CN111441091A - Electrospinning device for preparing large-aperture fiber material with fluffy structure - Google Patents
Electrospinning device for preparing large-aperture fiber material with fluffy structure Download PDFInfo
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- CN111441091A CN111441091A CN202010297796.7A CN202010297796A CN111441091A CN 111441091 A CN111441091 A CN 111441091A CN 202010297796 A CN202010297796 A CN 202010297796A CN 111441091 A CN111441091 A CN 111441091A
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- roller
- side plate
- roller bracket
- electrospinning
- speed regulating
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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
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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
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
Abstract
The invention relates to an electrospinning device for preparing a large-aperture fiber material with a fluffy structure. The spinning receiving device is provided with a hollow receiving roller, a roller bracket, a coupler, a speed regulating motor and a motor speed regulator, wherein a roller main body is erected on the roller bracket and is grounded, the roller main body is connected with a rotating shaft of the speed regulating motor which is also fixed on the roller bracket through the coupler, the speed regulating motor is connected with the motor speed regulator through a lead, and meanwhile, the speed regulating motor is powered by a 220V alternating current power supply and is connected with a ground wire. According to the invention, water vapor in dry ice condensed air filled in the hollow receiving roller forms ice crystals as a pore-enlarging agent, so that the received electrospinning fiber material has the characteristics of fluffy structure, large pore diameter and the like. The device has the advantages of simple structure, good compatibility, lower cost and simple and convenient operation.
Description
Technical Field
The invention belongs to the technical field of electrostatic spinning equipment manufacturing, relates to an electrostatic spinning superfine fiber material preparation device, and particularly relates to an electrospinning device for preparing a large-aperture fiber material with a fluffy structure.
Background
Electrostatic spinning, as a process technology for continuously producing micron-scale to nanometer-scale fibers, has a basic principle that polymer fibers are prepared by using a high-voltage electrostatic field, and is an important method for preparing superfine fibers by stretching polymer solution or melt through electric field force generated by a high-voltage electrostatic generator. The technological parameters of the electrostatic spinning process are highly controllable, so that the electrospinning materials with different performance structures can be obtained by adjusting and changing the characteristics of the spinning solution or the parameters of the electrospinning conditions, and the method is widely applied to various fields of biological and medical materials, filtration and spinning, energy and batteries, military protection and the like. In the traditional electrostatic spinning technology, the electrospinning fibers are rapidly whipped and continuously deposited on the surface of a receiving plate under the action of an electric field force, the prepared electrospinning material is usually compact in structure, small in pore size (usually less than or equal to 10 microns), and not beneficial to migration and infiltration of surface cells to the interior of the material, only a planar two-dimensional culture rather than a three-dimensional growth mode in vivo is formed, and great challenges are provided for electrospinning materials used for tissue engineering. The good infiltration and migration of cells are important preconditions and characteristics for obtaining good repairing effect of the tissue repairing material, so that the design of the electrospinning device capable of continuously preparing the large-aperture fiber material with the fluffy structure has important significance for the preparation of the tissue engineering material.
Typical electrospinning includes a spinning generation and receiving process, the corresponding spinning generation device includes an injector for supplying a spinning solution, an injection pump and a needle, and a high voltage power supply for supplying a driving force, and the corresponding receiving device is generally a grounded metal device, such as a metal plate, a metal mesh, a metal roller, a device having a specific patterned structure, etc., and can be selected accordingly as required. The existing device and method for preparing the large-pore three-dimensional structure electro-spinning material are basically started from the spinning receiving process, and some innovative improvements are made on the receiving device so as to change the form of electro-spinning fibers on the receiving device and achieve the purposes of enlarging the pore size and obtaining the fluffy large-pore electro-spinning material.
The invention patent with patent publication number CN 106410133A provides a method and a device for preparing three-dimensional oriented fluffy structure electrospun fibers. A square spinning container is arranged below the annular roller receiving device, receiving liquid such as ethanol is contained in the container, and after spinning fibers are generated, the spinning fibers are released after contacting the receiving liquid under the action of gravity, electric field force, torsional force of the annular receiving device, repulsion force between the fibers and the like; then the fibers are uniformly dispersed under the action of the forces and then are frozen after replacement, the dispersed form of the fibers is preserved, and the form of the fibers is maintained through freeze drying, so that the three-dimensional oriented electrospinning fibers are prepared. The method needs to additionally add a spinning container on the basis of a receiving device, introduces other receiving liquid components into the fiber, has a complex operation process, and puts high requirements on equipment and operators.
