CN209584428U - A portable melt electrospinning device with built-in high-voltage electrodes - Google Patents

Abstract

The utility model belongs to the technical field of melt electrostatic spinning equipment, and relates to a portable melt electrostatic spinning device with a built-in high-voltage electrode, which is composed of a spinning part and a fan part. The main structure of the spinning part includes a spinning nozzle and an electrode holder , electrode, isolation protective cover, heat conduction cylinder, electric heating coil, top wire, high-voltage wire, roller groove, roller, high-voltage electrostatic module, power module, shell, power cord, adjustment switch and No. 1 contact point, the main structure of the fan part Including casing, motor, bracket, fan blade, heating wire, vent hole and No. 2 contact point, using tubular material rod as spinning raw material, using electric heating coil to precisely control the temperature and heat the tubular material rod to make it into a melt , the tubular material rod moves slowly towards the spinning end under the drive of the roller, and the extruded melt is evenly distributed in the ring at the tip of the spinning nozzle to form dozens of jets under the action of an electric field, which form fibers after stretching, solidification and cooling. Real-time batch production of microfibers.

Description

A portable melt electrospinning device with built-in high-voltage electrodes

Technical field:

The utility model belongs to the technical field of melt electrostatic spinning equipment, in particular to a portable melt electrostatic spinning device with a built-in high-voltage electrode, which can realize portable real-time continuous batch preparation of superfine fibers.

Background technique:

