CN219930349U

CN219930349U - Nanofiber receiver

Info

Publication number: CN219930349U
Application number: CN202321552903.1U
Authority: CN
Inventors: 贺坤云; 李金虎; 郑永正
Original assignee: Beijing Yongkang Industry Technology Development Co ltd
Current assignee: Beijing Yongkang Industry Technology Development Co ltd
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-10-31
Anticipated expiration: 2033-06-16

Abstract

The utility model discloses a nanofiber receiver, which comprises a receiving device and a heating device, wherein the receiving device comprises a support, a connecting shaft, a receiving roller and a driving assembly, the connecting shaft is fixedly connected with the support, the receiving roller is rotatably connected with the connecting shaft, a cavity is formed in the receiving roller, and the driving assembly is used for driving the receiving roller to rotate; the heating device comprises at least one electric heating tube arranged in the cavity for heating the receiving roller. The nanofiber receiver provided by the utility model solves the problems of low heating efficiency and large occupied area and occupied space of equipment on the basis of completing nanofiber forming and heat treatment in one step.

Description

Nanofiber receiver

Technical Field

The utility model relates to the technical field of electrostatic spinning equipment, in particular to a nanofiber receiver.

Background

The electrostatic spinning technology has the advantages of simple preparation device, various spinnable substances, controllable process and the like, and is one of the main methods for preparing the nanofiber. In the process of electrostatic spinning of the solution, the properties, technological parameters, environmental parameters and the like of the spinning solution can influence the morphology and the structure of the fiber. The temperature not only affects the viscosity of the spinning solution, but also affects the volatilization of the solvent in the electrostatic spinning process, thereby affecting the morphology of the fiber on the collector.

The temperature is increased to facilitate complete volatilization of the high boiling point solvent, which is beneficial to stabilization of nanofiber morphology and prevents nanofiber membrane adhesion. At present, the curing mode of the electrostatic spinning accelerating fiber mainly comprises external heating, namely, a nanofiber receiver comprises a receiving device and a heating device, the heating device is composed of a plurality of groups of heating coils and is independently arranged on the outer side of the nanofiber receiver to heat the nanofiber receiver, a sealing cover is covered on the outer sides of the nanofiber generator and the nanofiber receiver to design a spinning area into a closed space, and finally the whole space reaches the temperature required by curing. Because the heating device is independently arranged outside the receiving device, the heating efficiency is low, and the occupied area and the occupied space of the nanofiber receiver are increased.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a nanofiber receiver which solves the problems of low heating efficiency and large occupied area and occupied space of equipment on the basis of completing nanofiber forming and heat treatment in one step.

The utility model is realized by the following technical scheme:

a nanofiber receiver comprising:

the receiving device comprises a support, a connecting shaft, a receiving roller and a driving assembly, wherein the connecting shaft is fixedly connected with the support, the receiving roller is rotatably connected with the connecting shaft, a cavity is formed in the receiving roller, and the driving assembly is used for driving the receiving roller to rotate;

heating device, it includes at least one electric heating pipe, electric heating pipe sets up in the cavity is used for heating receiving the cylinder.

Further, the heating device further comprises a fixing support, the fixing support is arranged in the cavity, the fixing support is fixedly connected with the connecting shaft, and the electric heating pipe is fixedly connected with the fixing support.

Further, the fixed support comprises a first fixed frame and a second fixed frame, the first fixed frame and the second fixed frame are fixedly sleeved on the connecting shaft, at least one electric heating pipe comprises a pair of electric heating pipes, the pair of electric heating pipes are symmetrically arranged relative to the connecting shaft, and one end of each electric heating pipe is fixedly connected with the first fixed frame, the other end of each electric heating pipe is fixedly connected with the second fixed frame.

Further, the connecting shaft is provided with a groove, the outer wall of the groove is provided with an opening, the opening is used for communicating the groove with the cavity, the heating device further comprises a cable, and the cable sequentially passes through the groove and the opening to be connected with the electric heating pipe.

Further, the heating device further comprises a temperature sensor and a controller, wherein the temperature sensor and the electric heating pipe are electrically connected with the controller, and the temperature sensor is located right above the receiving roller and vertically irradiates the surface of the receiving roller so as to monitor the surface temperature of the receiving roller in real time.

