the area near the nozzle, the auxiliary electrodes of the device are circular ring, hollow cylinder or central perforated original plate, the electric field is concentrated in the center of the circular ring, hollow cylinder or central perforated original plate, the electric field strength around is small, and the device is suitable for electric field enhancement of single jet, but is not suitable for being applied to a single nozzle forming multiple jets around the circumference.
Patent CN201910197538.9 discloses combined auxiliary electrodes for inner conical surface electrostatic spinning nozzle, and patent US2016/0068999a1 discloses Melt Differential Electrospinning Device and Process, all of which are coaxially and vertically arranged above the nozzle through a plurality of layers of metal ring electrodes, so as to increase the electric field, the electric field is concentrated at the center of the circular ring, the electric field is suitable for the electric field enhancement of single jet flow, and the electric field is also not suitable for the single jet head forming a plurality of jet flows around the circumference.
Patent KR 2015005024620150409 discloses that Electro-spinning apparatus using electric field and method of manufacturing a transferred electrode using the same, which enhances the electric field strength by adding a metal ring electrode between the showerhead and the receiving substrate, the electric field of which is concentrated at the center of the ring, and is also only suitable for the electric field enhancement of a single jet.
The literature (Electric field analysis of spinning design for multiholeelectric systems [ J ]. Journal of Materials Science,2014,49(5): 1964-.
Therefore, it is very necessary to add an auxiliary electrode for electric field enhancement applicable to a plurality of jets in the electrospinning device.
Disclosure of Invention
The invention aims to solve the problem that an auxiliary electrode on an electrostatic spinning device in the prior art cannot be simultaneously suitable for electric field enhancement of a plurality of jet flows, and provides electrode auxiliary disc type porous electrostatic spinning nozzle assemblies.
In order to achieve the purpose, the invention adopts the following scheme:
kinds of electrode auxiliary disc type multi-hole electrostatic spinning nozzle assembly, including disc type multi-hole spinning nozzle, disc type multi-hole spinning nozzle mainly composed of disc type spinning disc, column flow channel and protruding auxiliary electrode;
the dish-shaped wire spraying disc mainly comprises a coaxial hollow round table and a hollow cylinder, and the protruding auxiliary electrode mainly comprises a cylindrical electrode and a plurality of conical electrodes;
the flow channel, the circular truncated cone, the cylinder, the cylindrical electrode and the conical electrode are sequentially arranged from bottom to top, the large end of the circular truncated cone is connected with the cylinder, the small end of the circular truncated cone is connected with the flow channel, the cylinder and the cylindrical electrode are coaxial, the orthographic projection of the cylindrical electrode is positioned in the orthographic projection of the cylinder, the height difference between the cylinder and the cylindrical electrode is 5-20 mm (the height difference between the cylinder and the cylindrical electrode is the vertical distance between the top of the cylinder and the top of the cylindrical electrode, if the height difference is too large, the distance for enhancing the jet flow flight action is reduced, the time for jet flow stretching is shortened), the orthographic projections of all the conical electrodes are positioned in the orthographic projection of the cylindrical electrode, and the;
the dish-shaped wire spraying disc is provided with a plurality of through holes, all the through holes have the same shape and size, all the cone electrodes have the same shape and size, the number of the through holes is equal to the number of the cone electrodes, the liquid outlets of all the through holes are arranged on the outer circumferential surface of the cylinder, all the through holes are arranged in an umbrella-shaped short-rib shape, the liquid inlets of all the through holes are arranged at the connecting end of the flow channel and the round platform, all the liquid outlets, all the liquid inlets and all the cone electrodes are uniformly distributed around the circumference of the central shaft of the cylinder, the extending directions of all the through holes are the same as the included angles of the central shaft of the cylinder and are theta 1, the included angles of the, the conical electrodes are symmetrically distributed by taking the cylinder as the center, so that the uniform distribution of the whole electric field is facilitated, theta 1 is equal to theta 2, the approach of the electric field lines to the flight path of the jet flow is facilitated, and the draft of the jet flow is enhanced.