The utility model with patent publication number CN 208309017U introduces a device for preparing large-aperture nanofiber membrane. Namely, the receiving device is provided with a small hole, and after gas is introduced, the air blown out from the hole can block the prepared fiber jet flow, so that the effect of forming a large hole diameter between fibers is achieved. When the receiving device rotates at a certain rotating speed, the resistance of the gas sprayed from the air holes to the fiber jet flow is uneven, which can cause uneven pores among fibers. And the receiving device is arranged right above the spraying device, and the fiber jet flow falls back to the spraying device due to the influence of gravity, so that the spraying effect is influenced.
The prior art has the problems of high equipment cost, complex operation, uneven prepared material pores and the like. In view of the above practical and technical problems, it is necessary to design and manufacture an electrospinning device that has the advantages of simple operation and low cost, and can be used to prepare a large-aperture electrospinning material with a fluffy structure, so as to overcome the above drawbacks.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides an electrospinning device for preparing a large-aperture fiber material with a fluffy structure, which solves the problems of compact fiber and small aperture in the conventional electrospinning process, and simultaneously, compared with the defects of high equipment and operation requirements, unstable process and the like in the prior art for preparing a three-dimensional electrospinning material, the invention provides an electrospinning device which uses refrigerants such as dry ice and the like at an electrospinning receiving end to cool the surface of a receiving roller, so that water vapor in air is condensed on the surface of the receiving roller to form tiny ice crystal particles as a pore-expanding agent, and the electrospinning fiber can be wound and received on the ice crystal, thereby forming an electrospinning fiber material with a fluffy structure and a large aperture.
Technical scheme
An electrospinning device for preparing a large-aperture fiber material with a fluffy structure is characterized by comprising an electrospinning generating device and a spinning receiving device; the electrospinning generating device comprises a high-voltage power supply 3, an injector 1 and an injection pump 2; the injector 1 is fixed on an injection pump, a spinning needle head on the injector 1 is connected with the anode of a high-voltage power supply 3, and the cathode of the high-voltage power supply 3 is connected with a ground wire; the spinning receiving device comprises a hollow cylindrical barrel 4, a bottom plate 7, a coupler 14, a speed regulating motor 15 and a motor speed regulator 16; the roller rotating mandrel 6 penetrates through roller covers at two ends of the hollow cylindrical barrel 4 and penetrates through side plate bearings 11 on a front side plate 8 and a rear side plate 9 of the roller bracket; the front side plate 8 and the rear side plate 9 of the roller bracket and the speed regulating motor 15 are fixed on the bottom plate 7; the speed regulating motor 15 is connected with the rotary mandrel 6 of the roller through a coupling 14; the speed regulating motor 15 is connected with the output end of the motor speed regulator 16.
And a roller grounding metal wire 12 is arranged on the front side plate 8 of the roller bracket or the rear side plate 9 of the roller bracket.
And one of ice, dry ice and liquid nitrogen is selected as a refrigerant in the hollow cylindrical barrel 4 to cool the surface.
The main body structure of the roller bracket is made of an insulating material, and is selected from one or more of engineering plastics, wood materials, ceramic materials or bakelite.
The roller bracket front side plate 8 and the roller bracket rear side plate 9 are connected by two or more short hinges.
Advantageous effects
The invention provides an electrospinning device for preparing a large-aperture fiber material with a fluffy structure. The electrospinning generating device is provided with a high-voltage power supply, a spinning needle head, an injector and an injection pump, wherein the anode of the high-voltage power supply is connected with the spinning needle head, the cathode of the high-voltage power supply is connected with a ground wire, and the injector is connected with the spinning needle head and is simultaneously fixed on the injection pump; the spinning receiving device is provided with a receiving roller, a roller bracket, a coupler, a speed regulating motor and a motor speed regulator, wherein a roller main body is erected on the roller bracket and is grounded, the speed regulating motor is connected with a rotating shaft of the speed regulating motor which is also fixed on the roller bracket through the coupler, the speed regulating motor is connected with the motor speed regulator through a wire, and meanwhile, the speed regulating motor is powered by a 220V alternating current power supply and is connected with a ground wire.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, dry ice is filled in the receiving roller of the receiving device to serve as a refrigerant to reduce the temperature of the receiving surface, so that water vapor in the air is condensed into micro ice crystals to be deposited on the receiving surface, and the ice crystals provide lapping media for spinning fibers, so that a fluffy macroporous electrospinning fiber material with a three-dimensional structure is formed, and the problem that cells cannot infiltrate and grow into the material due to the fact that the pore diameter of the compact fiber material prepared by the traditional electrospinning technology is too small is solved.
