CN204550809U - A kind of electrostatic spinning apparatus of efficient stable - Google Patents

Abstract

The utility model discloses an efficient and stable electrostatic spinning device, which comprises constant temperature equipment, a voltage amplifier, a signal generator, a controller, a motion platform, a collecting plate, a nozzle device and raw materials for providing the electrostatic spinning solution to the nozzle device The supply device, the raw material supply device, the nozzle device, the collecting plate and the moving platform are set in the constant temperature equipment, the collecting plate is installed on the moving platform, the controller is respectively connected with the raw material supplying device, the signal generator and the moving platform, and the signal generator passes the voltage The amplifier is connected to the sprinkler unit and the collector plate is grounded. This device uses a combination of a signal generator and a voltage amplifier to replace the traditional DC high-voltage generator of electrospinning, which can provide a controllable electrospinning electric field, which is highly controllable and improves the efficiency of electrospinning. The equipment can reduce the impact of environmental factors on electrospinning, improve the stability of electrospinning, and can be widely used in the electrospinning industry.

Description

An Efficient and Stable Electrospinning Device

technical field

The utility model relates to the field of electrostatic spinning, in particular to an efficient and stable electrostatic spinning device.

Background technique

Electrospinning technology was first proposed by Formhzls in 1934. Due to its wide application prospects, it has aroused widespread interest and has been deeply studied. Electrospinning technology is that under the excitation of a high-voltage electric field, the charged polymer solution or melt undergoes directional movement to form a Taylor cone, and finally overcomes the intermolecular force and surface tension to form a jet, which falls to the collecting plate and solidifies into micro-nano fibers.

However, the traditional electrospinning device mostly uses a constant DC voltage to form a DC electric field between the nozzle and the collecting plate. This method has the following defects: During the injection process, because the jet is charged with the same kind, resulting in repulsive Coulombs At the same time, due to the same kind of charge, the charge of the nanofiber deposited on the substrate cannot be conducted away in time, and its residual charge will repel the jet and affect the deposition positioning. Accuracy; moreover, because the jet is directional movement under the action of the electric field, as the deposition thickness increases, the conductivity of the substrate decreases, and the electric field between the nozzle and the substrate weakens, which eventually leads to the stop of the jet, which limits the thickness and production efficiency of fiber collection , thus affecting its application prospects in the field of industrial production and additive manufacturing.

In addition, studies have shown that environmental factors including changes in temperature and relative humidity have a great impact on the diameter and morphological structure of electrospun fibers, and the ambient temperature is an important factor affecting the fiber quality in the electrospinning process. Higher will make the fiber diameter smaller. At present, in order to maintain the stability of electrospinning, the electrospinning equipment is generally placed in a constant temperature environment such as a constant temperature workshop. On the one hand, this method increases the investment in the environment. On the other hand, in order to maintain a constant temperature in the constant temperature workshop, Air currents may be generated that cause large oscillations in the electrospinning jet, which in turn reduces the stability of the electrospinning process.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to provide an efficient and stable electrospinning device.

The technical scheme that the utility model solves its technical problem adopts is:

An efficient and stable electrospinning device, comprising a constant temperature device, a voltage amplifier, a signal generator, a controller, a motion platform, a collecting plate, a nozzle device and a raw material supply device for providing an electrospinning solution to the nozzle device, said The raw material supply device, nozzle device, collecting plate and motion platform are set in the constant temperature equipment, the collecting plate is installed on the motion platform, the controller is respectively connected with the raw material supply device, the signal generator and the motion platform, and the signal generation The device is connected to the spray head device through a voltage amplifier, and the collecting plate is grounded.

Further, the constant temperature equipment includes a casing, a temperature sensor, a temperature adjustment device and a display, the casing forms an openable and closable constant temperature chamber, the temperature sensor is arranged in the constant temperature chamber, and the display is connected to the temperature sensor and the temperature adjustment device respectively. device connection.

Further, the temperature adjustment device and the display are arranged outside the casing.

