CN109913958A - Electrospinning fibre sprays environment resultant field wind field control device - Google Patents
Electrospinning fibre sprays environment resultant field wind field control device Download PDFInfo
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Abstract
Electrospinning fibre sprays environment resultant field wind field control device, belong to electrospinning field, in order to solve the control to electrified jet motion profile, the problem of improving the quality of efficiency and spinning fibre that spinning fibre is collected, wherein rotary bellows, magnet exciting coil and magnetic case arranged in co-axial alignment cylindrical, rotary bellows are in innermost layer, and magnet exciting coil is in middle layer, and magnetic case is in outermost layer；The lower part of rotary bellows connects round sliding rail, and the round sliding rail vertically connects bearing, round sliding rail servo axis is forwarded dynamic；Joining device of conveyer belt makes the servo-actuated rotation of rotary bellows to bearing transmission rotation, and effect is so that the rotation of injection stream has certain controllability and regularity.
Description
Technical field
The invention belongs to electrospinning fields, are related to a kind of electrospinning fibre injection environment resultant field wind field control device.
Background technique
In recent years, the research of nano material became a hot issue, prepared nanofiber by electrostatic spinning technique
Material is one of most important academic and technical activity of world's material science and technology field in recent ten years, both at home and abroad for quiet
Electrospinning has carried out in-depth study.With traditional separation compared with stretching mode, electrostatic spinning is with the letter of its manufacturing device
List, cost of spinning is cheap, it is various to spin substance classes, technique is controllable, has what is become apparent to have in the extraction of nanofiber
The advantages that effect property, it has also become effectively prepare one of main path of nano-fiber material.The forming process of electrostatic spinning are as follows: poly-
It is subject to sufficiently large high-pressure electrostatic on polymer solution, polymer dropping liquid is enable to generate injection when with material surface contact
Stream.The stretched refinement of these threads is deposited on body surface and forms nanofiber at the same time by bending, solidification process
Film.In the electrospinning process, the state-variable for influencing electrospun fibers pattern and property is mainly the stream of polymer solution
Three bulk properties, spinning technology parameter and environmental parameter aspects, the fluid behaviour of polymer solution is mainly the opposite of solution
The characterisitic parameters such as molecular mass, relative molecular mass distribution, the viscosity of polymer solution, conductivity, surface tension；Spinning technique
Parameter be mainly Polymer Solution concentration, the flow rate of electrostatic spinning fluid, electric field and magnetic field strength, capillary spinning nozzle with
The distance between collecting board collects board status；Environmental parameter is mainly temperature and speed air flow of spinning processing environment etc.,
Above-mentioned parameter all plays decisive role to electrostatic spinning process process.In actual production, the instability of injection stream causes
Drop point of the fiber on collecting board has randomness, causes certain difficulty to fiber is collected.In order to improve the production efficiency,
Carrying out electrostatic spinning using multiple nozzles simultaneously is a research hotspot, has multiply injection stream to spray simultaneously from different spinning nozzles
Out, the same collecting board is fallen on.Injection stream itself has unstable swing characteristic, leads to that shadow can be generated between injection stream
It rings, intermeshes between per share injection stream, the fiber distribution being collected into has arbitrariness.
Summary of the invention
In order to solve the control to electrified jet motion profile, efficiency that spinning fibre is collected and spinning fibre are improved
The problem of quality, the following technical solutions are proposed by the present invention:
A kind of electrospinning fibre sprays environment resultant field wind field control device, mainly by magnetic case, magnet exciting coil, control panel, same
Motor, round sliding rail, bearing, device driving motor, rotary bellows, joining device of conveyer belt composition are walked, wherein rotation type wind
Case, magnet exciting coil and magnetic case arranged in co-axial alignment cylindrical, rotary bellows exist in innermost layer, magnet exciting coil in middle layer, magnetic case
Outermost layer；The lower part of rotary bellows connects round sliding rail, and the round sliding rail vertically connects bearing, enables round sliding rail
Servo axis is forwarded dynamic；Joining device of conveyer belt makes the servo-actuated rotation of rotary bellows to bearing transmission rotation；Synchronous motor is placed in magnetic
Excitation exciting current is provided outside case and for magnet exciting coil, magnetic upper box part and lower part have round hole, the line mistake of magnet exciting coil
Round hole is connect with control panel.