(2) The receiving device can be matched and compatible with most of the existing electrospinning generating devices, has good universality, can be used as the receiving device of the traditional normal-temperature electrospinning when no refrigerant is added in the roller, realizes the free switching of functions of a set of device under different electrospinning experiments, reduces the spinning cost and saves time and space.
(3) The invention has simple structure, convenient operation, low requirements on material selection and processing process and low cost.
(4) The speed regulating motor, the receiving roller and other parts contained in the receiving device are integrated by one receiving bracket, so that the receiving device is reasonable and compact in structure and convenient to move;
all parts of the roller receiving part are connected by threads, so that all parts are convenient to disassemble and assemble and convenient to process while the stable and reliable structure is ensured; the through type mandrel design is adopted, the fixed shaft rotation of the roller on the support is guaranteed, the structural reliability of the roller receiving part is guaranteed, and the stability of fiber receiving in the spinning process is facilitated.
Drawings
FIG. 1 is a schematic overall view of an electrospinning apparatus of the present invention for preparing a bulky macroporous electrospun fibrous material;
FIG. 2 is a schematic diagram of a spinning receiving device according to the present invention, in which the main core components are longitudinally cut;
1. an injector; 2. an injection pump; 3. a high voltage power supply; 4. a hollow cylindrical barrel; 5. a drum cover; 6. the roller rotates the mandrel; 7. a base plate; 8. a front side plate of the roller bracket; 9. a rear side plate of the roller bracket; 10. the rear side plate of the bracket is fixedly hinged with the bottom plate; 11. a side plate bearing; 12. a roller grounding wire; 13. a grounding wire fixing screw; 14. a coupling; 15. a speed-regulating motor; 16. a motor speed regulator; 17. a motor rotating speed display screen; 18. a motor control switch; 19. a motor speed regulation knob; 20. hexagonal flat nuts.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the invention provides the following technical scheme: mainly comprises an electrostatic spinning generating device and a spinning receiving device. The electrospinning generating device is provided with a high-voltage power supply, a spinning needle head, an injector and an injection pump, wherein the anode of the high-voltage power supply is connected with the spinning needle head, the cathode of the high-voltage power supply is connected with a ground wire, and the injector is connected with the spinning needle head and is simultaneously fixed on the injection pump; the spinning receiving device is provided with a receiving roller, a roller bracket, a coupler, a speed regulating motor and a motor speed regulator, wherein a roller main body is erected on the roller bracket and is grounded, the speed regulating motor is connected with a rotating shaft of the speed regulating motor which is also fixed on the roller bracket through the coupler, the speed regulating motor is connected with the motor speed regulator through a wire, and meanwhile, the speed regulating motor is powered by a 220V alternating current power supply and is connected with a ground wire.