Further, the outer shell is composed of two layers of glass plates inside and outside, and the two layers of glass plates form a interlayer space, and the interlayer space is connected with the temperature adjustment device.

Further, the nozzle device adopts a syringe, the signal generator is connected to the needle of the syringe through a voltage amplifier, and the working distance between the needle and the collecting plate is 0.1-50 mm.

Further, the raw material supply device adopts a precision syringe pump mechanism.

Further, the flow range of the precision syringe pump mechanism is 0.1-0.5ul/min.

Further, the voltage signal output by the signal generator is an AC voltage or a DC biased AC voltage.

Further, the motion platform is provided with a motion mechanism for moving the motion platform along the three axes of X-Y-Z.

Further, the voltage amplifier provides a voltage of 0-20kV for the shower head device.

The beneficial effects of the utility model are: a high-efficiency and stable electrostatic spinning device of the utility model, including a constant temperature device, a voltage amplifier, a signal generator, a controller, a motion platform, a collecting plate, a nozzle device and a device for spraying the nozzle The raw material supply device that provides the electrospinning solution, the raw material supply device, the nozzle device, the collecting plate and the motion platform are set in the constant temperature equipment, the collecting plate is installed on the motion platform, and the controller is respectively connected with the raw material supply device, the signal generator and the motion platform Connection, the signal generator is connected to the sprinkler device through the voltage amplifier, and the collecting plate is grounded. This device uses a combination of a signal generator and a voltage amplifier to replace the traditional electrospinning DC high-voltage generator, which can provide a controllable electrospinning electric field with strong controllability, and can adjust and control the waveform and amplitude of the electrospinning voltage. The order of the collected nanofibers is increased, the residual charge is greatly reduced, the collection thickness of the fibers can be increased, and the efficiency of electrospinning is improved. Moreover, the device adopts a constant temperature device, which can reduce the influence of environmental factors on the electrospinning and improve the stability of the electrospinning.

Description of drawings

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

Fig. 1 is a structural schematic diagram of an efficient and stable electrospinning device of the present invention.

Detailed ways

Referring to Fig. 1, the utility model provides an efficient and stable electrospinning device, including a constant temperature device 8, a voltage amplifier 2, a signal generator 3, a controller 4, a motion platform 5, a collecting plate 6, a nozzle device 7 and a In order to provide the raw material supply device 1 of the electrospinning solution to the nozzle device 7, the raw material supply device 1, the nozzle device 7, the collecting plate 6 and the moving platform 5 are arranged in the constant temperature equipment 8, and the collecting plate 6 is installed on the moving platform 5, the controller 4 is respectively connected to the raw material supply device 1, the signal generator 3 and the motion platform 5, the signal generator 3 is connected to the nozzle device 7 through the voltage amplifier 2, and the collecting plate 6 is grounded.

Further as a preferred embodiment, the constant temperature device 8 includes a casing, a temperature sensor, a temperature adjustment device and a display, the casing forms an openable and closable constant temperature chamber, the temperature sensor is arranged in the constant temperature chamber, and the display is respectively Connect with temperature sensor and thermostat.

As a further preferred embodiment, the temperature adjustment device and the display are arranged outside the casing.

As a further preferred embodiment, the outer casing is composed of two layers of glass plates inside and outside, and the two layers of glass plates form a interlayer space, and the interlayer space is connected to the temperature adjustment device.

Further as a preferred embodiment, the spray head device 7 is a syringe, the signal generator 3 is connected to the needle of the syringe through the voltage amplifier 2, and the working distance between the needle and the collecting plate 6 is 0.1-50 mm.

As a further preferred embodiment, the raw material supply device 1 adopts a precision syringe pump mechanism.

As a further preferred embodiment, the flow range of the precision syringe pump mechanism is 0.1-0.5 ul/min.

As a further preferred embodiment, the voltage signal output by the signal generator 3 is an AC voltage or a DC biased AC voltage.

As a further preferred embodiment, the motion platform 5 is provided with a motion mechanism for moving the motion platform 5 along three axes of X-Y-Z.