Further, the first conveyer belt is centered around in the lower part fluting of rotary bellows, and the transmission band connection is simultaneously
It is driven by device driving motor to form transmission rotation, makes the servo-actuated rotation of rotary bellows.
Further, magnetic upper box part has symmetrical rectangular opening, entrance and outlet for the second conveyer belt, and described second
Conveyer belt crosses rectangular opening, and is centered around in the fluting of rotation type wind upper box part, and described second transmits band connection and by device
Driving motor driving makes the servo-actuated rotation of rotary bellows to form transmission rotation.
Further, further include Wind Direction Tablet, rotary bellows, magnetic case are made of nonmetallic materials, rotary bellows be by
The annulus column construction of two semicircle annulated columns composition, interior surface thereof are the groove of proper alignment for fixing Wind Direction Tablet, wind direction
Piece is fixed on the shaft in inner bellows surface groove, is used to form stable space wind field.
Further, electrospinning container, injection syringe needle, collecting board, electrospinning container placement platform, conveyer belt, appliance stand, it is described
Appliance stand to device support and connect with bearing, the electrospinning container placement platform is placed near appliance stand, and general
The electrospinning container is suspended on the top of arranged in co-axial alignment cylinder, and corresponding with collecting board, and electrospinning container has injection syringe needle.
Further, magnet exciting coil is divided into upper and lower two layers, and lower layer provides the magnetic field bigger than upper layer.
Further, appliance stand is made of Titanium-magnesium alloy material.
Further, it collects plate surface and is covered with one layer of tinfoil for collecting electrospinning fibre.
Further, the exciting current size and control synchronous motor that control panel is used to that synchronous motor to be selected to provide
Operation.
Further, electrospinning container position is put and adjusted to electrospinning container placement platform, and injection syringe needle is in magnet exciting coil circle
At the heart.
The utility model has the advantages that the electrostatic spinning process that the device is controlled by magnetic field, to control the motion process of injection stream, magnetic field
Distribution directly the control effect of spinning process is had an impact.When electrostatic spinning process starts, by controlling synchronous motor,
Make to generate exciting current in magnet exciting coil, further generate space magnetic field, injection stream falls on collecting board by magnetic field.With it is traditional
Electrostatic spinning process is compared, and magnetic field acts on the injection stream of electrification during introducing the electrostatic spinning in magnetic field, the movement of injection stream
Behavior and micromorphology can all change, predominantly the following aspects: after introducing magnetic field, injection stream is promoted it by one
The active force of rotation, injection stream still make rotating motion around the axis of spinning nozzle, and rotary motion at this time is in centripetal Lip river
It is carried out under the guidance of Lun Zili, so that the rotation of injection stream has certain controllability and regularity；Externally-applied magnetic field is to spray
Jet stream has active force, the main active force for generating both direction: radial direction and axial direction.The active force of radial direction promotes
The radius of turn of injection stream reduces, and the active force of axial direction promotes to move downward, and has further functioned as stable injection stream rotation
The effect of movement；After introducing magnetic field, the amplitude of fluctuation of injection stream reduces, and corresponding loss of energy reduces, and promotes the fortune of injection stream
Dynamic speed further increases, and fibre diameter accordingly reduces；After introducing magnetic field, under the action of Lorentz force, inside injection stream
The further orientations of macromolecular chain arrange even closer orderly.In addition, driving motor drives rotation during electrostatic spinning
Rotatable bellows uniform rotation, bellows rotation drive Wind Direction Tablet to generate stable space wind field, further improve spinning process spray
The stability of jet stream movement.
Detailed description of the invention
Fig. 1 is the amplitude of fluctuation schematic diagram of injection stream under different condition；Fig. 1 (a) is under conditions of no magnetic field, without wind field
The amplitude of fluctuation of injection stream, Fig. 1 (b) are to have magnetic field, the amplitude of fluctuation without injection stream under conditions of wind field, and Fig. 1 (c) is to have magnetic
Field, the amplitude of fluctuation for having injection stream under conditions of wind field；
Fig. 2 is strand arrangement schematic diagram；Fig. 2 (a) is molecular chain orientation arrangement, and Fig. 2 (b) is fibrous inside macromolecular chain segment
Arrangement；
Fig. 3 is device overall structure figure；
Fig. 4 is rotation type wind box structure figure；
Fig. 5 is rotary bellows perspective view；
Fig. 6 is device diagrammatic top view.