In the prior art, a plurality of layers of metal ring electrodes are coaxially and vertically arranged above a nozzle so as to increase an electric field, or a metal ring electrode is additionally arranged between a spray head and a receiving base material so as to enhance the electric field intensity, the electric field is concentrated at the center of the ring and is only suitable for the electric field enhancement of a single jet flow, but cannot be simultaneously suitable for the electric field enhancement of a plurality of jet flows.
The electric field enhancement principle of the invention is as follows:
the top of the dish-shaped spinneret plate is provided with a raised auxiliary electrode, the dish-shaped multi-hole spinneret plate is connected with a high-voltage power supply in the spinning process, and the dish-shaped spinneret plate, the cylindrical electrode and the conical electrode can be regarded as being connected in series, so that the electric potentials are the same
(
Greater than 0), the receiving substrate is communicated with the ground through a wire, the electric potential is 0, electric fields E1 and E2 are formed between the dish-shaped spinning disk and the receiving substrate respectively, the electric field lines of E1 and E2 are in the same direction and are all in the direction of the receiving substrate, the distance between the convex auxiliary electrode and the receiving substrate is closer, and the convex auxiliary electrode is provided with a conical electrode, so that the E2 is greater than the E1, when the spinning solution flows out from the liquid outlet to form jet flow, the spinning solution is firstly under the action of the electric field E1 and is stretched and thinned under the action of the electric field force, when the jet flow flies over the plane where the top of the convex auxiliary electrode is located, the jet flow is under the combined action of the electric fields E1 and E2, and the jet flow enters to be stretched and thinned into nano fibers until the nano.
In addition, the invention achieves the purpose of controlling the diameter of the jet flow by controlling the liquid outlet speed and the included angle between the extending direction of all the through holes and the central axis of the cylinder, ensures the same liquid outlet quantity of all the through holes due to the same shape and size of all the through holes, further ensures the uniform distribution of the diameter of the fiber, and does not generate interference to the spinning jet flow because the invention controls the diameter of the jet flow by controlling related parameters rather than blowing. The specific mechanism is as follows:
the flow channel is positioned below the disc-shaped spinning disk, in the spinning process, spinning solution is uniformly distributed to a liquid inlet of each through hole through the flow channel, under the pushing of the pressure of the spinning solution, the spinning solution flows out from the liquid outlet of each through hole at an initial speed V to form jet flow, and is under the combined action of an electric field force Fe, a gravity force Fg, an inertia force Fp, a viscous force Fn, an air resistance Fa, a repulsion force Fc between the jet flows and a capillary force Fd, due to the adoption of a bottom-up spinning method, the resultant force F1 in the vertical direction is Fe + Fp multiplied by cos theta-Fn-Fa multiplied by cos theta-Fd-Fg, and the resultant force F2 in the horizontal direction is Fc + Fp multiplied by theta-Fa multiplied by sin theta, wherein theta is the included angle between the extending direction of all the through holes and the central axis of the cylinder. In the electrostatic spinning process, the spinning voltage is dozens of kilovolts or even hundreds of kilovolts, so that the jet plays a dominant role in the movement process of repulsion between electric field force and the jet, so that F1 is approximately equal to Fe, F2 is approximately equal to Fc, therefore, in the spinning process, the flying route of the solution flowing out of the through holes of the disc type multi-hole spinning nozzle can be approximately regarded as a parabola, the spinning jet flies along the parabola, the flying route S of the spinning jet is influenced by the speed V and the included angle theta between the extending direction of all the through holes and the central axis of the cylinder, and the spinning jet satisfies the relational expression:
wherein h is the distance from the nozzle to the receiving base material, m is the mass of the jet flow liquid drops, and the longer the distance of the path S is, the more sufficient the spinning jet flow is stretched, and the sufficient volatilization of the solvent is facilitated, so that the path S of the jet flow flying can be regulated and controlled by regulating and controlling V and theta in the spinning process, and the nano fibers with different diameters can be obtained. When V and theta are both minimum values, the flight path S of the jet flow is minimum at the moment, the jet flow is insufficient in stretching effect, and the diameter of the formed fiber is thick; when V and theta are both maximum, the flight distance S of the jet is maximum, the jet is fully stretched, and the diameter of the formed fiber is thinnest.