Electrospinning is a process that uses high-voltage electrostatics to prepare polymer melts or solutions into ultrafine fibers. It has the characteristics of simple equipment and easy operation, and has attracted extensive attention. It is currently one of the most important methods for preparing continuous polymer nanofibers. one. With the continuous development of nanomaterial technology, electrospinning, as a simple and effective new processing technology for producing nanofibers, plays a huge role in biomedical materials, filtration and protection, catalysis, energy, optoelectronics and food engineering. Electrospinning technology is developing rapidly. Researchers have developed a variety of electrospinning devices around the direction of reducing fiber diameter and increasing fiber output efficiency, but most of them are still in the laboratory stage. It can be used as it is made, which limits the application of electrospinning technology. In recent years, researchers have made several technical improvements around portable electrospinning devices. Chinese patent 201810373378.4 discloses an airflow-assisted hand-held portable electrospinning device including an insulating shell, a large-capacity secondary battery, a charging jack, a high-voltage wire, a high-voltage static electricity generating unit, a high-voltage static electricity generating switch, an airflow conduit connector, an airflow conduit, Syringe fixing bracket, disposable syringe, needle fixing bracket, stainless steel needle, airflow directional cover; the handle part of the insulating shell is provided with a detachable insulating cover; the high-capacity secondary battery is connected to the high-voltage static electricity generating unit and the charging plug through a high-voltage wire Hole connection; the high-voltage static generating unit and the high-voltage static generating switch are connected by high-voltage wires; the high-voltage static generating switch is located inside the handle of the insulating shell; the airflow conduit is located in the middle of the insulating shell, and there is an airflow conduit connection in the middle of the bottom of the insulating shell handle There are two syringe fixing brackets on the upper part of the insulating shell to fix the disposable syringe on the upper part of the insulating shell; the stainless steel needle of the syringe is fixed on the central axis position of the front end of the insulating shell through the needle fixing bracket, and the needle fixing bracket passes through the high-voltage wire and the high-voltage electrostatic The generating unit is connected; the opening of the front section of the insulating shell is provided with a cylindrical airflow directional cover; and a new type of portable electrospinning device disclosed in Chinese patent 201720057770.9 includes a host and a hand-held spray gun. Power supply, gas generating mechanism and high-voltage power supply mechanism. The hand-held spray gun includes a gun body shell, a spinneret and a liquid supply mechanism that provides spinning precursor liquid for the spinneret. The gun body shell is provided with an air inlet and an outlet. The air port, the air inlet is connected to the air guide pipe of the gas generating mechanism, the spinneret extends out of the gun body shell from the air outlet, and the spray port of the spinneret coincides with the central axis of the air outlet; the power supply is electrically connected to the high voltage Power supply mechanism, gas generating mechanism and liquid supply mechanism, the positive electrode of the voltage output end of the high-voltage power supply mechanism is connected to the spinneret through a wire; a portable electrospinning equipment disclosed in Chinese patent 201510214221.3 includes a dry battery power supply, a high-voltage electrostatic generating device, and a feeding device , a gas generating device, a spinning injection device and an insulating shell; the dry battery power supply is electrically connected to a high-voltage static generating device, a feeding device and a gas generating device; the high-voltage static generating device includes a DC-high voltage DC inverter and a voltage regulation circuit , the voltage input end of the DC-high voltage DC inverter is electrically connected to the dry battery power supply, and the voltage output end of the DC-high voltage DC inverter is connected to a voltage regulation circuit that controls the output voltage of the high-voltage electrostatic generating device; the voltage output end of the voltage regulation circuit is It is the voltage output terminal of the high-voltage static electricity generating device, the negative electrode of the voltage output terminal of the high-voltage static electricity generating device is grounded, and the positive pole is connected to the metal capillary nozzle of the spinning jetting device, and the metal capillary nozzle is connected to the feeding device; the spinning jetting device also includes An air flow conduit coaxial with the metal capillary nozzle, the air flow conduit is sleeved on the outside of the metal capillary nozzle, and the air flow conduit is connected to the gas generating device; the dry battery power supply, the high-voltage static electricity generating device, and the gas generating device are placed in an insulating shell, and the insulation Set on the shell There is an opening matching the port diameter of the airflow conduit, and the injection port of the airflow conduit and the metal capillary nozzle is aligned with the opening of the insulating shell or protrudes from the opening; a portable low-voltage near-field electrospinning demonstration device disclosed in Chinese patent 201020156420.6, The main structure includes the experimental instrument shell, voltage supply area, control panel, single door, handle, power plug, spinning dial, grounding wire, high-voltage DC power supply, metal spinning needle, scale support rod, connecting rod, insulation The base surface, aluminum foil, cover glass, Taylor cone and spinning jet are characterized in that a handle is made at the center of the upper side of the experimental instrument shell with a cuboid box structure, and a control panel is formed on the right half of the front side of the experimental instrument shell. The left half is made into a single-opening single-leaf door, and the power cord is connected to the power plug on the rear side of the tester shell; the inner cavity of the tester shell is provided with the internal structure of the main body of the tester, and the bottom of the inner cavity is made with a The bottom surface of the tester shell corresponds to the size of the insulating base surface. A scale support rod is installed vertically in the middle of the left side of the insulating base surface. The upper half of the scale support rod is horizontally formed with a connecting rod, and one end of the connecting rod is formed with a spinning needle disk. There are 1-10 metal spinning needles installed vertically in the spinning needle disk, the top of the metal spinning needle is connected to the positive pole of the high-voltage DC power supply, the bottom of the metal spinning needle is equipped with a Taylor cone, and the tip of the Taylor cone sprays out the spinning Jet flow; aluminum foil is laid on the right side of the center of the insulating base surface, and a cover glass is placed on the aluminum foil; the aluminum foil is connected to the negative pole of the high-voltage DC power supply and connected to the ground wire; a portable small integrated electrospinning machine for laboratories disclosed in Chinese patent 201120097470.6 Including insulating box, transparent plastic door, pressurizing screw, liquid filling bottle cap, exhaust hose, exhaust port valve, incandescent light switch, handle with lock, pressurized gas cylinder, breather valve, connecting sleeve, hose, fixing Ring, DC high-voltage power supply, pressure regulating knob, liquid filling bottle, liquid outlet valve, wire, liquid storage tube, Taylor cone, controllable turning point, incandescent lamp, dirt tray, collector, support rod, fastening screw, The supporting frame, the whole equipment is equipped with a grounding wire, and all parts of the device are integrated in a small insulated box with the liquid storage tube as the center, and are connected by handle screws and clips, which are easy to disassemble; the spinning medium of the above patented product is a solution and cannot be melted Bulk electrospinning cannot achieve batch, portable, continuous and real-time preparation of ultrafine fibers. Therefore, a portable melt electrospinning device was developed and designed, which can realize the miniaturization and portability of the device through built-in high-voltage electrodes, and can realize batch continuous preparation of fibers.

Invention content:

The purpose of the utility model is to overcome the defects of the prior art, and develop a portable melt electrospinning device with a built-in high-voltage electrode, which can realize fiber spraying, deposition and continuous real-time preparation in any direction on any surface.