Specific embodiment
The present invention is a kind of electrospinning fibre injection environment resultant field wind field control device.Pass through succinct, practical machinery
Structure design, during magnetic field is introduced into electrostatic spinning, is realized with lower cost to electrified jet motion profile
Control greatly improves the efficiency of spinning fibre collection and the quality of spinning fibre.
For the electrospinning fibre injection environment resultant field wind field control device device by magnetic case 1, magnet exciting coil 2 synchronizes electricity
Machine 3, appliance stand 4, round sliding rail 5, device driving motor 6, rotary bellows 7, Wind Direction Tablet 8, electrospinning container 9 spray syringe needle
10, collecting board 11 controls the space of a whole page 12, and electrospinning container placement platform 13, conveyer belt 14, motor fixed rack 15, which waits, partially to be formed.
Wherein magnetic case 1 is tubular structure, is a kind of high-molecular compound material as made of methyl methacrylate polymerization,
The material has many advantages, such as the preferable transparency, chemical stability, mechanical property, weatherability and easy to process.Two above and below magnetic case
Respectively there are two the circular hole that diameter is 3cm, magnet exciting coil 2 can be connected by the cavity with the control space of a whole page 12 in portion.In magnetic
The symmetrical place of upper box part has rectangle cavity to be mainly used for rotary bellows connection conveyer belt.
Magnet exciting coil 2 divides for upper layer and lower layer, cylindrical to be coaxially arranged closely in inside cabinet 1, is mainly at the middle and upper levels
Device is provided compared with small magnetic field, and lower layer is mainly that device provides larger magnetic field.
Synchronous motor 3 is placed in outside magnetic case 1, is mainly responsible for and is provided excitation exciting current for magnet exciting coil, is allowed to generate empty
Between magnetic field, change electrostatic spinning process during injection stream stress condition.
Appliance stand 4 is made of Titanium-magnesium alloy material, and it is many to have that specific strength is high, density is small, corrosion-resistant, recyclable etc.
Advantage.Appliance stand 4 is fixed on charging floor, connect with round sliding rail 5, is mainly used to supporting box.
Round sliding rail 5 is placed in 7 bottom of magnetic case 1 and rotary bellows, is connected by conveyer belt with device driving motor, main to use
In support magnetic case and rotary bellows, and bellows is driven to rotate, forms space wind field.
Device driving motor 6 is stepper motor, is mainly responsible for the rotary bellows rotation of driving.
It is nonmetallic materials identical with 1 material of magnetic case that material, which is made, in rotary bellows 7, can reduce external factor to magnetic field
Interference.The annulus column construction that rotary bellows 7 are made of two semicircle annulated columns is placed in 2 spatial surface of magnet exciting coil, point
For upper and lower two parts, middle and upper part is groove design, and for putting conveyer belt 14, rotary bellows and magnetic case 1 are whole in ring
Shape column structure, interior surface thereof are the groove design of proper alignment, are mainly used for fixed Wind Direction Tablet 8.
Wind Direction Tablet 8 is polythene material, has many advantages, such as that at low cost, easy processing, chemical property are stablized, Wind Direction Tablet 8 is more
Kind specification rectangular configuration, size can require to choose, be fixed in inner bellows surface groove and turn according to bellows size and technique
On axis, it is used to form stable space wind field.Used Wind Direction Tablet can Reusability through over cleaning and drying.
Electrospinning container 9 is responsible for accommodating various electrospun solutions.
Syringe needle 10 is sprayed, electrospun solution sprays under the action of pressure and electric field from injection syringe needle, and the diameter of the syringe needle can
Experimental demand and replace.
11 surface of collecting board is covered with one layer of tinfoil, is mainly used for collecting electrospinning fibre.
The control space of a whole page 12 is mainly used for the exciting current size for selecting synchronous motor to provide and controls the fortune of synchronous motor
Row.
Electrospinning container placement platform 13 is mainly responsible for storing and adjusts electrospinning container position, makes during the spinning process, ejector pin
First 10 can be at magnet exciting coil the center point, guarantee the stable motion of injection stream in spinning process.
Conveyer belt 14 is mainly responsible for connection driving motor and round sliding rail.
