CN105153441B - It is a kind of to accelerate the method that epoxide resin material surface charge dissipates - Google Patents
It is a kind of to accelerate the method that epoxide resin material surface charge dissipates Download PDFInfo
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Abstract
Accelerate the method that epoxide resin material surface charge dissipates the present invention relates to a kind of, belong to electric material insulation technology field.The method of the invention comprises the following steps：Step 1, dielectric barrier discharge plasma processing unit is assembled；Step 2, epoxide resin material is cleaned, dried；Step 3, the epoxide resin material after cleaning-drying is positioned on lower block media；Gas is passed through by air inlet, high voltage power supply discharge voltage amplitude is between 10kV~30kV, and frequency produces uniform and stable electric discharge between 500Hz~3000Hz, discharge plasma processing is carried out to the epoxide resin material, processing time is 10s~10min.The method of the invention is accelerated epoxide resin material surface charge and dissipated, and processing time is short, and equipment therefor is simple in construction, with low cost, and without using chemical reagent, environmental pollution is small.
Description
Technical field
Accelerate the method that epoxide resin material surface charge dissipates the present invention relates to a kind of, belong to electric material insulation technology
Field.
Background technology
Epoxy resin composite material have it is excellent be electrically insulated, mechanical and corrosion-resistant etc. characteristic, therefore be widely used
In industrial circles such as coating, electronic apparatus and Aero-Space.Wherein, the insulator device made using epoxy resin composite material
Part, due to higher insulating properties and mechanical property, being widely used in gas-insulated switchgear (GIS)
On.However, these equipment currently used in the market, mostly based on ac transmission, applied to going back under D.C. high voltage transmission
It is fewer.It is generally believed that compared under AC field, surface Charge is easier Accumulating charge under DC electric field, this meeting
Cause surface field to distort, so as to trigger edge flashing, cause accident.With greatly developing for extra-high voltage direct-current transmission,
Develop with relevant voltage grade matches, the equipment that safe class is high, the focus as current research.
Research in terms of plasma is had been one hundred years of history, and the plasma generator of early stage is mainly used to
Ozone is produced, with going deep into for research, the application field of plasma is constantly being expanded.At present, low temperature plasma by
It is widely used in the fields such as material surface modifying, ozone generation, bio-pharmaceuticals and aviation flowing control.In material surface modifying
Field in, a large amount of high energy electrons, ion and the living radical contained in plasma can cause material surface originalization
Key fracture is learned, new free radical is generated.Recombined between free radical, cross-linked network is formed on surface, and then improve material
Expect surface property.Meanwhile, corona treatment can introduce the oxygen-containing polar groups such as hydroxyl, carbonyl on surface, on the one hand improve
Wettability of the surface, reduces surface water contact angle.Water contact angle reduction causes adsorption moisture content to improve, and increases surface
Electrical conductivity, accelerates the migration of surface charge.On the other hand, the generation of carbonyl can be made into sunken electric charge more with aufhellung surface trap
Plus easily detrapping.
Prior art improves material using method of surface fluorination, ion implanting or incorporation nano particle etc. mostly
Electrical characteristics.Fluorination treatment asphalt mixtures modified by epoxy resin is respectively adopted for the A of the CN 102585165 and A of CN 104371133 patent in application publication number
Fat material.By being passed through a certain proportion of F in reative cell2/N2Mixed gas, the certain temperature of application and pressure, to being positioned over
Material in reative cell carries out fluorination treatment, and one layer of carbon fluorine layer is formed on surface.Due to F2With stronger electronegativity, it can inhale
Draw electronics, therefore in specimen surface formation screen layer, weaken the internal field of specimen surface, suppress the accumulation of surface charge.This
The method of invention is applied to suppress the surface charge accumulation on epoxy resin and its composite electrical insulation, and then improves epoxy
The flashover voltage and electrical insulation properties of resin electric insulation part such as epoxy insulation support and epoxy insulation, and applied to asphalt mixtures modified by epoxy resin
Antistatic surface of the fat material when other side is used.Application publication number is the A of CN 104446650 patent, has applied for one
Plant the method for improving polymer and aluminium oxide ceramics vacuum edge flashing characteristic.This method is drawn using Electron cyclotron resonance ion source
The large area homogeneous beam gone out, is injected into polytetrafluoroethylene (PTFE) or aluminium oxide ceramics insulating materials surface, and insulating materials surface is carried out
It is modified.Implantation Energy is 80keV, and injection ion is N ions and C ions.As a result show, the aluminium oxide ceramics through N ion implantings,
Flashover voltage maximum can improve 50% or so.The present invention can be used for vacuum high-pressure insulating device field.Application publication number is CN
104327456 A patent is using the method that metal nanoparticle is mixed in epoxide resin material, by by least one ring
Oxygen resin material, metal nanoparticle, curing agent and inorganic nanoparticles mixing, produce a kind of insulator and are mixed with epoxy resin
Thing.This mixing material can reduce the space charge accumulation caused during extra-high voltage direct-current transmission, while material can be improved
The bulk conductivity and breakdown strength of material.There are some inventive methods to be related to corona treatment in addition and improve its vacuum edge flashing electricity
The content of pressure.Application publication number is the A of CN 103834052 patent, has applied for that a kind of corona treatment insulating materials is improved
Method of the vacuum along the pressure-resistant performance in face.This method use using metal electrode under the pulse power excitation electric discharge produce low temperature etc. from
Daughter, hydrophobic surface structure is formed on lucite surface.Corona treatment changes lucite insulating materials surface
Roughness and surface can, modification reduces surface second electron emission coefficiency, so as to improve lucite under vacuum
Along the pressure-resistant performance in face.This inventive method shows the validity of plasma modification.