In order to achieve the above object, the portable melt electrospinning device with a built-in high-voltage electrode of the present invention is composed of a spinning part and a fan part; the main structure of the spinning part includes a spinning nozzle, an electrode holder, an electrode, an isolation protective cover, Heat conduction cylinder, electric heating coil, top wire, high-voltage wire, roller groove, roller, high-voltage electrostatic module, power module, casing, power cord, adjustment switch and No. 1 contact point; internal setting of spinning nozzle with hollow cylindrical structure There is an electrode holder, the top of the spinning nozzle is an outer conical shape, the tail end of the electrode holder is conical, one end of the electrode holder is provided with a spherical electrode, and the periphery of the spinning nozzle is provided with a tubular structure for isolation protection The front end between the spinning nozzle and the isolation protective sleeve is provided with a tubular heat conduction cylinder and an electric heating ring. The electric heating coil is fixedly set inside the front end of the heat conduction cylinder. Adaptive conical shape, three equally spaced top wires tightly connect the spinning nozzle, electrode holder and heat conduction cylinder, one of the top wires is a hollow structure, and the high-voltage wire is drawn out from the electric heating ring and passes through the hollow top After the wire and the electrode holder are connected to the electrode, there are two mirror-symmetrical roller grooves inside the isolation protective cover. Rollers are arranged in the roller grooves, and a high-voltage electrostatic module is installed under the rear end of the isolation protective cover. There is a power module at the bottom of the power module, and the outer casing of the isolation protective cover, the high-voltage electrostatic module and the power module is provided. No. 1 contact point; the main structure of the fan part includes housing, motor, bracket, fan blade, heating wire, vent hole and No. 2 contact point; the inner shell of the hollow structure is equipped with a motor, and the motor passes through two brackets It is fixed inside the casing, the motor is connected to the fan blade, the fan blade is located between two brackets, a heating wire is arranged between the two brackets, the rear end of the casing is provided with a ventilation hole, and the side of the casing is provided with two The No. 1 contact point, the motor and the heating wire are respectively connected to the No. 2 contact point; the gap between the spinning nozzle and the electrode holder is the No. 1 annular cavity, and the gap between the spinning nozzle and the isolation protective sleeve is the No. 2 annular cavity. After the casing is inserted into the No. 2 annular cavity, the spinneret part is connected to the fan part, the No. 1 contact point is connected to the No. 2 contact point, and the power supply module supplies power to the fan part.

Compared with the prior art, the utility model adopts the tubular material rod prepared in advance which is convenient for storage, carrying and installation as the spinning raw material, and uses an electric heating ring to precisely control the temperature and heat a part of the material near the end of the tubular material rod to make it It becomes a melt, and the tubular material rod moves slowly to the spinning end under the drive of the roller. The extruded melt is evenly distributed in the ring at the tip of the conical spinning nozzle. Under the action of the electric field, the ring-shaped melt forms dozens of jets , the high-speed airflow generated by the rotation of the fan blade driven by the motor passes through the heating wire and then drives the jet to blow to the receiving device. The jet is stretched, solidified and cooled to form ultra-fine fibers, thereby realizing real-time batch preparation of ultra-fine fibers. The electrodes are built in In the center of the spinning nozzle, the applied voltage is reduced from the conventional 50-80kV to less than 10kV, which improves the safety factor and reduces the volume of the high-voltage electrostatic module, which is conducive to the realization of the purpose of portable design. The limitation of device connection can realize batch real-time continuous spraying, deposition and preparation of superfine fibers on any surface and any direction, which expands the application direction of electrospinning to prepare micro-nano fibers; its structure is simple, easy to operate, small in size, It is easy to carry and hold, high spinning efficiency, fast heating and spinning speed, precise temperature control, which is conducive to the refinement of fibers, and can be widely used in experimental demonstration, medical and military fields.

Description of drawings:

Fig. 1 is the principle schematic diagram of the main structure of the utility model.

Fig. 2 is a schematic diagram of the principle of the main structure of the tubular material rod involved in the present invention.

Fig. 3 is a schematic diagram of the connection relationship between the tubular material rod and the roller involved in the present invention.

Detailed ways:

Below in conjunction with accompanying drawing and through embodiment the utility model is described in further detail.