Specific technology contents:
Injection syringe needle and collecting board form generating positive and negative voltage in conventional electrospinning fibre experimental provision, charge electrospun solution from syringe needle
In eject, fall on collecting board, due to electrostatic spinning process have unstability, result in during the spinning process be easy
The consequences such as existing fibre structure is uneven.A kind of electrospinning fibre injection environment resultant field wind field control device is by magnetic case, excitation wire
Circle, synchronous motor, appliance stand, round sliding rail, device driving motor, rotary bellows, the part such as Wind Direction Tablet form.Wherein magnetic
Case and rotary bellows be for the nonmetallic materials of macromolecule chemical combination, with it is at low cost, easy to process, have it is good close
The advantages that envelope property, can cross the cylindrical space of range request customization sizes according to electrostatic spinning process.Simultaneously compared with metal material
Material, nonmetallic materials also greatly reduce interference of the other factors to magnetic field, it is ensured that the stability in magnetic field.Wherein rotation type wind
Case is two semicircle Ring-cylindricals, and one end is connected by hinge 71, and the other end is connected the annulus column construction formed by block button 72,
The structure is divided into two parts up and down, the wind field of different location can be selected to be operated according to different spinning technique demands.Bellows
Upper grooves are connected with driving motor by conveyer belt, and driving motor drives the rotation of bellows top to generate space wind by coaxial shaft
?；Bellows lower part is connected with round sliding rail, wherein round sliding rail and be connected by conveyer belt with driving motor, driving motor drive
The rotation of rotation type wind lower box part generates space wind field.Synchronous motor can provide exciting current for magnet exciting coil, adjust exciting current
Size, less, but magnetic field strength changes, with the increase of exciting current, magnetic for the space distribution situation variation in magnetic field
Field intensity becomes larger.When exciting current is respectively I=1A；2A；3A；When 4A, the magnetic field strength point of magnet exciting coil central area horizontal plane
Not are as follows:.In spinning process, it can be wanted according to different process
It asks, size of current is adjusted, to control the size of magnetic field strength.Appliance stand one end is placed in charging floor, and other end connection is round
Sliding rail, wherein round sliding rail is placed in magnetic case and rotation type wind bottom portion.It, should be according to electrospinning fibre material before spinning technique starts
The characteristics of, eject request and technique require the magnetic case and rotary bellows of selection respective model, and by magnetic case, excitation wire
On circle, the assembling of rotary bellows and appliance stand and round sliding rail；It will collect and cover one layer of tinfoil in plate face, and will be covered with
The collecting board of tinfoil is placed among three appliance stands；Electrospinning container is finally adjusted to device the center point.Complete above-mentioned work
After work, collecting board is connected with the cathode of high voltage power supply with power supply line, the injection syringe needle positive pole of electrospinning fibre is connected, into
And it ensure that form between collecting board and syringe needle and electrospinning fibre promoted to spray generating positive and negative voltage.According to the technological requirements, in control version
Suitable exciting current and space wind field are selected on face, then opens driving motor, rotate rotary bellows, because by
The effect of centripetal force when rotation, the Wind Direction Tablet in bellows groove are driven with bellows at an angle by shaft, the size of the angle
The rotational speed regulation of adjusting driving motor can be passed through.After entering steady state of motion to the Wind Direction Tablet in rotary bellows, it can open
Begin to carry out spinning technique.If other conditions are the same, it introduces after magnetic field, the amplitude of fluctuation of injection stream is because by magnetic field pair
The amplitude of oscillation of the effect of electrified jet Lorentz force, injection stream will be controlled；After introducing space wind field, the swing of injection stream
Amplitude will be controlled further, as shown in Figure 1 for no magnetic field, without wind field under conditions of injection stream amplitude of fluctuation,
Fig. 1 (b) show magnetic field, the amplitude of fluctuation without injection stream under conditions of wind field, and Fig. 1 (c) show magnetic field, has wind field
Under the conditions of injection stream amplitude of fluctuation.Since the movement amplitude of oscillation of injection stream behind introducing magnetic field is reduced, corresponding energy loss
Reduce, promotes the movement velocity of injection stream to further increase, fibre diameter accordingly reduces.
Other than the amplitude of fluctuation of above-mentioned magnetic field opposing jet and fibre diameter are influenced, in spinning process its
In the identical situation of his condition, after introducing magnetic field, the macromolecular chain segment arrangement inside Polymer Solution will also be had an impact.?