From above-mentioned summary, it is currently used in quickening surface charge and dissipates, suppressing the method for charge buildup mainly includes table
Face fluorination, ion implanting, incorporation nano particle etc..Surface fluorination technical pattern is complicated, high to environmental requirement.Fluorine gas is to have poison gas
Body, cost is higher, easily occurs leaking and causing safety problem in reaction, there is certain contaminative to environment.In ion implantation
Equipment manufacturing cost is expensive, and production cost is high, the uniformity in ion implantation process it is difficult to ensure that, therefore be not suitable for industrial metaplasia
Production.Mix nano particle technology process structure complicated, due to needing to use a variety of chemical reagent during doping, be easily caused environment
Pollution.In addition, many kinds of substance is blended, the more difficult control of uniformity of mixture.In view of the shortcomings of the prior art, this method is using low
Isothermal plasma processing material surface is used to accelerate surface charge dissipation.Because plasma device is simple in construction, it can reduce
Production cost, action time is short, shortens the production cycle.In addition, corona treatment is without chemical solvent, environmental pollution shadow
Ring small, process control high, therefore further can develop to industrialization direction.
The content of the invention
Accelerate the method that epoxide resin material surface charge dissipates it is an object of the invention to provide a kind of, in experiment intracavitary
Low Temperature Plasma Treating epoxide resin material surface is produced using dielectric barrier discharge, is used as absolutely with improving epoxide resin material
The electrical insulation capability of edge part.
To achieve the above object, the present invention is adopted the technical scheme that：
It is a kind of to accelerate the method that epoxide resin material surface charge dissipates, comprise the following steps：
Step 1, dielectric barrier discharge plasma processing unit is assembled, described device includes：
High voltage power supply, its output end measures voltage by high-voltage probe, and by oscillograph recording, the high voltage power supply is
Microsecond pulse power supply, high frequency and high voltage power supply or nanosecond pulse power supply；
Top electrode and bottom electrode are provided with discharge cavity, the discharge cavity, the Top electrode connects the high voltage power supply output
End, the bottom electrode ground connection；Block media and lower block media are additionally provided with, laminating respectively is positioned over the Top electrode and lower electricity
On extremely, and space is left between the upper block media and lower block media；The discharge cavity further respectively has air inlet and gone out
Gas port；
Step 2, the epoxide resin material is cleaned, dried；
Step 3, the epoxide resin material after cleaning-drying is positioned on the lower block media, adjusted on described
The distance between block media and lower block media；Gas is passed through by the air inlet, the high voltage power supply is opened, it is described
High voltage power supply discharge voltage amplitude is between 10kV~30kV, and frequency produces uniform and stable put between 500Hz~3000Hz
Electricity, discharge plasma processing is carried out to the epoxide resin material, and processing time is 10s~10min.
Further, the discharge cavity is made by stainless steel, in the discharge cavity air pressure range be 20 handkerchiefs to 200 kPas it
Between, air pressure preferred atmosphere pressure or low pressure in the discharge cavity.
Further, the pressure in the discharge cavity passes through gauge measurement.
Further, the gas being passed through is the mixed gas of air or inert gas and oxygen.