Example 1:

The high-voltage electrode built-in portable melt electrospinning device involved in this embodiment is composed of a spinning part 1 and a fan part 3; the main structure of the spinning part 1 includes a spinning nozzle 10, an electrode holder 11, an electrode 12, and an isolation protective cover 13. Heat conduction cylinder 14, electric heating coil 15, top wire 16, high-voltage wire 17, roller groove 18, roller 19, high-voltage electrostatic module 20, power module 21, casing 22, power cord 23, adjustment switch 24 and the first contact point 25. An electrode holder 11 is arranged inside the spinning nozzle 10 of a hollow cylindrical structure, the top of the spinning nozzle 10 is an outer conical shape, the tail end of the electrode holder 11 is conical, and one end of the electrode holder 11 is set There is an electrode 12 with a spherical structure, and a tubular structure isolation protective cover 13 is arranged on the periphery of the spinning nozzle 10, and a tubular structure heat conduction cylinder 14 and an electric heating ring 15 are arranged at the front end between the spinning nozzle 10 and the isolation protective cover 13 , the electric heating ring 15 is fixedly set on the inside of the front end gap of the heat conduction cylinder 14, the top of the heat conduction cylinder 14 is a conical shape suitable for the top of the spinning nozzle 10, and three top wires 16 arranged at equal intervals connect the spinning nozzle 10 1. The electrode holder 11 and the heat conduction cylinder 14 are tightly connected, and one of the top wires 16 is a hollow structure, and the high-voltage wire 17 is drawn out from the electric heating coil 15, and is connected to the electrode 12 after passing through the hollow top wire 16 and the electrode holder 11. The interior of the isolation protective cover 13 is provided with two roller grooves 18 of a mirror-symmetrical structure. The roller grooves 18 are provided with a roller 19. A high-voltage electrostatic module 20 is provided under the rear end of the isolation protective cover 13, and a high-voltage electrostatic module 20 is provided below There is a power module 21, an outer casing 22 is arranged around the isolation protective cover 13, the high-voltage electrostatic module 20 and the power module 21, and the power line 23 extends out of the outer casing 22 after being drawn out from the power module 21, and the outer casing 22 at the high-voltage electrostatic module 20 is provided with Adjust the switch 24, and the outer side of the housing 22 is provided with a No. 1 contact point 25; the main structure of the fan part 3 includes a housing 30, a motor 31, a bracket 32, a fan blade 33, a heating wire 34, a vent hole 35 and a No. 2 contact point 36; The inside of the housing 30 of the hollow structure is provided with a motor 31, the motor 31 is fixed inside the housing 30 by two brackets 32, the motor 31 is connected to the fan blade 33, and the fan blade 33 is located between the two brackets 32, the two brackets 32 A heating wire 34 is arranged between the root brackets 32, an air vent 35 is provided at the rear end of the housing 30, and a second contact point 36 is arranged on the side of the housing 30, and the motor 31 and the heating wire 34 are connected to the second contact point 36 respectively. Connection; the gap between the spinning nozzle 10 and the electrode holder 11 is the No. 1 annular cavity 41, the gap between the spinning nozzle 10 and the isolation protective sleeve 13 is the No. 2 annular cavity 42, and the housing 30 is inserted into the No. 2 annular cavity After 42, the spinneret part 1 is connected to the fan part 3, the first contact point 25 is connected to the second contact point 36, and the power supply module 21 supplies power to the fan part 3.

The electrode holder 11 and the isolation protective cover 13 involved in this embodiment are all heat-insulating insulating materials, including ceramics, polytetrafluoroethylene and polyether ether ketone; the isolation protective cover 13 has heat insulation and insulation functions, and can protect personnel and equipment Safety; the roller 19 is a concave wheel; the power module 21 performs AC-DC conversion and step-down processing on the mains; the high-voltage electrostatic module 20 of the shell 22 and the outer part of the power module 21 are hand-held parts; the power cord 23 can be connected to the mains or lithium battery Connection; the adjustment switch 24 can adjust the flow rate and temperature of the airflow, the electrostatic voltage, the rotating speed of the roller 19, the temperature of the electric heating ring 15 and the temperature of the heating wire 34; the housing 30 has a positioning effect on the spinning nozzle 10; the motor 31 is a high-speed The motor; the heating wire 34 is a thermal resistance heating wire; the vent hole 35 is a channel for air to enter the housing 30 .