Further, the driving assembly comprises a motor, a driving wheel, a driven wheel and a transmission belt for connecting the driving wheel and the driven wheel, wherein the driving wheel is fixedly connected with an output shaft of the motor, and the driven wheel is fixedly connected with the receiving roller.

Further, the support is "", the support includes bottom plate, first curb plate and second curb plate, bottom plate one end with first curb plate fixed connection, the other end with second curb plate fixed connection, action wheel, follow driving wheel and drive belt are located first curb plate with receive between the cylinder, the motor is located first curb plate is kept away from one side of action wheel, just the motor with first curb plate fixed connection.

Further, an opening is formed in the first side plate, and an output shaft of the motor penetrates through the opening.

Further, the receiving device further comprises a casing, wherein the casing covers the driving assembly and the outer side of the first side plate, and the casing is fixedly connected with the first side plate.

Further, the receiving device further comprises a conductive rod, the conductive rod is fixedly arranged on the second side plate, one end of the conductive rod is exposed out of the second side plate and used for being connected with negative high voltage, and the other end of the conductive rod is abutted to the connecting shaft.

Compared with the prior art, the utility model has the advantages that:

1. through setting up electric heating pipe in receiving the cavity of cylinder for can be when nanofiber collection, heat treatment go on simultaneously, solve heating inefficiency, equipment area and occupation space great problem.

2. Through seting up the recess on the connecting axle, the trompil is seted up to the outer wall that forms the recess, and the cable of heating pipe plug connection is connected with electric heating pipe through recess and trompil in proper order, avoids the cable to expose in the outside, makes the receiver tolerating high voltage electric field when heating, and safety has ensured, has improved the security of the work of receiver.

3. The pair of electric heating pipes are symmetrically arranged about the connecting shaft, so that the electric heating pipes uniformly heat the surface of the receiving roller, and the morphology structure of the nanofiber is improved.

Drawings

FIG. 1 is a schematic illustration of a nanofiber receiver according to an embodiment of the present utility model;

FIG. 2 is a right side view of the nanofiber receiver;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a partial structure of a nanofiber receiver;

fig. 5 is a circuit control block diagram of the heating device.

1. A receiving device; 3. a support; 30. a bottom plate; 31. a first side plate; 310. an opening; 32. a second side plate; 4. a connecting shaft; 40. a groove; 41. an outer wall; 42. opening holes; 5. a receiving roller; 50. a cavity; 6. a drive assembly; 60. a motor; 600. an output shaft; 61. a driving wheel; 62. driven wheel; 63. a drive belt; 7. a housing; 8. a conductive rod; 9. a first bearing; 10. a second bearing; 11. a motor plug; 2. a heating device; 20. an electric heating tube; 21. a fixed bracket; 210. a first fixing frame; 211. the second fixing frame; 22. a cable; 23. a temperature sensor; 24. heating pipe plug; 25. and a controller.

Detailed Description

The technical scheme of the utility model is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present utility model, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1, a nanofiber receiver according to an embodiment of the present utility model includes a receiving device 1 and a heating device 2, wherein the heating device 2 is disposed inside the receiving device 1 for heating the receiving device 1.

The receiving device 1 comprises a support 3, a connecting shaft 4, a receiving roller 5 and a driving component 6, wherein the connecting shaft 4 is fixedly connected with the support 3, the receiving roller 5 is rotatably connected with the connecting shaft 4, a cavity 50 is formed in the receiving roller 5, and the driving component 6 is used for driving the receiving roller 5 to rotate. The heating device 2 comprises at least one electric heating tube 20 and a fixing support 21, wherein the electric heating tube 20 and the fixing support 21 are arranged in the cavity 50, the fixing support 21 is fixedly connected with the connecting shaft 4, and the electric heating tube 20 and the fixing support 21 are fixedly connected. The electric heating pipe 20 can conduct heat to the receiving roller 5, so that the receiving roller 5 is heated, and further, the nanofiber is heated.

In this embodiment, the receiving roller 5 is integrally formed and has a cylindrical shape, the diameter of which is 150mm, the length of which is 300mm, and the rotation speed of which is 0-140rpm, and the diameter and the length of the receiving roller 5 depend on the area of the required nanofiber membrane sample, and the size of the receiving roller is not particularly limited.