Further, when the gas being passed through is the mixed gas of inert gas and oxygen, the gas outlet connection is true
Empty pump.
Further, the Top electrode and bottom electrode are disc electrode, the Top electrode and bottom electrode a diameter of 10~
100mm, material is aluminium, copper or stainless steel.
Further, the upper block media and lower block media are K9 glass, polytetrafluoro or lucite.
Further, the upper block media and lower block media are shaped as circular or square, and its cross-sectional area is more than
The cross-sectional area of the Top electrode or bottom electrode, thickness is 1~4mm.
Further, the epoxide resin material size is 5 × 5cm, and thickness is 1~5mm.
Further, step 2 includes：
Step 2.1, the epoxide resin material is cleaned using deionized water and acetone successively；
Step 2.2, the epoxide resin material is positioned in ultrasonic washing instrument and be cleaned by ultrasonic, it is described to remove
The greasy dirt and impurity on epoxide resin material surface；
Step 2.3, the epoxide resin material is put into low temperature drying in vacuum drying chamber.
Further, the distance between the upper block media and lower block media are adjusted by pad.
The use corona treatment epoxide resin material that the present invention is provided, is disappeared with accelerating epoxide resin material surface charge
The advantage of scattered method is：
1) discharging structure is board-to-board structure, by adjusting discharge parameter, higher stability can be realized, to material list
Face carries out large-area treatment；
2) compared to technologies such as surface fluorinations, processing time is shorter, typically only needs to tens seconds between a few minutes
Reach obvious effect；
3) plasma device is simple in construction, and reaction controllability is high, and production cost is relatively low；
4) plasma treatment procedure is without using chemical reagent, and environmental pollution is small, meets environmentally friendly demand for development.
Brief description of the drawings
Fig. 1 is dielectric barrier discharge plasma processing device structure diagram of the present invention；
Fig. 2 is surface potential measurement apparatus structure schematic diagram of the present invention；
Surface potential measurement result figure when Fig. 3 A are undressed epoxide resin material pressurization 1min；
Fig. 3 B are that undressed epoxide resin material removes surface potential measurement result figure when pressing initial；
Fig. 3 C are surface potential measurement result figure when undressed epoxide resin material removes pressure 20min；
Fig. 4 A be the epoxide resin material handled through the method for the invention pressurize 1min when surface potential measurement result figure；
Fig. 4 B are that the epoxide resin material handled through the method for the invention removes surface potential measurement result figure when pressing initial；
Fig. 4 C are surface potential measurement result when the epoxide resin material handled through the method for the invention removes pressure 20min
Figure.
Wherein, it is electric under 1- high voltage power supplies, 2- discharge cavities, 3- high-voltage probes, 4- oscillographs, 5- gases, 6- Top electrodes, 7-
Block media under pole, the upper block medias of 8-, 9-, 10- air inlets, 11- gas outlets, 12- vavuum pumps, 13- pressure gauges, 14- steppings
Motor, 15- electrostatic voltmeters, 16- plane electrodes, 17- electrostatic probe, 18- dc sources, 19- computers.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with embodiment and
Accompanying drawing, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain this
Invention, is not intended to limit the present invention.
It is a kind of to accelerate the method that epoxide resin material surface charge dissipates, comprise the following steps：
Step 1, dielectric barrier discharge plasma processing unit is assembled, as shown in figure 1, described device includes：
Microsecond pulse power supply 1, its output end measures voltage by high-voltage probe 3, and is recorded by oscillograph 4；
Discharge cavity 2, the discharge cavity 2 is made by stainless steel, and air pressure range is 20 handkerchiefs to 200 kPas in the discharge cavity 2
Between, the pressure in the discharge cavity 2 is measured by pressure gauge 13.Top electrode 6 and bottom electrode 7, institute are provided with the discharge cavity 2
State Top electrode 6 and connect the output end of microsecond pulse power supply 1, the bottom electrode 7 is grounded；It is additionally provided with block media 8 and lower resistance
Keep off medium 9, laminating respectively is positioned on the Top electrode 6 and bottom electrode 7, and the upper block media 8 and lower block media 9 it
Between leave space；The discharge cavity 2 further respectively has air inlet 10 and gas outlet 11；The gas being passed through is inert gas and oxygen
Mixed gas when, the gas outlet 11 connects vavuum pump 12, for pumping gas washing.
