CN111867225A - Electric field separation device based on plasma - Google Patents
Electric field separation device based on plasma Download PDFInfo
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- CN111867225A CN111867225A CN201910363319.3A CN201910363319A CN111867225A CN 111867225 A CN111867225 A CN 111867225A CN 201910363319 A CN201910363319 A CN 201910363319A CN 111867225 A CN111867225 A CN 111867225A
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
Abstract
The invention discloses two electric field separation devices based on plasma, wherein the first electric field separation device comprises an insulating bottom plate and a conductive electrode; one end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed; in the working state, the number of the conductive electrodes is equal to that of the plasma jet flow and corresponds to that of the plasma jet flow one by one; the second type also comprises a first conductive polar plate, the upper surface of the first conductive polar plate is contacted with the plasma, one end of the conductive electrode is connected with the lower bottom surface of the first conductive polar plate, and the other end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed; the first conducting electrode plate is in contact with the plasma and is used for providing an electrical interface for the conducting electrode; the conductive electrode is used for separating an electric field generated by the plasma from the plasma; the insulating bottom plate is used for isolating active ingredients in the plasma; the electric field separation device is convenient to operate, and the application range of the plasma is greatly widened.
Description
Technical Field
The invention belongs to the field of plasma application, and particularly relates to an electric field separation device based on plasma.
Background
The plasma is composed of a collection of ions, electrons, and unionized neutrals, with a macroscopic spatial and temporal scale, commonly referred to as the fourth state of matter. Plasmas can be classified into thermal equilibrium plasmas and non-thermal equilibrium plasmas according to whether the gas temperature and the electron temperature are equal or not. The gas temperature of the thermal equilibrium plasma coincides with the temperature of the electrons, typically produced by nuclear fusion reactions. The temperature of the electrons of the non-thermal equilibrium plasma can be as high as tens of thousands of degrees celsius, while the gas temperature is much lower than the electron temperature and can even be kept around room temperature.
In practical applications, the non-thermal equilibrium plasma is generally generated by ionizing gas molecules or atoms under atmospheric pressure or low pressure by using high voltage. In the process of generating non-thermal equilibrium plasma, electric field, ultraviolet radiation, heat energy and various active particles are often generated, and meanwhile, the non-thermal equilibrium plasma has a low gas temperature, so that the non-thermal equilibrium plasma has wide attention in recent years in the application prospect of industrial application fields such as material modification, surface treatment and the like and the plasma biomedical field.
The electric field is one of important active components generated by the non-thermal equilibrium plasma, and the electric field exists in and around the non-thermal equilibrium plasma. Electric fields have a wide range of applications in daily life, and in addition to the conventional electric field, novel non-thermal sterilization techniques based on electric fields and electroporation techniques are also gradually applied to the biomedical field.
The conventional electric field generating device has a complex structure, and generally comprises a high voltage power supply, a transformer, a control loop and various electrodes with different geometric structures, and the electric field is generally limited in a limited space between two electrodes (such as patent documents CN108686837A and CN203787768U), which greatly limits the application range of the electric field.
The current non-thermal equilibrium plasma generating device has been capable of generating various types of non-thermal equilibrium plasma under atmospheric pressure and is widely used in the research of plasma biomedicine (such as a plasma jet device described in patent document CN101426327A, and a handheld plasma torch described in patent document CN 102523674A). However, these conventional devices cannot separate the electric field from many active components of the non-thermal equilibrium plasma, and on the other hand, the characteristics (such as humidity) of the object to be processed may adversely affect the plasma electric field. This is a problem that is currently urgently solved by plasma biomedicine.
Disclosure of Invention
In view of the defects of the prior art, the present invention aims to provide a plasma-based electric field separation apparatus, which aims to solve the problem that the application range of plasma is narrow because the electric field cannot be separated from the plasma in the prior art.
To achieve the above object, the present invention provides a plasma-based electric field separating apparatus, comprising: an insulating base plate and a conductive electrode;
one end of the conducting electrode penetrates through the through hole on the insulating bottom plate to be fixed; the conductive electrode is used for separating an electric field generated by the plasma jet from the plasma jet; the insulating bottom plate is used for isolating active ingredients in the plasma;
In the working state, the number of the conductive electrodes is equal to that of the plasma jet flow and corresponds to that of the plasma jet flow one by one.