The heating device 2 further comprises a temperature sensor 23 and a controller 25, wherein the temperature sensor 23 is positioned right above the receiving roller 5 and vertically irradiates on the surface of the receiving roller 5 to monitor the surface temperature of the receiving roller 5 in real time, and the temperature sensor 23 and the electric heating tube 20 are electrically connected with the controller 25, wherein the controller 25 is a PLC. In this embodiment, the receiving roller 5 is made of medical stainless steel, the surface temperature of the receiving roller 5 can be set according to requirements, and the surface temperature can be heated to 100 ℃ at the highest, so that the volatilization of residual solvent and the reduction of residual are facilitated, the thermal crosslinking can be realized in one step, and the mechanical property of the material is improved. When the temperature sensor 23 detects the surface temperature of the receiving roller 5 and converts the surface temperature into an output signal to be transmitted to the controller 25, the controller 25 sets a proper temperature range of the receiving roller 5 in advance, when the temperature detected by the temperature sensor 23 is lower than a preset temperature, the controller 25 automatically turns on the power supply of the electric heating pipe 20, the electric heating pipe 20 which is turned on the power supply releases heat, and the surface temperature of the receiving roller 5 is increased; when the temperature detected by the temperature sensor 23 is higher than the preset temperature, the controller 25 automatically cuts off the power supply of the electric heating tube 20, thereby realizing automatic control of the temperature range of the receiving roller 5.

The heating device 2 further comprises a heating tube plug 24, the heating tube plug 24 being connected to the electric heating tube 20 by means of a cable 22.

The fixing bracket 21 comprises a first fixing bracket 210 and a second fixing bracket 211, the first fixing bracket 210 and the second fixing bracket 211 are fixedly sleeved on the connecting shaft 4, at least one electric heating pipe 20 comprises a pair of electric heating pipes 20, the pair of electric heating pipes 20 are symmetrically arranged about the connecting shaft 4, one end of each electric heating pipe 20 is fixedly connected with the first fixing bracket 210, and the other end of each electric heating pipe 20 is fixedly connected with the second fixing bracket 211. By symmetrically arranging the pair of electric heating pipes 20 about the connecting shaft 4, the electric heating pipes 20 can uniformly heat the surface of the receiving roller 5, thereby improving the appearance of the porous structure nanofiber.

The connecting shaft 4 is provided with a groove 40, the outer wall 41 forming the groove 40 is provided with an opening 42, the opening 42 is used for communicating the groove 40 and the cavity 50, the heating device 2 further comprises a cable 22, and the cable 22 is connected with the electric heating tube 20 through the groove 40 and the opening 42 in sequence.

The driving assembly 6 comprises a motor 60, a driving wheel 61, a driven wheel 62 and a transmission belt 63 for connecting the driving wheel 61 and the driven wheel 62, wherein the driving wheel 61 is fixedly connected with an output shaft 600 of the motor 60, and the driven wheel 62 is fixedly connected with the receiving roller 5. Specifically, the driving wheel 61 is fixedly connected with the output shaft 600 of the motor 60 through a screw (not shown), and the driven wheel 62 is fixedly connected with the receiving roller 5 through a screw. The motor 60 drives the driving wheel 61 to rotate through the output shaft 600, the driving wheel 61 and the driven wheel 62 are driven through the transmission belt 63, and the driven wheel 62 drives the receiving roller 5 to rotate around the connecting shaft 4.

The support 3 is "", and support 3 includes bottom plate 30, first curb plate 31 and second curb plate 32, bottom plate 30 one end and first curb plate 31 fixed connection, the other end and second curb plate 32 fixed connection, and action wheel 61, follow driving wheel 62 and driving belt 63 are located between first curb plate 31 and the receiving drum 5, and motor 60 is located one side that the action wheel 61 was kept away from to first curb plate 31, and motor 60 and first curb plate 31 fixed connection. And the first side plate 31 is provided with an opening 310, and an output shaft 600 of the motor 60 passes through the opening 310.