Step 2, the thick epoxide resin materials of 6 pieces of 2mm are chosen, every 3 pieces are one group, the epoxide resin material is cleaned,
Dry；
Specially：
Step 2.1, the epoxide resin material is cleaned using deionized water and acetone successively；
Step 2.2, the epoxide resin material is positioned in ultrasonic washing instrument and be cleaned by ultrasonic；
Step 2.3, the epoxide resin material is put into low temperature drying in vacuum drying chamber.
Step 3, the epoxide resin material after cleaning-drying is positioned on the lower block media, adjusted by pad
Save the distance between the upper block media and lower block media；Experiment is carried out under atmospheric air, by the microsecond pulse
Power supply 1 is opened, the discharge voltage of microsecond pulse power supply 1 be 20kV, repetition rate be 1kHz between, choose one group of material 3
Block sample, corona treatment is carried out to the epoxide resin material respectively, and processing time is 180s.Another set material is not located
Reason, is used as control.Epoxide resin material after processing is positioned in dry sealing vacuum bag, and be numbered.
Surface potential measurement device is as shown in Figure 2.Measurement apparatus mainly includes stepper motor 14, electrostatic probe 17, plane
Electrode 16, the device of electrostatic voltmeter 15.By detected materials horizontal positioned, from two block length 30mm, wide 15mm, thick 1.5mm gold
Belong to plane electrode 16 to charge to material surface.The side of metallic planar electrodes 16 is polished in arc-shaped, and two metals are put down
Face electrode 16, which is fitted, is positioned over the upper surface of processed material, two electrodes one termination high-voltage DC power supply 18, other end ground connection.Two
The distance that metallic planar electrodes 16 are spaced is scanning area.Electrostatic probe 17 is suspended in by region to be scanned by metallic support
Top, 17 distance from bottom material surface 2mm of electrostatic probe or so.Electrostatic probe 17 other ends connection model Trek347's is quiet
Piezoelectric voltage table 15, for recording surface current potential.Electrostatic voltmeter 15 is connected on computer 18 by capture card, can complete data
Gatherer process.Metallic support is connected on stepper motor 14, and electrostatic probe 17 is controlled in material by relative motion control software
Two-dimensional scan campaign is made on material surface, completes the single pass process used time about 36s.During measurement surface current potential, HVDC is opened
Power supply 18 charges to material surface, application -3kV DC voltage, after pressurization 1min, in the case where keeping voltage to material
Surface carries out live line measurement, after single pass is completed, voltage is removed immediately, is then scanned again, can obtain removing pressure
Surface potential distribution when initial.A period of time after pressure is removed, material surface current potential is scanned for the third time.It is generally believed that material
Material upper surface charge density is approximately proportional to the value of surface potential, therefore, and polarity and the size of surface potential reflect simultaneously
The characteristic variations of surface charge.Surface potential measurement experiment is in 26 DEG C of temperature, and relative humidity is carried out for 45% time.
The thick epoxide resin materials of undressed 2mm are measured respectively and intracavitary is tested under atmospheric air uses medium
Epoxide resin material thick barrier discharge processing 2mm, wherein discharge voltage 20kV, repetition rate 1kHz, block media thickness
1mm, discharging gap is apart from 2mm, processing time 180s, takes 3 pieces of samples to be tested under the conditions of every group.
For the thick epoxide resin materials of undressed 2mm, using surface potential measurement device shown in Fig. 2, apply-
3kV DC voltages, respectively to pressurization 1min, remove that pressure is initial, remove tri- kinds of moment lower surface current potentials of 20min after pressure is scanned, table
Face Potential distribution is as shown in Fig. 3 A, 3B, 3C.Along X-axis side it is ground electrode in Fig. 3 A, 3B, 3C, the opposite side relative with X-axis be
High-field electrode.As can be seen that there is pinnacle at two near ground electrode and high-field electrode from Fig. 3 A, 3B, 3C, and it is middle
Region is close to plane.Remove after pressure, close to two electrodes, nearby surface potential decay is very fast, two electrode centers region surface current potentials
Decay is slower.By 20min decay, close to ground electrode side current potential close to 0, and one is still gathered in two electrode centers regions
Fixed surface charge.