Preferably, the insulating base plate is a teflon alkoxy resin.
Preferably, the number of the conductive electrodes is 1 or more, and when the number of the conductive electrodes is 1 or more, the arrangement is linear or circular or polygonal.
Preferably, the conductive electrode is a needle electrode, the material of which is stainless steel, copper, aluminum or tungsten.
Preferably, the plasma jet generating device comprises a power supply, a current limiting resistor and a high-voltage electrode;
the power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the conducting electrode;
the power supply is used for providing voltage for generating plasma jet; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma jet when discharging;
when the number of the high voltage electrodes is more than 1, the separated electric field distribution can be adjusted by adjusting the distance between each high voltage electrode and the conducting electrode.
The plasma jet generating device also comprises a second conductive polar plate which is arranged between the power supply and the current-limiting resistor and is used for providing an electrical interface for the current-limiting resistor.
The plasma jet generating device comprises a power supply, a high-voltage electrode, a working gas source and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides a gas for plasma jet generation; the power supply is connected with the high-voltage electrode and is used for providing voltage for the generation of plasma jet; the high-voltage electrode is used for generating plasma jet when discharging;
when the number of the high voltage electrodes is more than 1, the separated electric field distribution can be adjusted by adjusting the distance between each high voltage electrode and the conducting electrode.
The plasma jet generating device also comprises a second conductive polar plate which is arranged between the power supply and the high-voltage electrode and is used for providing an electrical interface for the high-voltage electrode;
the invention provides another plasma-based electric field separation device, which comprises an insulating bottom plate, a conductive electrode and a first conductive polar plate, wherein the insulating bottom plate is provided with a first conductive electrode;
the upper surface of the first conductive polar plate is contacted with the plasma, one end of the conductive electrode is connected with the lower bottom surface of the first conductive polar plate, and the other end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed;
the first conducting electrode plate is in contact with the plasma and is used for providing an electrical interface for the conducting electrode; the conductive electrode is used for separating an electric field generated by the plasma from the plasma; the insulating substrate serves to insulate the active components in the plasma.
Preferably, the plasma comprises a plasma jet or a non-jet low temperature plasma;
when the plasma is in the form of a jet, the present invention is applicable in a context including: the number of the conductive electrodes is 1 and the number of the plasma jet is more than or equal to 1; or the number of plasma jets is 1 and the number of conductive electrodes is greater than 1; or the number of plasma jets and the number of conductive electrodes are both greater than 1 and are not equal in number.
Preferably, the insulating base plate is glass or teflon alkoxy resin.
Preferably, the number of the conductive electrodes is 1 or more, and when the number of the conductive electrodes is 1 or more, the arrangement is linear or circular or polygonal.
Preferably, the conductive electrode is a needle electrode, the material of which is stainless steel, copper, aluminum or tungsten.
Preferably, the plasma generating device comprises a power supply, a current limiting resistor and a high voltage electrode;
the power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the first conductive polar plate;
the power supply is used for providing voltage for generating plasma jet; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma during discharging;
When the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
The plasma generating device also comprises a second conductive polar plate which is arranged between the power supply and the current-limiting resistor and is used for providing an electrical interface for the current-limiting resistor.
The plasma generating device comprises a power supply, a high-voltage electrode, a working gas source and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides a plasma generating gas; the power supply is connected with one end of the high-voltage electrode and used for providing voltage for the generation of the plasma; the other end of the high-voltage electrode is opposite to the first conductive polar plate and is used for generating plasma during discharging;
when the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
The plasma generating device also comprises a second conductive polar plate which is arranged between the power supply and the high-voltage electrode and is used for providing an electrical interface for the high-voltage electrode;
through the technical scheme, compared with the prior art, the invention can obtain the following advantages
Has the advantages that:
1. The electric field separation device based on the plasma adopts the insulating bottom plate to isolate a plurality of active components contained in the plasma, and simultaneously adopts the conductive electrode to separate the electric field generated by the plasma from the plasma jet; on one hand, the non-equilibrium plasma can be applied to occasions which only need to utilize the electric field effect and need to avoid possible or toxic and side effects of other active particles, for example, when tissues such as cells and the like are directly treated by the plasma, the possible instantaneous high temperature of the plasma can generate harmful effects on the cells; on the other hand, the problem that the characteristics (such as humidity) of the processed object are interfered with the electric field of the plasma when the plasma processing is directly applied in practical application is solved. The advantages are directly widened application range of the non-thermal equilibrium plasma.