When the high-voltage electrode built-in portable melt electrospinning device involved in this embodiment is used, the fan part 3 is removed, and the tubular material rod extruded or injection-molded by the polymer raw material that is convenient for storage and carrying is sent to the concave surface of the roller 19. Between, the inner diameter and the outer diameter of the tubular material rod are the same as the inner diameter and the outer diameter of the No. 2 annular chamber 42, and then the fan part 3 is inserted in the No. 2 annular chamber 42; the power line 23 is connected with the mains, and the motor 31 drives the fan blade 33 rotates at a high speed to generate a rightward airflow. The airflow becomes a hot airflow after being heated by the heating wire 34. According to the set spinning parameters, the temperature and speed of the hot airflow are adjusted and controlled by the adjustment switch 24. The hot airflow passes through the spinning nozzle The cavity of 10 enters the No. 1 annular cavity 41, and is ejected from the outside of the electrode 12 after being distributed in a ring; at the same time, the tubular material rod is clamped by the concave surface of the roller 19 and transported to the right in the No. 2 annular cavity 42, and the roller is adjusted by adjusting the switch 24. 19 to adjust the conveying speed of the tubular material rod in the second annular cavity 42, the right end of the tubular material rod reaches the heat conduction cylinder 14. The tubular material rod at 14 is heated and melted into a melt, and the melt is extruded to the tapered tip of the spinning nozzle 10 by the tubular material rod continuously conveyed to the right, and is evenly distributed in a ring shape; the electrode 12 is placed in the high-voltage electrostatic module 20 Under the action of high-voltage static electricity, adjust the electrostatic voltage to 10kV by adjusting the switch 24, the electrode 12 is charged, the tip of the cone surface of the spinning nozzle 10 is charged by induction, and the melt at the tip of the cone surface of the spinning nozzle 10 self-organizes to form dozens of uniform The distributed jet, driven by the hot air flow, is sprayed forward to the receiving device, and the jet is stretched, solidified and cooled to form ultra-fine fibers.

Claims (1)

1. A portable melt electrospinning device with a built-in high-voltage electrode, characterized in that the main structure is composed of a spinning part and a fan part; the main structure of the spinning part includes a spinning nozzle, an electrode holder, an electrode, an isolation protective cover, Heat conduction cylinder, electric heating coil, top wire, high-voltage wire, roller groove, roller, high-voltage electrostatic module, power module, casing, power cord, adjustment switch and No. 1 contact point; internal setting of spinning nozzle with hollow cylindrical structure There is an electrode holder, the top of the spinning nozzle is an outer conical shape, the tail end of the electrode holder is conical, one end of the electrode holder is provided with a spherical electrode, and the periphery of the spinning nozzle is provided with a tubular structure for isolation protection The front end between the spinning nozzle and the isolation protective sleeve is provided with a tubular heat conduction cylinder and an electric heating ring. The electric heating coil is fixedly set inside the front end of the heat conduction cylinder. Adaptive conical shape, three equally spaced top wires tightly connect the spinning nozzle, electrode holder and heat conduction cylinder, one of the top wires is a hollow structure, and the high-voltage wire is drawn out from the electric heating ring and passes through the hollow top After the wire and the electrode holder are connected to the electrode, there are two mirror-symmetrical roller grooves inside the isolation protective cover. Rollers are arranged in the roller grooves, and a high-voltage electrostatic module is installed under the rear end of the isolation protective cover. There is a power module at the bottom of the power module, and the outer casing of the isolation protective cover, the high-voltage electrostatic module and the power module is provided. No. 1 contact point; the main structure of the fan part includes housing, motor, bracket, fan blade, heating wire, vent hole and No. 2 contact point; the inner shell of the hollow structure is equipped with a motor, and the motor passes through two brackets It is fixed inside the casing, the motor is connected to the fan blade, the fan blade is located between two brackets, a heating wire is arranged between the two brackets, the rear end of the casing is provided with a ventilation hole, and the side of the casing is provided with two The No. 1 contact point, the motor and the heating wire are respectively connected to the No. 2 contact point; the gap between the spinning nozzle and the electrode holder is the No. 1 annular cavity, and the gap between the spinning nozzle and the isolation protective sleeve is the No. 2 annular cavity. After the casing is inserted into the No. 2 annular cavity, the spinneret part is connected to the fan part, the No. 1 contact point is connected to the No. 2 contact point, and the power supply module supplies power to the fan part.