During traditional electrostatic spinning, Polymer Solution generates polarization charge, macromolecular chain is along electricity under the action of high voltage electric field
The direction orientations of field, as shown in Figure 2 (a).During magnetic control electrostatic spinning, while high voltage electric field and magnetic field are introduced,
Strand is under Lorentz force action, further orientations, and as shown in Fig. 2 (b), the arrangement of fibrous inside macromolecular chain segment will
Can be even closer, more orderly.
After completing electrostatic spinning process process, Wind Direction Tablet might have the impurity such as residual solution and fiber remnants,
Cut off all power supplys later can remove rotary bellows from device, unlock the block button on bellows, open rotary bellows,
It then takes out Wind Direction Tablet to be cleaned, in case next time uses.
The electrospinning fibre injection environment resultant field wind field control device is transported with controlling injection stream during electrostatic spinning
For the purpose of dynamic unstability, control injection stream motion profile is reached using magnetic field.Under the influence of a magnetic field, injection stream is under
By Lorentz force during falling, certain variation occurs in macroscopic motion, microstructure, to obtain higher-quality spinning
Fiber.
A kind of electrospinning fibre injection environment resultant field wind field control method, includes the following steps:
S1. synchronous motor provides exciting current for magnet exciting coil, adjusts exciting current, change of magnetic field strength, with exciting current
Increase, magnetic field strength becomes larger；
S2. according to the technological requirements, suitable exciting current and space wind field are selected on the control panel, open driving motor,
Rotate rotary bellows, the effect of centripetal force when being rotated, the Wind Direction Tablet in the groove of rotary bellows is driven by shaft
At an angle with bellows, angle enters stabilization to the Wind Direction Tablet in rotary bellows by the rotational speed regulation of adjusting driving motor
After motion state, start to carry out spinning technique；
Magnetic field is introduced, the amplitude of fluctuation of injection stream acts on electrified jet Lorentz force by magnetic field, and the injection stream amplitude of oscillation is controlled
System；Space wind field is introduced, the amplitude of oscillation of injection stream is controlled；The movement amplitude of oscillation of injection stream reduces behind introducing magnetic field, corresponding energy
Amount loss reduces, and promotes the movement velocity of injection stream to increase, fibre diameter accordingly reduces.
Further, step is also executed between step S1 and step S2:
S1.1. before spinning technique starts, selection respective model is required according to electrospinning fibre material, eject request and technique
Magnetic case and rotary bellows, and by magnetic case, magnet exciting coil, rotary bellows be assembled in appliance stand and round sliding rail it
On, one layer of tinfoil is covered in plate face by collecting, and the collecting board for being covered with tinfoil is placed among three appliance stands, by electrospinning
Container is adjusted to device the center point；
S1.2. collecting board is connected with the cathode of high voltage power supply with power supply line, the injection syringe needle positive pole of electrospinning fibre is connected
It connects, is formed between collecting board and injection syringe needle and electrospinning fibre is promoted to spray generating positive and negative voltage.
Further, after completing electrostatic spinning process process, cutting off after all power supplys can be by rotary bellows from dress
It is removed in setting, unlocks the block button on bellows, open rotary bellows, taken out Wind Direction Tablet and cleaned, in case next time uses.
Further, when exciting current is respectively I=1A；2A；3A；When 4A, the magnetic field of magnet exciting coil central area horizontal plane
Intensity is respectively as follows:。
The preferable specific embodiment of the above, only the invention, but the protection scope of the invention is not
It is confined to this, anyone skilled in the art is in the technical scope that the invention discloses, according to the present invention
The technical solution of creation and its inventive concept are subject to equivalent substitution or change, should all cover the invention protection scope it
It is interior.
Claims (10)
1. a kind of electrospinning fibre sprays environment resultant field wind field control device, which is characterized in that mainly by magnetic case, excitation wire
Circle, control panel, synchronous motor, round sliding rail, bearing, device driving motor, rotary bellows, joining device of conveyer belt group
At wherein rotary bellows, magnet exciting coil and magnetic case arranged in co-axial alignment cylindrical, rotary bellows are in innermost layer, magnet exciting coil
In middle layer, magnetic case is in outermost layer；The lower part of rotary bellows connects round sliding rail, the vertical connecting shaft of round sliding rail
It holds, round sliding rail servo axis is forwarded dynamic；Joining device of conveyer belt makes rotary bellows are servo-actuated to turn to bearing transmission rotation
It is dynamic；Synchronous motor is placed in outside magnetic case and provides excitation exciting current for magnet exciting coil, and magnetic upper box part and lower part have round hole,
The line of magnet exciting coil is crossed round hole and is connect with control panel.