2. The insulating base plate is made of polytetrafluoroethylene alkoxy resin and can be adjusted according to any shape of the surface of the object to be processed, so that the application scene of the electric field separation device based on the plasma can be not limited to the case that the object to be processed is a plane.
3. When the number of the high-voltage electrodes is more than 1, the separated electric field distribution can be adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode, and the size of the electric field at the designated position can be further changed.
4. If the invention needs to be applied to the scene of active particles, only the through hole is added on the insulating bottom plate to enable the active particles to reach the surface of the treated object, thereby not only widening the application scene, but also being convenient to operate.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a radial sectional view of the bottom surface of the insulating base plate according to the first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a fourth embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a fifth embodiment of the present invention;
FIG. 7(a) is a schematic view showing an arrangement of pin-shaped conductive electrodes and ground electrodes on the bottom surface of an insulating base plate according to the present invention;
FIG. 7(b) is a schematic view of an insulating substrate with additional vias using active particles according to the present invention;
description of the drawings:
1-a power supply; 2-protective resistance; 3-a second conductive plate; 4-high voltage wire; 5-a current limiting resistor; 6-high voltage electrode; 7-an insulating medium; 8-insulating top plate; 9-plasma jet; 10-a conductive electrode; 11-an insulating support; 12-an insulating base plate; 13-a ground electrode; 14-a first conductive plate; 15-insulating medium tube; 16-a source of working gas; 17-gas flow control switch; 18-an insulating medium; 19-a first medium pipe; 20-a second medium pipe; 21-a first vent; 22-a second vent; 23-through hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a plasma-based electric field separation device, which comprises: an insulating base plate and a conductive electrode;
one end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed; the conductive electrode is used for separating an electric field generated by the plasma jet from the plasma jet; the insulating bottom plate is used for isolating active ingredients in the plasma;
in the working state, the number of the conductive electrodes is equal to that of the plasma jet flow and corresponds to that of the plasma jet flow one by one.
Preferably, the insulating base plate is made of polytetrafluoroethylene alkoxy resin; the number of the conductive electrodes is more than or equal to 1, and when the number of the conductive electrodes is more than 1, the arrangement mode is linear or circular or polygonal.
Preferably, the high voltage electrode is a needle electrode, and the material of the needle electrode is stainless steel, copper, aluminum or tungsten.
Preferably, the plasma jet generating device comprises: the power supply, the current-limiting resistor and the high-voltage electrode;
The power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the conductive electrode;
the power supply is used for providing voltage for generating plasma jet; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma jet when discharging;
when the number of the high voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high voltage electrode and the conducting electrode.
Preferably, the plasma jet generating device comprises a power supply, a high-voltage electrode, a working gas source and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides gas for plasma jet generation; the power supply is connected with the high-voltage electrode and is used for providing voltage for the generation of plasma jet; the high-voltage electrode is used for generating plasma jet when discharging;
when the number of the high voltage electrodes is more than 1, the separated electric field distribution is adjusted by respectively adjusting the distance between each high voltage electrode and the conductive electrode.
The electric field separation device based on the plasma is suitable for the condition that the number of plasma jet flows is the same as that of the conducting electrodes, when the plasma is in a non-jet form, such as creeping discharge plasma generated by dielectric barrier discharge, and when the number of the plasma jet flows is not consistent with that of the conducting electrodes, waste of the plasma or waste of the conducting electrodes can occur, particularly when the number of the plasma jet flows is 1, stable distribution of output of a plurality of electric fields cannot be realized, and the number of electric ports is limited.
Based on the above drawbacks, the present invention provides another plasma-based electric field separation device, including: the device comprises an insulating bottom plate, a conducting electrode and a first conducting polar plate;
the upper surface of the first conductive polar plate is contacted with the plasma, one end of the conductive electrode is connected with the lower bottom surface of the first conductive polar plate, and the other end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed;
the first conducting electrode plate is in contact with the plasma and is used for providing an electrical interface for the conducting electrode; the conductive electrode is used for separating an electric field generated by the plasma from the plasma; the insulating substrate serves to insulate the active components in the plasma.