The electrospinning generating device is arranged beside the spinning receiving device;
the receiving roller main body structure comprises a metal hollow cylinder roller with a mandrel, and the roller is formed by combining four parts: a hollow cylindrical tube with threads at both ends of the inner side of the tube; two ends of the hollow cylindrical barrel adopt covers which are connected with the barrel body through threads, and a slender cylindrical mandrel which is connected with the covers at the two ends of the barrel through threads is also adopted; the receiving roller main body, the two end covers and the mandrel form a hollow cylindrical structure with a shaft together, a refrigerant is contained in the hollow cylindrical structure, and the two hexagonal flat nuts are respectively connected with the protruding threads formed after the two sides of the mandrel are combined with the covers so as to fasten and stabilize the whole receiving roller structure;
the roller bracket matched with the receiving roller device consists of a bottom long plate and a side short plate, and is connected with two ends of a roller shaft through bearings;
one side short plate of the roller bracket is directly fixed on the bottom long plate, one side short plate is provided with a metal wire which is fixed on the side plate and is lapped on the roller rotating shaft, and the metal wire is connected with a grounding wire; the short plate at the other side is connected with the long plate at the bottom through a hinge, and the short plate rotates at an angle of 90-180 degrees to realize connection and disassembly with a mandrel at one side of the roller;
the mandrel of the receiving roller, which faces one side of the motor, is connected with the rotating shaft of the speed regulating motor through a coupler, and the connection and the disassembly of the mandrel of the receiving roller and the rotating shaft of the motor are realized through adjusting the tightness of the coupler;
the speed regulating motor fixed on the roller bracket is connected with a speed regulator matched with the speed regulating motor through a motor wire, and the rotation speed of the roller is regulated by regulating a knob on the motor speed regulator.
The mandrel of the receiving roller facing to one side of the motor is connected with a rotating shaft of the speed regulating motor through a coupler; and the speed regulating motor fixed on the roller bracket is connected with a speed regulator matched with the speed regulating motor through a motor lead.
The spinning needle of the electrospinning generating device is arranged beside the spinning receiving device and is parallel to the table top, but not limited to the horizontal direction, and the distance between the spinning needle and the table top is 1cm-50 cm.
The length of the hollow cylinder of the receiving roller is 100mm-1000mm, and the outer diameter is 20mm-200 mm; the thickness of the cylinder wall is 3mm-8mm, the inner wall of the cylinder is provided with internal threads, the length of the internal threads is 1/10-1/4 of the length of the cylinder body, and the size of the threads is M14-M194; the material is selected from metal conductors with good conductivity, such as aluminum alloy, zinc alloy and copper alloy.
The thickness of the covers at the two ends of the receiving roller is 3mm-8mm, the diameter of the outer cover end is 22mm-220mm, the diameter of the outer cover end is slightly larger than the diameter of the hollow cylinder body, an internal thread round hole is arranged at the center of the receiving roller and connected with a mandrel of the receiving roller, and the thread size is M6-M25; the inner thread part of the roller cover is connected with the hollow cylinder by external threads, the length of the outer diameter of the inner thread part is consistent with that of the inner wall of the hollow cylinder, and the size of the outer diameter of the inner thread part is consistent with that of the inner wall of the hollow cylinder; the outside of the cover is printed with patterns, and the insulating material is selected or the composite structure of the metal material of the thread part and the insulating material of the outer cover is adopted.
The length of the mandrel of the receiving roller is 140mm-1050mm, the diameter of the main body is 5mm-20mm, the part connected with the cover of the receiving roller is provided with two protruding parts, the protruding parts are provided with external threads, the size is M6-M25, and the protruding parts are connected with the internal threads in the centers of the covers at the two ends of the roller through the external threads.
Referring to fig. 1 and 2, an embodiment of the present invention is explained: an electrospinning device for preparing macroporous electrospun fiber materials with fluffy structures comprises two main parts: comprises electrospinning generating devices shown as 1-3 and spinning receiving devices shown as 4-22.
Referring to fig. 1, the electrospinning generating device is disposed beside the spinning receiving device, and includes a syringe 1 for containing a spinning solution and having a metal spinning nozzle, an injection pump 2 for fixing the syringe 1 and providing a pushing injection pressure thereto, and a high voltage power supply 3 having a positive electrode connected to the metal spinning nozzle of the syringe 1 through a wire and a negative electrode connected to a ground.