2. electrospinning fibre as described in claim 1 sprays environment resultant field wind field control device, which is characterized in that first passes
Band is sent to be centered around in the lower part fluting of rotary bellows, the transmission band connection is simultaneously driven by device driving motor to be formed
Transmission rotation makes the servo-actuated rotation of rotary bellows.
3. electrospinning fibre as claimed in claim 1 or 2 sprays environment resultant field wind field control device, which is characterized in that magnetic
Upper box part has symmetrical rectangular opening, is entrance and the outlet of the second conveyer belt, and second conveyer belt crosses rectangular opening, and by
It is centered around in the fluting of rotation type wind upper box part, the second transmission band connection is simultaneously driven by device driving motor to be formed and be passed
Rotation is sent, the servo-actuated rotation of rotary bellows is made.
4. electrospinning fibre as claimed in claim 3 sprays environment resultant field wind field control device, which is characterized in that further include
Wind Direction Tablet, rotary bellows, magnetic case are made of nonmetallic materials, the annulus column that rotary bellows are made of two semicircle annulated columns
Shape structure, interior surface thereof are the groove of proper alignment for fixing Wind Direction Tablet, and Wind Direction Tablet is fixed on inner bellows surface groove
Interior shaft is used to form stable space wind field.
5. electrospinning fibre as claimed in claim 4 sprays environment resultant field wind field control device, which is characterized in that electrospinning is held
Device, injection syringe needle, collecting board, electrospinning container placement platform, conveyer belt, appliance stand, the appliance stand to device support and
It is connect with bearing, the electrospinning container placement platform is placed near appliance stand, and the electrospinning container is suspended on coaxially
The top of cylinder is arranged, and corresponding with collecting board, electrospinning container has injection syringe needle.
6. electrospinning fibre as claimed in claim 5 sprays environment resultant field wind field control device, which is characterized in that excitation wire
Circle is divided into upper and lower two layers, and lower layer provides the magnetic field bigger than upper layer.
7. electrospinning fibre as claimed in claim 5 sprays environment resultant field wind field control device, which is characterized in that device branch
Frame is made of Titanium-magnesium alloy material.
8. electrospinning fibre as claimed in claim 5 sprays environment resultant field wind field control device, which is characterized in that collecting board
Surface is covered with one layer of tinfoil for collecting electrospinning fibre.
9. electrospinning fibre as claimed in claim 5 sprays environment resultant field wind field control device, which is characterized in that control plane
The operation of exciting current size and control synchronous motor that plate is used to that synchronous motor to be selected to provide.
10. electrospinning fibre as claimed in claim 5 sprays environment resultant field wind field control device, which is characterized in that electrospinning
Electrospinning container position is put and adjusted to container placement platform, and injection syringe needle is in magnet exciting coil the center point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910223741.9A CN109913958B (en) | 2019-03-22 | 2019-03-22 | Composite magnetic field and wind field control device for electrospun fiber spraying environment |
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|---|---|---|---|
| CN201910223741.9A CN109913958B (en) | 2019-03-22 | 2019-03-22 | Composite magnetic field and wind field control device for electrospun fiber spraying environment |
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| CN109913958B CN109913958B (en) | 2021-11-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113564734A (en) * | 2021-07-29 | 2021-10-29 | 黄景雅 | Device and method for realizing electro-spinning fiber hierarchical experimental sample collection by controllable alternating magnetic field |
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| CN2856070Y (en) * | 2005-12-20 | 2007-01-10 | 东华大学 | Electrostatic spinning equipment with magnetic controller |
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| CN113564734A (en) * | 2021-07-29 | 2021-10-29 | 黄景雅 | Device and method for realizing electro-spinning fiber hierarchical experimental sample collection by controllable alternating magnetic field |
| CN113564734B (en) * | 2021-07-29 | 2023-01-20 | 江苏优舒科技有限公司 | Device and method for realizing electro-spinning fiber hierarchical experimental sample collection by controllable alternating magnetic field |
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| CN109913958B (en) | 2021-11-16 |
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