As a preferred technical scheme:
according to the kinds of electrode auxiliary disc type porous electrostatic spinning spray head assemblies, the cylindrical electrode extends downwards to the small end of the circular truncated cone and is connected with the small end of the circular truncated cone, and the diameter of the cylindrical electrode is the same as that of the small end of the circular truncated cone.
According to the electrode auxiliary disc type porous electrostatic spinning spray head assembly, the wall thicknesses of the hollow circular table and the hollow cylinder are uniform, namely the hollow part of the hollow circular table is in a circular table shape, the hollow part of the hollow cylinder is in a cylindrical shape, and the wall thicknesses of the hollow circular table and the hollow cylinder are 5-10 mm.
The electrode-assisted disc type porous electrostatic spinning nozzle assembly has the advantages that the number of the through holes is 8-100, the through holes are cylindrical, and the aperture of the through holes is 0.3-1.2 mm, the through holes are not limited to the cylindrical shape, the cylindrical shape is conventional and easy to process, so the through holes are preferred in the invention.
According to the kinds of electrode auxiliary disc type porous electrostatic spinning spray head assembly, the flow channel is in a hollow cylindrical shape, the outer diameter of the flow channel is equal to that of the small end of the circular truncated cone, and the wall thickness of the flow channel is 3-5 mm.
According to the kinds of electrode auxiliary disc type porous electrostatic spinning spray head assembly, the flow channel is sleeved with the insulating cover, and the disc-shaped spray head disc is positioned in the insulating cover.
The kinds of electrode auxiliary disc type porous electrostatic spinning spray head components, the insulation cover is shaped piece, composed of cylinder and round table cover, the cylinder is connected with the runner thread.
In the kinds of electrode-assisted disc-type porous electrostatic spinning nozzle assembly, the insulating cover is made of polyformaldehyde, polypropylene, polyethylene, polycarbonate, poly-p-phenylene terephthalamide, polyvinyl chloride or polyether ether ketone.
As for the electrode auxiliary disc type porous electrostatic spinning spray head components, the value range of theta 1 is more than or equal to 45 degrees and less than or equal to 90 degrees, if the included angle is more than 90 degrees, the through holes are inclined downwards, the spinning from bottom to top is not facilitated, and if the included angle is too small, the distance among the through holes is too close, and the number of the openable through holes is limited.
In the kinds of electrode-assisted disc-type multi-hole electrostatic spinning nozzle assembly, the disc-type multi-hole spinneret is a body-formed piece made of copper, aluminum, iron, copper alloy or aluminum alloy.
Has the advantages that:
(1) according to the electrode-assisted disc type porous electrostatic spinning nozzle assembly, the disc type porous spinneret avoids large-area contact of spinning solution with the environment, the phenomenon of unstable spinning caused by solvent volatilization is prevented, the used nozzle can be cleaned by air injection of a high-pressure air gun, the care is easy, and the production efficiency and the stability are improved;
(2) according to the electrode-assisted disc type porous electrostatic spinning nozzle assembly, in the spinning process, longitudinal electric fields which are circumferentially and symmetrically distributed are formed between the convex auxiliary electrodes and the receiving base material of the disc type porous spinneret, the electric fields formed at the peripheries are strong, and the electric fields formed at the middle positions are weak, so that the step drafting and refining of spinning multi-jet flow are facilitated.