Referring to fig. 1 and 2, the spinning receiving apparatus may be divided into a receiving drum, a holder for the receiving drum, and a drum rotation speed control part. The hollow cylindrical barrel comprises a hollow cylindrical barrel 4, wherein the length of a barrel body is 214mm, the thickness of a barrel wall is 3mm, internal threads are arranged at two ends of the inner wall of the barrel, the size of the barrel is M48, and the length of the barrel is 40 mm; the diameter of the end of the outer cover of the roller cover 5 is 70mm, the inner part of the outer cover is connected with the end of the roller body through an external thread, the size of the outer cover is M48, the covers on the two sides of the roller body are connected with the openings at the two ends of the hollow cylindrical barrel 4 through threads, a hole is formed in the center of the cover, an internal thread is formed in the hole, and the size of the thread is M12; a roller rotating mandrel 6, the diameter of the main body of the non-protruding part is 5mm, the protruding parts at the two ends of the non-protruding part are provided with external threads, the size is M12, and the non-protruding part is also combined with the roller covers 5 at the two sides of the roller in a threaded connection mode; two hexagonal flat nuts 20 are connected with the external threads of the protruding parts at the two ends of the rotary mandrel 3 of the drum, and the numbers 4-6 and 20 are the components of the receiving drum. The roller bracket bottom plate 7 and the roller bracket front side plate 8 are firmly connected through self-tapping screws; the rear side plate 9 of the roller bracket is connected with the side surface of the bottom plate 7 of the roller bracket through a hinge 10, and the bottom of the rear side plate is not firmly connected with the bottom plate of the roller bracket, so that the rear side plate can freely rotate (with an included angle of 90-180 degrees) on the bottom plate of the roller bracket 4; a side plate bearing 11 with the outer diameter of 12mm and the inner diameter of 5mm is embedded in round holes on a front side plate of the 8 roller bracket and a rear side plate 9 of the roller bracket; a roller grounding metal wire 12 is contacted with the roller rotating mandrel 6, and two ends of the roller grounding metal wire are fixed on the front side plate 8 of the roller bracket through grounding metal wire fixing screws 13; the above numbers 7-13 are the constituent parts of the drum support. The shaft coupling 14 connects the rotary mandrel 6 of the roller with the rotating shaft of the speed regulating motor 15, the tightness of the shaft coupling is adjustable, and the transmission and the separation of the receiving roller and the shaft coupling are realized; the bottom of the single-phase speed regulating motor 15 is firmly fixed on the bottom plate 7 of the roller bracket; a motor rotating speed display screen 17, a motor control switch 18 and a motor speed regulating knob 19 for regulating the rotating speed of the speed regulating motor 15 are arranged on the front side panel of the motor matching speed regulator 16; the above 14-19 are the components of the drum rotation speed control part.
The spinning needle of the electrospinning generating device is arranged beside the spinning receiving device and is parallel to the table top, but not limited to the horizontal direction, and the distance between the spinning needle and the table top is 1cm-50 cm.
The length of the hollow cylinder barrel of the receiving roller is 100mm-1000mm, the outer diameter is 20mm-200mm, and preferably more than 30mm, so that the filling of dry ice is facilitated; the thickness of the cylinder wall is 3mm-8mm, the inner wall of the cylinder is provided with internal threads, the length of the internal threads is 1/10-1/4 of the length of the cylinder body, and the size of the threads is M14-M194; the material is selected from metal conductors with good conductivity, such as aluminum alloy, zinc alloy and copper alloy.
The thickness of the covers at the two ends of the receiving roller is 3mm-8mm, the diameter of the outer cover end is 22mm-220mm, the diameter is slightly larger than the diameter of the hollow cylinder body, an internal thread round hole is arranged at the center of the receiving roller and connected with a mandrel of the receiving roller, and the thread size is M6-M25; the inner thread part of the roller cover is connected with the hollow cylinder by external threads, the length of the outer diameter is consistent with the length of the internal threads on the inner wall of the hollow cylinder, and the size of the outer diameter is consistent with the diameter of the inner wall of the hollow cylinder; the lid outside is impressed the decorative pattern, conveniently revolves to twist and holds, selects for use insulating material or adopts the combined structure of screw thread part metal material and enclosing cover insulating material, realizes reducing the receipt of marginal electrospinning and the effect of keeping apart the temperature.
The length of the mandrel of the receiving roller is 140mm-1050mm, the diameter of the main body is 5mm-20mm, the part connected with the cover of the receiving roller is provided with two protruding parts, the external threads are arranged on the protruding parts, the size of the protruding parts is M6-M25, and the protruding parts are connected with the internal threads in the centers of the covers at the two ends of the roller through the external threads.