As a further preferred embodiment, the voltage amplifier 2 provides a voltage of 0-20kV for the shower head device.

Below in conjunction with specific embodiment the utility model is further described.

With reference to Fig. 1, a kind of efficient and stable electrospinning device comprises constant temperature equipment 8, voltage amplifier 2, signal generator 3, controller 4, motion platform 5, collecting plate 6, nozzle device 7 and for nozzle device 7 The raw material supply device 1 that provides the electrospinning solution, the raw material supply device 1, the nozzle device 7, the collecting plate 6 and the moving platform 5 are arranged in the constant temperature equipment 8, the collecting plate 6 is installed on the moving platform 5, and the controller 4 is connected with the raw material respectively. The supply device 1, the signal generator 3 and the motion platform 5 are connected, the signal generator 3 is connected with the spray head device 7 through the voltage amplifier 2, and the collecting plate 6 is grounded.

Under the action of the arbitrarily adjustable force provided by the controller 4 , the raw material supply device 1 supplies the electrospinning solution to the nozzle device 7 , so that the electrospinning solution fills the nozzle device 7 . The signal generator 3 is used to generate a voltage signal, and the generated voltage signal is amplified by the voltage amplifier 2 to the high voltage required for electrospinning and then supplied to the nozzle device 7, so that a high voltage can be formed between the grounded collecting plate 6 and the nozzle device 7. The electric field is controlled to ensure the continuous operation of electrospinning. The voltage amplifier 2 provides a voltage of 0-20kV for the shower head device 7 . The voltage signal output by the signal generator 3 is preferably an AC voltage or a DC bias AC voltage, so as to provide an AC electric field for electrospinning.

The specific working principle of this embodiment is: the voltage amplifier 2 and the signal generator 3 provide an AC electric field for electrospinning, so that the charge polarity of the jet sprayed by the nozzle device 7 changes continuously. Pushed by the raw material supply device 1 , the nozzle device 7 flows out the electrospinning solution at a constant flow rate, and finally forms a jet flow and falls on the collecting plate 6 under the action of an electric field. This embodiment can greatly reduce the residual charges on the collecting plate 6, increase the collecting thickness, and finally form fibers with a certain thickness.

In this embodiment, the combination of the signal generator 3 and the voltage amplifier 2 is used to replace the traditional electrospinning DC high-voltage generator, which can provide a controllable electrospinning electric field, adjust and control the waveform and amplitude of the electrospinning voltage, thereby regulating the spinning process. properties of nanofibers. The optimal voltage signal output by the signal generator 3 of this embodiment is a DC biased AC voltage. Experiments show that when an AC electric field with a DC bias is used, the orderliness of the collected nanofibers increases. When an AC electric field is used , the charge polarity of the jet of electrospinning is constantly changing, so that the residual charge on the collecting plate 6 is greatly reduced, and the collection thickness can be increased, even on an insulating substrate (that is, the collecting plate 6 can use a conductive substrate or an insulating substrate. substrate) collection, which improves the efficiency of electrospinning and broadens its application prospects in industrial production and additive manufacturing.

In this embodiment, the constant temperature device 8 includes a housing, a temperature sensor, a temperature adjustment device and a display. The housing forms an openable and closable constant temperature chamber, the temperature sensor is arranged in the constant temperature chamber, and the display is connected to the temperature sensor and the temperature adjustment device respectively. The temperature regulating device and the display are arranged outside the casing. In this embodiment, the raw material supply device 1, the nozzle device 7 and the collecting plate 6 are all accommodated in the constant temperature chamber of the constant temperature device 8, so that when performing electrospinning, the local environment of the electrospinning can be adjusted at a constant temperature to reduce environmental factors The influence on electrospinning improves the stability of electrospinning. Moreover, the constant temperature chamber of the constant temperature device 8 can also isolate the influence of the ambient air flow on the jet flow of the electrospinning, further improving the stability of the electrospinning.