Drawings
FIG. 1 is a schematic diagram of electric field lines formed by the electrode-assisted disc-type multi-hole electrospinning nozzle assembly of the present invention, wherein E1 and E2 are electric fields formed between the disc-shaped spinning disc, the protruding auxiliary electrode, and the receiving substrate, respectively;
FIG. 2 is a diagram illustrating the distribution of electric field intensity formed by the protruding auxiliary electrode according to the present invention;
FIG. 3 is a scanning electron microscope image (magnification is 20000 times) of a fiber membrane prepared by the electrode-assisted disc-type porous electrostatic spinning nozzle assembly of the present invention, wherein (a) no protrusion auxiliary electrode is added, and (b) protrusion auxiliary electrode is added;
FIG. 4 is a schematic diagram of an electrode-assisted disk-type multi-orifice spinning pack according to an embodiment of the present invention;
FIG. 5 is a schematic view of the dish multi-hole spinneret of FIG. 4;
FIG. 6 is a schematic view of the flow channels of the dish-type multi-hole spinneret of FIG. 4;
FIG. 7 is a schematic view of the insulating cover of FIG. 4;
wherein, 1-disc type multi-hole spinning nozzle, 2-insulating cover, 3-disc type spinning disc, 4-flow channel, 5-convex auxiliary electrode, 6-through hole, 7-cylinder and 8-cover body.
Detailed Description
The invention is further illustrated at in conjunction with the detailed description it is to be understood that these examples are intended only for the purpose of illustration and not as a definition of the limits of the invention.
an electrode-assisted disc-type multi-orifice electrospinning nozzle assembly, the assembly comprising a disc-type multi-orifice spinneret, as shown in FIG. 4;
a disc-type multi-hole spinneret 1, as shown in fig. 5, which is an -shaped product composed of a disc-shaped spinneret plate 3, a columnar flow channel and a raised auxiliary electrode 5, and is made of copper, aluminum, iron, copper alloy or aluminum alloy;
the dish-shaped wire spraying disc consists of a hollow round table and a hollow cylinder which are coaxial; the wall thickness of the hollow round table and the wall thickness of the hollow cylinder are uniform, the wall thickness is 5-10 mm, the outer diameter of the large end of the hollow round table is 25-100 mm, the outer diameter of the small end of the hollow round table is 15-90 mm, and the height of the hollow cylinder is 4-8 mm;
the flow channel 4 is in a hollow cylindrical shape, as shown in fig. 6, the outer diameter is equal to that of the small end of the circular truncated cone, and the wall thickness is 3-5 mm;
the insulating cover 2 is sleeved on the flow channel, as shown in figure 7, the dish-shaped spinneret plate is positioned in the insulating cover, the insulating cover is an -shaped part consisting of a cylindrical barrel 7 and a circular truncated cone-shaped cover body 8, and the barrel is in threaded connection with the flow channel;
the convex auxiliary electrode consists of a cylindrical electrode and a plurality of conical electrodes with the same shape and size; wherein the height of the conical electrode is 2-4 mm, and the radius of the bottom surface is 1-5 mm; the cylindrical electrode extends downwards to the small end of the circular truncated cone and is connected with the small end of the circular truncated cone, and the diameter of the cylindrical electrode is the same as that of the small end of the circular truncated cone;
the flow channel, the circular truncated cone, the cylinder, the cylindrical electrode and the conical electrode are sequentially arranged from bottom to top, the large end of the circular truncated cone is connected with the cylinder, the small end of the circular truncated cone is connected with the flow channel, the cylinder and the cylindrical electrode are coaxial, the orthographic projection of the cylindrical electrode is positioned in the orthographic projection of the cylinder, the height difference between the cylinder and the cylindrical electrode is 5-20 mm, the orthographic projections of all the conical electrodes are positioned in the orthographic projection of the cylindrical electrode, and the conical tops of all the conical electrodes are upward;
8-100 cylindrical through holes 6 with the same shape and size are arranged on the dish-shaped wire spraying plate, and the aperture of each through hole is 0.3-1.2 mm; the number of the through holes is equal to that of the conical electrodes; liquid outlets of all the through holes are arranged on the peripheral surface of the cylinder, liquid inlets of all the through holes are arranged at the connecting end of the runner and the circular truncated cone, and all the liquid outlets, all the liquid inlets and all the conical electrodes are uniformly distributed around the circumference of the central shaft of the cylinder; the included angles between the extending directions of all the through holes and the central axis of the cylinder are the same and are theta 1, and the value range of the theta 1 is more than or equal to 45 degrees and less than or equal to 90 degrees; the central axes of all the conical electrodes and the central axis of the cylinder form the same included angle theta 2, and theta 1 is equal to theta 2.