The plasma is a low temperature plasma including a plasma jet or a non-jet.
When the plasma is in the form of a jet, the present invention is applicable in a context including: the number of the conductive electrodes is 1 and the number of the plasma jet is more than or equal to 1; or the number of plasma jets is 1 and the number of conductive electrodes is greater than 1; or the number of plasma jets and the number of conductive electrodes are both greater than 1 and are not equal in number.
Preferably, the insulating base plate is made of polytetrafluoroethylene alkoxy resin; the number of the conductive electrodes is more than or equal to 1, and when the number of the conductive electrodes is more than 1, the arrangement mode is linear, circular or polygonal.
Preferably, the plasma generating apparatus includes: the power supply, the current-limiting resistor and the high-voltage electrode;
the power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the first conductive polar plate;
the power supply is used for providing voltage for generating plasma jet; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma during discharging;
when the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
Preferably, the plasma generating device comprises a power supply, a high-voltage electrode, a working gas source and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides a plasma generating gas; the power supply is connected with one end of the high-voltage electrode and is used for providing voltage for the generation of the plasma; the other end of the high-voltage electrode is opposite to the first conductive polar plate and is used for generating plasma during discharging;
when the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
The first conductive polar plate is adopted to redistribute the generated plasma electric field again and provide a required electric interface, so that the problem of inconsistent numbers of plasma jet and conductive electrodes is effectively solved, and the application range of the plasma jet-flow-type electric field redistribution device is wider.
As shown in fig. 1, the first embodiment of the present invention provides a plasma-based electric field separation apparatus, which includes a plasma generation module and an electric field separation module;
the plasma generation module comprises a direct current power supply 1, a protective resistor 2, a second conductive polar plate 3, a high-voltage lead 4, a current-limiting resistor 5, a high-voltage electrode 6 and an insulating medium 7; the direct current power supply 1 is connected with a second conductive polar plate 3 through a protective resistor 2; the second conductive plate is made of copper, and 25 high-voltage resistant current-limiting resistors 5 which are arranged in a 5 multiplied by 5 mode are connected below the second conductive plate through a high-voltage lead 4; a high-voltage electrode 6 is connected below each current-limiting resistor 5; the current limiting resistor 5 and the high-voltage electrode 6 are used together as an independent discharge unit and fixed in an insulating medium 7; the tip of the high-voltage electrode 6 vertically penetrates through a through hole in an insulating top plate 8 of the electric field separation module, and the tip generates plasma 9 during discharging;
the electric field separation module comprises an insulating bracket 11, an insulating top plate 8, an insulating bottom plate 12, a conducting electrode 10 and a grounding electrode 13; the strip-shaped insulating bracket 11 is connected with the insulating top plate 8 and the insulating bottom plate 12; through holes with the same number and the same arrangement mode as the high-voltage pin electrodes are reserved on the insulating top plate 8; 25 stainless steel needle-shaped conductive electrodes 10 are distributed on the insulating base plate 12 in a manner consistent with the arrangement of the high-voltage electrodes 6; the grounding electrode 13 is fixed on the bottom surface of the insulating bottom plate 12 around the conductive electrode 10 and is flush with the bottom surface, and the grounding electrode 13 is grounded through a grounding wire; the length of the conducting electrode is 0.5 cm-10 cm;
In this embodiment, the resistance values of the protection resistor 2 and the current limiting resistor 5 are 100M Ω, and the output voltage of the dc power supply 1 is 12 kV; the insulating medium 7, the insulating support 11, the insulating top plate 8 and the insulating bottom plate 12 are all made of polytetrafluoroethylene alkoxy resin; when the plasma is in work, an electric field generated by the air plasma 9 is led out from the plasma through the conductive electrode 10, and other active ingredients such as ultraviolet radiation and active particles generated by the plasma are blocked by the insulating bottom plate 12; the conductive electrode 10 can be directly contacted with the skin of the human body, and the generated relatively uniform electric field can directly treat the skin tissue of the human body for generating the electroporation effect; the gap between the insulating top plate 8 and the insulating bottom plate 12 is an interval for generating plasma jet; the gap can be an open space and is directly contacted with the external part, and an insulating baffle can be added around the insulating top plate 8 and the insulating bottom plate 12 to form a closed space; the height of the gap is 0.5 cm-2 cm;