One of ice, dry ice and liquid nitrogen is selected as a refrigerant in the receiving roller to cool the surface;
the main body structure of the roller bracket is made of an insulating material, and is selected from one or more of engineering plastics, wood materials, ceramic materials and bakelite; two curb plates of cylinder support adopt the trapezoidal design of length from top to bottom, reduce the interference to the spinning, and the connection of rotatory side short slab and bottom long slab chooses for use two or more short hinges to connect, and cylinder support bottom long slab thickness moderate degree increases.
The speed regulating motor is a single-phase speed regulating motor with a speed changing gear box, and is matched with a motor speed regulator to realize stepless regulation of the speed regulating motor and the receiving roller within a certain range.
The invention can utilize dry ice in the receiving roller as a refrigerant to reduce the temperature of the receiving surface, water vapor in condensed air forms ice crystals on the receiving surface as a pore-expanding agent, and spinning fibers are lapped on the ice crystals to form a fluffy macroporous fiber material with a three-dimensional structure. Meanwhile, the roller device is disassembled and assembled on the support in a short time, the cover of the roller device is rapidly disassembled and assembled, the roller fixed shaft rotation with adjustable rotating speed is realized, and the rotating speed adjustment in different ranges can be realized by replacing the motor gear box with selectable speed ratio.
The following gives a specific implementation using the invention: firstly, the solid-to-volume ratio of poly-L-lactic acid-caprolactone copolymer with the molecular weight of 10 ten thousand is 3: 1, mixing the trichloromethane-N, N-dimethylformamide solvents, and fully and uniformly mixing all the components at room temperature by using a magnetic stirrer to obtain a poly-L-lactic acid-caprolactone copolymer solution with the mass-volume ratio of 21%; an appropriate amount of the spinning solution was sucked using a syringe 1 and fixed to a syringe pump 2. Standby; a roller cover 5 is combined with one end of a hollow cylinder 4 through a thread part in a rotating way, then a protruding part at one end of a roller rotating mandrel 6 is combined with a central hole of the roller cover 5 connected to the hollow cylinder 4 through a thread part in a rotating way, and the three parts are combined into a roller with one open end; at the moment, a hexagonal flat nut is screwed on the external thread of the rotary mandrel 6 protruding out of the central hole of the cover 5 of the roller in a rotating way; adding 170g of dry ice into the barrel from one side of the opening of the combined receiving roller; then another roller cover 5 is combined on the screw thread at the other end of the hollow cylinder 1 of the combination body in a rotating way by the same method, the central hole of the cover is aligned with the protruding part at the other end of the roller rotating mandrel 6 when the cover is screwed, and the three parts are combined together in a rotating way, and the above parts are combined into a roller with a relatively closed structure; the other hexagonal flat nut is used for rotating and screwing the rotary mandrel 6 of the rotary drum at the other end to protrude out of the external thread at the central hole of the cover 5 of the rotary drum, so that the whole structure of the rotary drum can be fixed and stabilized, and the mandrel is prevented from being separated from the main body when the rotary drum rotates; waiting for 30min to ensure that the receiving roller is fully precooled by the dry ice, unscrewing the roller cover 5 at one end, continuously adding the dry ice until the roller cover is full, screwing the cover tightly, and wiping the water vapor on the surface of the roller for crystallization; adjusting the included angle between the rear side plate of the roller bracket 6 and the bottom plate of the roller bracket 4 of the roller bracket part to 180 degrees; the projecting parts of the roller covers 5 at two ends of the receiving roller are held by wearing heat insulation gloves, the roller rotating mandrel 6 at one side of the receiving roller is inserted into a side plate bearing 11 on a front side plate 8 of a roller bracket and is pushed into a hole of a coupler 14 in a proper way, and the coupler is fastened to fix the roller rotating mandrel 6; while holding the receiving roller by one hand, slowly and carefully adjusting the included angle between the roller bracket rear side plate 9 and the roller bracket bottom plate 7 from 180 degrees to nearly 90 degrees until the other side of the roller rotating mandrel 6 of the roller can be inserted into a side plate bearing 11 on the roller bracket rear side plate 9, and the process needs to be carefully adjusted and operated; a motor control switch 18 on the front side panel of a motor matching speed regulator 16 is opened, so that a single-phase speed regulating motor drives the assembled receiving roller to rotate through a coupler 14, the rotating speed of the roller can be regulated by observing a motor rotating speed display screen 17 and regulating a motor speed regulating knob 19, and required rotating speed parameters are selected; adjusting the distance from a spinning nozzle on the injector 1 to the surface of the hollow cylinder 4 to be 12cm, then starting the injection pump 2, adjusting the solution propelling speed in the injector 1 to be 1.0ml/h, and finally starting a power switch of the high-voltage power supply 3, so that the electrospun superfine fibers can be received under spinning needle heads which are spaced at a proper distance, and the electrostatic spinning process is started; when the dry ice in the roller device is used up, the roller device can be disassembled from the roller bracket according to the disassembling steps opposite to the assembling steps, the hexagonal flat nut 20 and the roller cover 5 at any end of the receiving roller are unscrewed, the dry ice is added into the roller until the roller is full, the roller is assembled on the roller bracket according to the steps after the cover is screwed, the electrospinning fiber can be continuously received, and the long-time sustainable electrospinning process is realized.