The electrode-assisted disc-type porous electrostatic spinning nozzle assembly is used for an electrostatic spinning test 1 of PAN spinning stock solution, and the disc-type porous spinning nozzle is connected with a high-voltage power supply in the spinning process due to the fact that the protruding auxiliary electrode is arranged at the top of the disc-type spinning disc, the disc-type porous spinning disc, the cylindrical electrode and the conical electrode can be regarded as being connected in series, so that the disc-type porous electrostatic spinning nozzle assembly has the same potential, namely
(
Greater than 0), the receiving substrate is connected with the ground through a lead, the potential of the receiving substrate is 0, so that electric fields E1 and E2 are respectively formed between the dish-shaped spraying disk, the convex auxiliary electrode and the receiving substrate, the directions of the electric field lines of E1 and E2 are the same (as shown in figure 1), and the electric fields are all directed to be connected with the receiving substrateIn the substrate receiving direction, because the distance between the convex auxiliary electrode and the receiving substrate is closer, and the convex auxiliary electrode is provided with a conical electrode, E2 is larger than E1;
in addition, the distribution of the electric field intensity formed by the protruding auxiliary electrode is as shown in FIG. 2 (FIG. 2 is the electric field intensity formed by the planes of any two conical electrodes symmetrical along the central axis), and the electric field intensity of the protruding auxiliary electrode is the maximum (5.0 x 10^ s)6V/m) is located around the circumference instead of the center and reaches a maximum at the axis of each conical electrode due to the smaller radius of curvature at the cone apex of the conical electrode according to the formula
Wherein t is the charge density, Q is the charge amount, and r is the curvature radius; it can be known that the smaller the curvature radius, the higher the charge density, the stronger the electric field formed, and therefore, the electric field intensity formed at the conical tip of the conical electrode is the largest;
and in the spinning process, the flying route of the solution flowing out of the through holes of the disc type multi-hole spinning nozzle can be approximately regarded as a parabola, the spinning jet flies along the path of the parabola, the flying route S of the spinning jet is influenced by the speed V and the included angle theta between the extending direction of all the through holes and the central axis of the cylinder, and the spinning jet satisfies the relational expression:
wherein h is the distance from the nozzle to the receiving substrate, and m is the mass of the jet droplets; therefore, the distance S of jet flow flight can be regulated and controlled by regulating and controlling V and theta in the spinning process, so that the nano fibers with different diameters can be obtained; when V and theta are both minimum values, the flight path S of the jet flow is minimum at the moment, the jet flow is insufficient in stretching effect, and the diameter of the formed fiber is thick; when V and theta are both maximum, the flight distance S of the jet is maximum, the jet is fully stretched, and the diameter of the formed fiber is thinnest.