The receiving device 1 further comprises a housing 7, a conductive rod 8, a first bearing 9, a second bearing 10 and a motor plug 11, wherein the housing 7 is covered on the outer side of the driving assembly 6 and the first side plate 31, and the housing 7 is fixedly connected with the first side plate 31. The conductive rod 8 is fixedly arranged on the second side plate 32, and one end of the conductive rod 8 is exposed out of the second side plate 32 and is used for connecting negative high voltage, and the other end of the conductive rod is abutted with the connecting shaft 4. The first bearing 9 is disposed between the driving wheel 61 and the connecting shaft 4, the second bearing 10 is disposed between the receiving roller 5 and the connecting shaft 4, and the motor plug 11 is connected to the motor 60.

Specifically, by applying an electrostatic negative high voltage opposite to the ejection voltage for causing the polymer droplets, the electrostatic negative high voltage is conducted to the surface of the receiving roller 5 through the conductive rod 8, the connecting shaft 4 and the second bearing 10 in order to increase the potential difference between the receiving roller 5 and the ejection voltage, facilitating the deposition of the filaments on the receiving roller 5.

In this embodiment, the material of the support 3, the casing 7, the driving wheel 61, the driven wheel 62 and the driving belt 63 is an insulating material, and may be any one of polyoxymethylene, nylon, polytetrafluoroethylene, polyurethane, epoxy resin, polystyrene, polyethylene, polystyrene, polyvinyl chloride and perfluoropropylene.

In preparing PLLA fiber membranes, one embodiment of the utility model comprises the following steps:

(1) Preparing a certain amount of PLLA hexafluoroisopropanol spinning solution, wherein the solution comprises 8wt% of PLLA and 92wt% of hexafluoroisopropanol;

(2) A syringe (not shown) is used to suck a certain amount of spinning solution and fix it on a syringe pump (not shown);

(3) Connecting a spinning nozzle (not shown in the figure) at the front section of the injector, horizontally aligning the spinning nozzle with a receiving area of the receiving roller 5, and setting the linear spinning distance between the spinning nozzle and the receiving roller 5 to be 15cm;

(4) Clamping a positive high-voltage wire contact clamp (not shown in the figure) onto the spinning nozzle, and connecting a negative high-voltage wire contact clamp onto the conductive rod 8;

(5) Setting the temperature of the receiving roller 5 to be 21 ℃, 30 ℃, 40 ℃ at room temperature and starting the electric heating tube 20;

(6) Setting the rotation speed of the receiving roller 5 to 100rpm, and starting;

(7) Setting the ambient temperature to 30 ℃, and setting the air relative humidity to 35%, wherein the flow rate of the spinning solution is 1.5ml/h;

(8) After the surface temperature of the receiving roller 5 is stable, simultaneously starting a syringe pump to supply liquid, starting to open positive high voltage and negative high voltage, and adjusting the positive high voltage and the negative high voltage to be 16.5kV and 3.0kV respectively;

(9) The receiving roller 5 connected with negative high pressure carries out traction stretching and directional adsorption on jet flow sprayed by a spinning nozzle, and simultaneously carries out heating treatment on fibers falling on the surface of the receiving roller 5 through the electric heating pipe 20, and PLLA fiber films can be collected in a receiving area after a period of time.

The utility model controls the electrostatic spinning electric field by connecting the receiving roller 5 with the negative high-voltage, so that the ejected fiber is pulled by the electric field force, the uniform and stable receiving of the nanofiber is improved, and the heat treatment is synchronously carried out on the nanofiber sample. By arranging the electric heating tube 20 in the cavity 50 of the receiving drum 5, the footprint and the occupied space of the receiver is reduced on the basis of the possibility of preparing nanofibres. By forming the groove 40 on the connecting shaft 4, the outer wall 41 forming the groove 40 is provided with the opening 42, and the cable 22 connected with the heating pipe plug 24 is connected with the electric heating pipe 20 sequentially through the groove 40 and the opening 42, so that the cable 22 is prevented from being exposed outside, and the working safety of the receiver is improved.

The utility model has the following beneficial effects:

1. by arranging the electric heating tube 20 in the cavity 50 of the receiving drum 5, the problems of low heating efficiency, large occupied area of equipment and large occupied space can be solved while the nanofiber collection and the heat treatment are synchronously carried out.

2. Through seting up recess 40 on connecting axle 4, the outer wall 41 that forms recess 40 seting up trompil 42, and the cable 22 that is connected with heating pipe plug 24 is connected with electric heating pipe 20 through recess 40 and trompil 42 in proper order, avoids cable 22 to expose in the outside, makes the receiver withstand high voltage electric field when heating, and the security has ensured, has improved the security of the work of receiver.