fig. 2 is a radial sectional view of the bottom surface of the insulating base plate according to the first embodiment of the present invention, and a metal ground electrode 13 is arranged around the conductive electrode 10, fixed to the lower bottom surface of the insulating base plate 12 and finally grounded through a ground line;
fig. 3 is a second embodiment of the present invention, when a strong electric field needs to be generated in a designated area and the influence on the electric field at other positions is reduced as much as possible, the distance between a high voltage electrode and a corresponding conductive electrode can be changed by adjusting the length of a high voltage wire 4 connected between a current-limiting resistor and a second conductive plate, so as to change the size of the electric field at the designated position; the structure schematic diagram of the embodiment is basically the same as that of the first embodiment, the gap between the middle row of high-voltage electrodes 6 and the conducting electrode 10 is reduced only by adjusting the length of the conducting wire, and finally, the electric field distribution with high field intensity in the middle area and low field intensity in the surrounding area can be obtained, so that the operation is very convenient;
FIG. 4 is a third embodiment of the present invention, which can be used when it is required to generate an electric field in a narrow and long region; compared with the first two embodiments, the embodiment adds a first conductive plate 14 on the upper surface of the insulating base plate 12, and a single needle-shaped conductive electrode 10 is led out from the first conductive plate 14, and the proper length and cross-sectional shape of the conductive electrode 10 can be selected according to requirements; alternatively, as shown in fig. 4, the upper half of the conductive electrode 10 may be optionally wrapped with an insulating dielectric tube 15;
fig. 5 shows a fourth embodiment of the present invention, and when the surface of the object to be processed is a curved surface, the shape of the insulating base plate 12 can be changed to meet the application requirements. In this embodiment, the insulating base plate 12 is an arc-shaped curved surface, and can be used for processing an object with a cylindrical curved surface;
note that, when the object to be processed itself is well grounded, the ground electrode 13 in the above embodiment may be omitted.
Fig. 6 shows a fifth embodiment of the present invention, which has good compatibility, and the plasma generating module in the device can be most of the existing non-thermal equilibrium plasma devices. In this embodiment, the plasma generation module is changed into a very common inert gas plasma jet device at present, the ac power supply 1 is connected with the rod-shaped high voltage electrode 6, the high voltage electrode 6 is wrapped by the second medium tube 20 with a sealed single end, the gas flow control switch 17 controls the working gas of the working gas source 16 to enter the first medium tube 19, and the plasma jet 9 generated by discharge enters the electric field separation module to contact the first conductive electrode plate 14; 5 linear needle-shaped conductive electrodes 10 are connected below the first conductive plate 14; the area between the insulating top plate 8 and the insulating bottom plate 12 is connected by an insulating medium 18 to form a closed chamber, the left side and the right side are provided with vent holes 21 and 22, and different types of working gas can be introduced according to the requirement; the ground electrode 12 is not required in this embodiment; it should be noted that the discharge unit composed of the rod-shaped high voltage electrode 6, the first medium pipe 19 and the second medium pipe 20 in this embodiment may also replace the discharge unit composed of the current limiting resistor 5 and the high voltage electrode 6, and generate the plurality of plasma jets to contact the first conductive electrode plate 14.
Fig. 7(a) shows another arrangement of pin-shaped conductive electrodes 10 and ground electrodes 13 on the bottom surface of an insulating substrate 12 that can be used in all of the above embodiments, and fig. 7(b) shows additional through holes 23 in the insulating substrate to allow active particles to pass through the substrate for applications requiring simultaneous use of active particles.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A plasma-based electric field separation device, comprising: an insulating base plate and a conductive electrode;
one end of the conducting electrode penetrates through the through hole on the insulating bottom plate to be fixed; the conductive electrode is used for separating an electric field generated by the plasma jet from the plasma jet; the insulating bottom plate is used for isolating active ingredients in the plasma;
in the working state, the number of the conductive electrodes is equal to that of the plasma jet flow and corresponds to that of the plasma jet flow one by one.