The spinning process parameters of the test 1 are set as that the spinning voltage is 50kV, the spinning distance is 20cm, the temperature is 25 ± 2 ℃, the humidity is 60 ± 5%, V is 20mm/s, θ is 90 °, the obtained nanofiber membrane is subjected to the scanning electron microscope test, the result is shown in (b) of fig. 3, and the average diameter of the nanofiber membrane is 116nm and the standard deviation is 9 by using a measuring tool in the step ;
comparing the test 1 with the test 2, it can be seen that the average diameter of the fiber of the test 1 is smaller and the standard deviation is small, that is, the fiber distribution is uniform, the average diameter of the fiber of the test 1 is smaller because the E2 in the test 1 is larger than the E1, when the spinning solution flows out from the liquid outlet to form a jet flow, the spinning solution is firstly under the action of the E1 and is stretched and refined under the action of the electric field force, when the jet flow flies over the plane where the top of the convex auxiliary electrode is located, the jet flow is under the combined action of the E1 and the E2, the jet flow is further stretched and refined into the nano fiber by step until the nano fiber is finally received by the receiving substrate, and the test 2 does not contain the auxiliary electrode and does not have the action of E2, therefore, the jet flow only receives the action of the E1 in the whole process, the;
the reason that the fiber distribution of the experiment 1 is uniform is that the electric field intensity formed at the conical top of the conical electrode is the largest, and for the disc-type porous electrostatic spinning nozzle assembly, the formed electric field distribution is the circumferential electric field intensity and the middle is weak, and the electric field distribution rule is favorable for simultaneously enhancing the electric field intensity for forming multiple jet flows, so that the stretching and thinning of the multiple jet flows are more sufficient, the stretching effect on each jet flow is the same, and the diameter distribution of the multiple jet flow fibers in the experiment 1 is uniform;
comparing the test 1 with the test 3, the average diameter of the fiber of the test 1 is smaller, and the result proves that the disc-type porous spinneret assembly for electrostatic spinning can be used for an electrostatic spinning device with controllable jet flow, and the path of the spinning jet flow is regulated and controlled by regulating and controlling the speed V of the spinning solution and the inclination angle theta of the through holes, so that the nano fibers with different diameters are obtained; in addition, the standard deviation of the fiber diameter is 9 and 20 respectively, which shows that the production efficiency and the stability of the disc type porous spinneret assembly for electrostatic spinning are good;
therefore, in the electrode-assisted disc type porous electrostatic spinning nozzle assembly, in the spinning process, longitudinal electric fields which are symmetrically distributed in the circumferential direction are formed between the convex auxiliary electrodes and the receiving base material of the disc type porous spinning nozzle, the electric fields formed in the middle of the electric field strength formed in the circumferential position are weak, -step drafting and refining of spinning multi-jet flow are facilitated, and the path of the spinning jet flow can be regulated and controlled by regulating the speed V of the spinning solution and the inclination angle theta of the through holes, so that the nano fibers with different diameters can be obtained.
Claims (10)
1, electrode auxiliary disc type porous electrostatic spinning spray head components, which are characterized by comprising a disc type porous spinneret, wherein the disc type porous spinneret mainly comprises a disc type spinneret plate, a columnar flow channel and a raised auxiliary electrode;
the dish-shaped wire spraying disc mainly comprises a coaxial hollow round table and a hollow cylinder, and the protruding auxiliary electrode mainly comprises a cylindrical electrode and a plurality of conical electrodes;
the flow channel, the circular truncated cone, the cylinder, the cylindrical electrode and the conical electrode are sequentially arranged from bottom to top, the large end of the circular truncated cone is connected with the cylinder, the small end of the circular truncated cone is connected with the flow channel, the cylinder and the cylindrical electrode are coaxial, the orthographic projection of the cylindrical electrode is positioned in the orthographic projection of the cylinder, the height difference between the cylinder and the cylindrical electrode is 5-20 mm, the orthographic projections of all the conical electrodes are positioned in the orthographic projection of the cylindrical electrode, and the conical tops of all the conical electrodes are upward;
be equipped with a plurality of through-holes on the dish-shaped wire spraying dish, the shape and the size of all through-holes are the same, the shape and the size of all circular cone electrodes are the same, the quantity of through-hole equals the quantity of circular cone electrode, the liquid outlet setting of all through-holes is on cylindrical outer peripheral face, the inlet setting of all through-holes is on the connecting end of runner and round platform, all liquid outlets, all liquid inlets and all circular cone electrodes encircle cylindrical center pin circumference equipartition, the extending direction of all through-holes is the same with the contained angle of cylindrical center pin, all be theta 1, the center pin of all circular cone electrodes is the same with the contained angle of cylindrical center pin, all be theta 2, theta 1 equals.