3. By arranging the pair of electric heating pipes 20 symmetrically about the connecting shaft 4, the electric heating pipes 20 heat the surface of the receiving roller 5 uniformly, thereby improving the morphology of the nanofibers.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A nanofiber receiver, comprising:

the receiving device (1) comprises a support (3), a connecting shaft (4), a receiving roller (5) and a driving assembly (6), wherein the connecting shaft (4) is fixedly connected with the support (3), the receiving roller (5) is rotatably connected with the connecting shaft (4), a cavity (50) is formed in the receiving roller (5), and the driving assembly (6) is used for driving the receiving roller (5) to rotate;

-a heating device (2) comprising at least one electric heating tube (20), said electric heating tube (20) being arranged in said cavity (50) for heating said receiving drum (5).

2. The nanofiber receiver according to claim 1, characterized in that the heating device (2) further comprises a fixing bracket (21), the fixing bracket (21) is arranged in the cavity (50), the fixing bracket (21) is fixedly connected with the connecting shaft (4), and the electric heating tube (20) is fixedly connected with the fixing bracket (21).

3. The nanofiber receiver according to claim 2, characterized in that the fixing bracket (21) comprises a first fixing bracket (210) and a second fixing bracket (211), the first fixing bracket (210) and the second fixing bracket (211) are fixedly sleeved on the connecting shaft (4), at least one electric heating pipe (20) comprises a pair of electric heating pipes (20), the pair of electric heating pipes (20) are symmetrically arranged about the connecting shaft (4), and one end of each electric heating pipe (20) is fixedly connected with the first fixing bracket (210), and the other end is fixedly connected with the second fixing bracket (211).

4. Nanofiber receiver according to claim 1, characterized in that the connecting shaft (4) is provided with a groove (40), the outer wall (41) forming the groove (40) is provided with an opening (42), the opening (42) is used for communicating the groove (40) and the cavity (50), the heating device (2) further comprises a cable (22), and the cable (22) is connected with the electric heating tube (20) sequentially through the groove (40) and the opening (42).

5. The nanofiber receiver according to claim 1, characterized in that the heating device (2) further comprises a temperature sensor (23) and a controller (25), the temperature sensor (23) and the electric heating tube (20) are electrically connected with the controller (25), and the temperature sensor (23) is located right above the receiving roller (5) and irradiates perpendicularly to the surface of the receiving roller (5) to monitor the surface temperature of the receiving roller (5) in real time.

6. The nanofiber receiver according to claim 1, characterized in that the driving assembly (6) comprises a motor (60), a driving wheel (61), a driven wheel (62) and a transmission belt (63) for connecting the driving wheel (61) and the driven wheel (62), the driving wheel (61) and an output shaft (600) of the motor (60) are fixedly connected, and the driven wheel (62) and the receiving roller (5) are fixedly connected.

7. The nanofiber receiver according to claim 6, characterized in that the support (3) is "", the support (3) comprises a bottom plate (30), a first side plate (31) and a second side plate (32), one end of the bottom plate (30) is fixedly connected with the first side plate (31), the other end of the bottom plate is fixedly connected with the second side plate (32), the driving wheel (61), the driven wheel (62) and the transmission belt (63) are located between the first side plate (31) and the receiving roller (5), the motor (60) is located on one side of the first side plate (31) away from the driving wheel (61), and the motor (60) is fixedly connected with the first side plate (31).

8. The nanofiber receiver according to claim 7, characterized in that the first side plate (31) is provided with an opening (310), through which opening (310) the output shaft (600) of the motor (60) passes.

9. The nanofiber receiver according to claim 7, characterized in that the receiving means (1) further comprise a housing (7), the housing (7) being housed outside the drive assembly (6) and the first side plate (31) and the housing (7) and the first side plate (31) being fixedly connected.

10. The nanofiber receiver according to claim 7, characterized in that the receiving device (1) further comprises a conductive rod (8), wherein the conductive rod (8) is fixedly arranged on the second side plate (32), and one end of the conductive rod (8) is exposed out of the second side plate (32) for connecting negative high voltage, and the other end is abutted with the connecting shaft (4).