The receiving device related to the embodiment can also be used for the traditional electrostatic spinning process at normal temperature, the assembling method of the roller receiving part and the mounting method of the assembled receiving roller and the roller bracket are basically consistent with the steps of the process for preparing the large-aperture electrospinning material with the fluffy structure, and the step of adding and replacing the refrigerant dry ice is only needed to be omitted.
Claims (6)
1. An electrospinning device for preparing a large-aperture fiber material with a fluffy structure is characterized by comprising an electrospinning generating device and a spinning receiving device; the electrospinning generating device comprises a high-voltage power supply (3), an injector (1) and an injection pump (2); the injector (1) is fixed on the injection pump, the spinning needle head on the injector (1) is connected with the anode of the high-voltage power supply (3), and the cathode of the high-voltage power supply (3) is connected with the ground wire; the spinning receiving device comprises a hollow cylindrical barrel (4), a bottom plate (7), a coupler (14), a speed regulating motor (15) and a motor speed regulator (16); the roller rotating mandrel (6) penetrates through roller covers at two ends of the hollow cylindrical barrel (4) and penetrates through a side plate bearing (11) on a front side plate (8) and a rear side plate (9) of the roller bracket; a front side plate (8) of the roller bracket, a rear side plate (9) of the roller bracket and a speed regulating motor (15) are fixed on the bottom plate (7); the speed regulating motor (15) is connected with the rotary mandrel (6) of the roller through a coupling (14); the speed regulating motor (15) is connected with the output end of the motor speed regulator (16).
2. The electrospinning apparatus for preparing a large-aperture fibrous material with a bulky structure according to claim 1, wherein: and a roller grounding metal wire (12) is arranged on the front side plate (8) of the roller bracket or the rear side plate (9) of the roller bracket.
3. The electrospinning apparatus for preparing a large-aperture fibrous material with a bulky structure according to claim 1, wherein: one of ice, dry ice and liquid nitrogen is selected as a refrigerant in the hollow cylindrical barrel (4) to cool the surface.
4. The electrospinning apparatus for preparing a large-aperture fibrous material with a bulky structure according to claim 1, wherein: the main body structure of the roller bracket is made of an insulating material, and is selected from one or more of engineering plastics, wood materials, ceramic materials or bakelite.
5. The electrospinning apparatus for preparing a large-aperture fibrous material with a bulky structure according to claim 1, wherein: the front side plate (8) of the roller bracket and the rear side plate (9) of the roller bracket adopt a trapezoidal design with a short upper part and a long lower part.
6. The electrospinning apparatus for preparing a large-aperture fibrous material with a bulky structure according to claim 1, wherein: the front side plate (8) of the roller bracket is connected with the rear side plate (9) of the roller bracket by two or more short hinges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010297796.7A CN111441091A (en) | 2020-04-16 | 2020-04-16 | Electrospinning device for preparing large-aperture fiber material with fluffy structure |
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| CN202010297796.7A CN111441091A (en) | 2020-04-16 | 2020-04-16 | Electrospinning device for preparing large-aperture fiber material with fluffy structure |
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| CN202010297796.7A Pending CN111441091A (en) | 2020-04-16 | 2020-04-16 | Electrospinning device for preparing large-aperture fiber material with fluffy structure |
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| CN (1) | CN111441091A (en) |
Cited By (1)
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Application publication date: 20200724 |