2. The electric field separation device of claim 1, wherein the insulating base plate is a polytetrafluoroethylene alkoxy resin; the number of the conducting electrodes is more than or equal to 1, and when the number of the conducting electrodes is more than 1, the conducting electrodes are arranged in a linear or circular or polygonal mode.
3. An electric field separation device according to claim 1 or 2, wherein the conductive electrode is a needle electrode made of stainless steel, copper, aluminum or tungsten.
4. An electric field separating device as claimed in any one of claims 1 to 3, characterized in that the plasma jet generating device comprises: the power supply, the current-limiting resistor and the high-voltage electrode;
the power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the conductive electrode;
the power supply is used for providing voltage for generating plasma jet; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma jet when discharging;
and when the number of the high-voltage electrodes is more than 1, adjusting the separated electric field distribution by adjusting the distance between each high-voltage electrode and the conductive electrode.
5. An electric field separation device according to any one of claims 1 to 3, wherein the plasma jet generating means comprises a power supply, a high voltage electrode, a source of working gas and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides a gas for plasma jet generation; the power supply is connected with the high-voltage electrode and is used for providing voltage for the generation of plasma jet; the high-voltage electrode is used for generating plasma jet when discharging;
And when the number of the high-voltage electrodes is more than 1, adjusting the separated electric field distribution by respectively adjusting the distance between each high-voltage electrode and the conductive electrode.
6. A plasma-based electric field separation device, comprising: the device comprises an insulating bottom plate, a conducting electrode and a first conducting polar plate;
the upper surface of the first conductive polar plate is contacted with the plasma, one end of the conductive electrode is connected with the lower bottom surface of the first conductive polar plate, and the other end of the conductive electrode penetrates through the through hole on the insulating bottom plate to be fixed;
the first conductive electrode plate is in contact with the plasma and is used for providing an electrical interface for the conductive electrode; the conductive electrode is used for separating an electric field generated by the plasma from the plasma; the insulating substrate is used for isolating active ingredients in plasma.
7. The electric field separation device of claim 6, wherein the plasma comprises a plasma jet or a non-jet low temperature plasma.
8. An electric field separation device according to claim 6 or 7, wherein the insulating base plate is a polytetrafluoroethylene alkoxy resin; the number of the conducting electrodes is more than or equal to 1, and when the number of the conducting electrodes is more than 1, the conducting electrodes are arranged in a linear or circular or polygonal mode.
9. An electric field separating apparatus as claimed in any one of claims 6 to 8, wherein said plasma generating means comprises: the power supply, the current-limiting resistor and the high-voltage electrode;
the power supply is positioned at one end of the current-limiting resistor, the other end of the current-limiting resistor is connected with one end of the high-voltage electrode, and the other end of the high-voltage electrode is opposite to the first conductive polar plate;
the power supply is used for providing voltage for generating plasma; the current limiting resistor is used for controlling the current in the discharging process; the high-voltage electrode is used for generating plasma during discharging;
when the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
10. An electric field separation device according to any one of claims 6 to 8, wherein the plasma generating device comprises a power supply, a high voltage electrode, a working gas source and a gas flow control switch;
the gas flow control switch is used for adjusting the gas flow of the working gas source; the working gas source provides a plasma generating gas; the power supply is connected with one end of the high-voltage electrode and used for providing voltage for the generation of the plasma; the other end of the high-voltage electrode is opposite to the first conductive polar plate and is used for generating plasma during discharging;
When the number of the high-voltage electrodes is more than 1, the separated electric field distribution is adjusted by adjusting the distance between each high-voltage electrode and the conducting electrode.
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| CN112961264A (en) * | 2021-03-01 | 2021-06-15 | 华中科技大学 | Chitosan-gallic acid graft copolymer and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112961264A (en) * | 2021-03-01 | 2021-06-15 | 华中科技大学 | Chitosan-gallic acid graft copolymer and preparation method and application thereof |
| CN112961264B (en) * | 2021-03-01 | 2022-05-03 | 华中科技大学 | Chitosan-gallic acid graft copolymer and preparation method and application thereof |
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