2. The electrode-assisted dish type multi-hole electrospinning spray head assembly of claim 1, wherein the cylindrical electrode extends downward to and connects with the small end of the circular truncated cone, and the diameter of the cylindrical electrode is the same as that of the small end of the circular truncated cone.
3. The electrode-assisted disc type porous electrostatic spinning nozzle assembly according to claim 1, wherein the hollow circular truncated cone and the hollow cylinder have uniform wall thickness, the wall thickness of the hollow circular truncated cone and the hollow cylinder is 5-10 mm, the outer diameter of the large end of the hollow circular truncated cone is 25-100 mm, the outer diameter of the small end of the hollow circular truncated cone is 15-90 mm, the height of the hollow cylinder is 4-8 mm, the height of the conical electrode is 2-4 mm, and the radius of the bottom surface is 1-5 mm.
4. The kinds of electrode-assisted disc-type multi-hole electrostatic spinning nozzle assembly of claim 1, wherein the number of through holes is 8-100, the shape of the through holes is cylindrical, and the aperture of the through holes is 0.3-1.2 mm.
5. The electrode-assisted disc-type multi-hole electrostatic spinning nozzle assembly according to claim 1, wherein the flow channel is hollow cylindrical, has an outer diameter equal to that of the small end of the circular truncated cone, and has a wall thickness of 3-5 mm.
6. The electrode-assisted disc type multi-hole electrospinning nozzle assembly of claim 5, wherein the flow channel is sleeved with an insulating cover, and the disc-shaped spinneret plate is located in the insulating cover.
7. The electrode-assisted disc type multi-hole electrospinning nozzle assembly of claim 6, wherein the insulating cover is a shaped body formed piece consisting of a cylindrical barrel and a truncated cone shaped cover, and the barrel is in threaded connection with the flow channel.
8. The electrode-assisted dish-type multi-orifice electrospinning nozzle assembly of claim 7, wherein the insulating cover is made of polyoxymethylene, polypropylene, polyethylene, polycarbonate, poly (p-phenylene terephthalamide), polyvinyl chloride, or polyether ether ketone.
9. The electrode-assisted dish-type multi-orifice electrospinning spray head assembly of claim 1, wherein θ 1 is in the range of 45 ° to θ 1 ° to 90 °.
10. The electrode-assisted dished porous electrospinning spray head assembly of claim 1, wherein the dished porous spinneret is a body-formed piece made of copper, aluminum, iron, copper alloy or aluminum alloy.
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| DE102007027014A1 (en) * | 2007-06-08 | 2008-12-18 | Rainer Busch | Spinning nano- and micro-fibers, rapidly accelerates stratified polymers and polymer solutions whilst applying electrical field to modify physical- and surface properties |
| CN103668487A (en) * | 2013-12-05 | 2014-03-26 | 厦门大学 | Non-needle electrostatic spinning device |
| CN104060334A (en) * | 2014-05-30 | 2014-09-24 | 张家港市宏盛贸易有限公司 | Electrostatic spinning device |
| CN109208090A (en) * | 2017-07-03 | 2019-01-15 | 林峰 | A kind of Novel needle electrostatic spinning apparatus and its spinning process |
| CN107475785A (en) * | 2017-08-11 | 2017-12-15 | 东华大学 | A kind of electrostatic spinning apparatus and its application method of spinning solution curvature dynamic control |
| CN109097849A (en) * | 2018-09-28 | 2018-12-28 | 上海云同纳米材料科技有限公司 | Nanofiber generating device |
| CN109487348A (en) * | 2018-11-28 | 2019-03-19 | 青岛科技大学 | A kind of electrostatic spinning nozzle tip induced field strength enhancement device and method |
| CN110004502A (en) * | 2019-04-11 | 2019-07-12 | 上海工程技术大学 | Melt electrostatic spinning method and its product based on enhancing compound field in the same direction |
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