Preferably, in order to further improve the stability of electrospinning, the shell is made of two layers of glass plates inside and outside, and the two layers of glass plates form a interlayer space, and the interlayer space is connected with the temperature adjustment device. The temperature adjustment device includes a refrigeration device and a heating device. Both the refrigeration device and the heating device are connected to the interlayer space. When cooling or heating, the temperature can be adjusted by sending liquid or gas to the interlayer space, so that it will not be in the constant temperature chamber. The airflow formed inside will not affect the jet flow of electrospinning, and can also improve the stability of electrospinning.

In this embodiment, the nozzle device 7 is a syringe, the signal generator 3 is connected to the needle of the syringe through the voltage amplifier 2, and the working distance between the needle and the collecting plate 6 is 0.1-50 mm. Here, the working distance refers to the distance between the ejection end of the electrospinning solution of the nozzle device 7 , that is, the tip of the needle, and the collecting plate 6 .

The motion platform 5 is provided with a motion mechanism to make the motion platform 5 move along the X-Y-Z three-axis, and the motion platform 5 can do the X-Y-Z three-axis motion.

Preferably, the raw material supply device 1 of this embodiment adopts a precision syringe pump mechanism. Preferably, the flow range of the precision syringe pump mechanism is 0.1-0.5ul/min.

It should be noted that the improvement of the utility model lies in the various components of the electrospinning device and the connection relationship between the various components. The electrospinning control involved in the controller or the temperature adjustment involved in the temperature regulating device are all based on the prior art The level of data processing, the utility model does not have any improvement on the data processing method, the utility model only relates to the improvement on the structure, does not relate to the improvement on the method, not to mention any improvement on the software.

The above is a specific description of the preferred implementation of the utility model, but the invention is not limited to the embodiments, and those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the utility model , these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (10)

1. An efficient and stable electrospinning device, characterized in that it comprises constant temperature equipment, a voltage amplifier, a signal generator, a controller, a motion platform, a collecting plate, a nozzle device and a device for providing an electrospinning solution to the nozzle device The raw material supply device, the raw material supply device, the nozzle device, the collecting plate and the moving platform are arranged in the constant temperature equipment, the collecting plate is installed on the moving platform, and the controller is connected with the raw material supplying device, the signal generator and the moving platform respectively connected, the signal generator is connected to the shower head device through a voltage amplifier, and the collecting plate is grounded. 2. A kind of high-efficiency and stable electrospinning device according to claim 1, it is characterized in that, described constant temperature equipment comprises shell, temperature sensor, temperature adjustment device and display, and described shell forms a constant temperature cavity that can be opened and closed , the temperature sensor is arranged in the constant temperature chamber, and the display is respectively connected with the temperature sensor and the temperature adjustment device. 3. A high-efficiency and stable electrospinning device according to claim 2, wherein the temperature adjustment device and the display are arranged outside the casing. 4. A kind of high-efficiency and stable electrospinning device according to claim 2, it is characterized in that, described housing adopts inner and outer two layers of glass plates to form, and these two layers of glass plates form a interlayer space, described interlayer space and Thermostat connection. 5. A kind of high-efficiency and stable electrospinning device according to claim 1, it is characterized in that, described nozzle device adopts syringe, and described signal generator is connected with the needle of syringe through voltage amplifier, and described needle is connected with collecting plate The working distance between them is 0.1~50mm. 6. An efficient and stable electrospinning device according to claim 1, wherein the raw material supply device adopts a precision syringe pump mechanism. 7. An efficient and stable electrospinning device according to claim 6, characterized in that the flow range of the precision syringe pump mechanism is 0.1-0.5ul/min. 8. An efficient and stable electrospinning device according to any one of claims 1 to 7, wherein the voltage signal output by the signal generator is an AC voltage or a DC bias AC voltage. 9. An efficient and stable electrospinning device according to any one of claims 1 to 7, characterized in that, the motion platform is provided with a motion mechanism for moving the motion platform along the three axes of X-Y-Z. 10. An efficient and stable electrospinning device according to any one of claims 1 to 7, wherein the voltage amplifier provides a voltage of 0-20 kV for the nozzle device.