For testing the epoxide resin material that intracavitary handles 2mm thickness using dielectric barrier discharge under atmospheric air, adopt
With surface potential measurement device shown in Fig. 2, application -3kV DC voltages, respectively to pressurization 1min, remove that pressure is initial, remove 2min after pressure
Three kinds of moment lower surface current potentials are scanned, and surface potential is distributed as shown in Fig. 4 A, 4B, 4C.As a result show, material surface passes through
The distribution of its surface potential is clearly distinguishable from untreated samples after corona treatment.After pressurization 1min, surface potential distribution is in
Uniform inclined plane, removes surface potential when pressing initial and decays rapidly.After 2min, material surface is scanned again, surface
Current potential is essentially 0.As a result show, its plasma treated more untreated surface charge of material, which dissipates, to be accelerated.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (9)
1. a kind of accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that comprises the following steps：
Step 1, dielectric barrier discharge plasma processing unit is assembled, described device includes：
High voltage power supply (1), its output end measures voltage by high-voltage probe (3), and is recorded by oscillograph (4), the high pressure
Power supply (1) is microsecond pulse power supply or nanosecond pulse power supply；
Top electrode (6) and bottom electrode (7) are provided with discharge cavity (2), the discharge cavity (2), the Top electrode (6) connects the height
Voltage source (1) output end, bottom electrode (7) ground connection；Block media (8) and lower block media (9) are additionally provided with, is fitted respectively
It is positioned in the Top electrode (6) and bottom electrode (7), and sky is left between the upper block media (8) and lower block media (9)
Gap；The discharge cavity (2) further respectively has air inlet (10) and gas outlet (11)；
Step 2, the epoxide resin material is cleaned, dried；
Step 3, the epoxide resin material after cleaning-drying is positioned on the lower block media (9), adjusted on described
The distance between block media (8) and lower block media (9)；Gas (5) is passed through by the air inlet (10), by the high pressure
Power supply (1) open, high voltage power supply (1) the discharge voltage amplitude between 10kV~30kV, frequency 500Hz~3000Hz it
Between, discharge plasma processing is carried out to the epoxide resin material, processing time is 10s~10min.
2. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that described to put
Electric chamber (2) is made by stainless steel, and the interior air pressure range of the discharge cavity (2) is 20 handkerchiefs between 200 kPas, the discharge cavity (2)
Interior pressure is measured by pressure gauge (13).
3. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that described logical
The gas (5) entered is the mixed gas of air or inert gas and oxygen.
4. according to claim 3 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that described logical
When the gas (5) entered is the mixed gas of inert gas and oxygen, gas outlet (11) the connection vavuum pump (12).
5. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that on described
Electrode (6) and bottom electrode (7) are disc electrode, and a diameter of 10~100mm, material is aluminium, copper or stainless steel.
6. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that on described
Block media (8) and lower block media (9) are K9 glass, polytetrafluoro or lucite.
7. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that on described
Being shaped as block media (8) and lower block media (9) is circular or square, its cross-sectional area be more than the Top electrode (6) or under
The cross-sectional area of electrode (7), thickness is 1~4mm.
8. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that step 2
Including：
Step 2.1, the epoxide resin material is cleaned using deionized water and acetone successively；
Step 2.2, the epoxide resin material is positioned in ultrasonic washing instrument and be cleaned by ultrasonic；
Step 2.3, the epoxide resin material is put into low temperature drying in vacuum drying chamber.
9. according to claim 1 accelerate the method that epoxide resin material surface charge dissipates, it is characterised in that on described
The distance between block media (8) and lower block media (9) are adjusted by pad.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106132056B (en) * | 2016-07-01 | 2019-01-01 | 中国科学院电工研究所 | Plasma jet device and the method for inhibiting epoxy resin surface charge buildup |
| CN107326331A (en) * | 2017-05-27 | 2017-11-07 | 国网湖北省电力公司检修公司 | A kind of process for improving epoxy resins insulation Work tool surface dielectric performance |
| CN108565081A (en) * | 2018-04-04 | 2018-09-21 | 西安交通大学 | A method of for improving solid dielectric insulation vacuum edge flashing performance |
| CN110286271A (en) * | 2019-06-14 | 2019-09-27 | 中国科学院电工研究所 | A kind of measuring system, method and the analysis method of dielectric surface charge properties |
| CN110331373A (en) * | 2019-07-04 | 2019-10-15 | 国家电网有限公司 | A kind of device and method for realizing the regulation of solid insulation surface conductivity |
| CN111273135B (en) * | 2020-02-07 | 2021-09-07 | 西安交通大学 | System and method for measuring dielectric barrier discharge characteristics under airflow regulation |
| CN112341645B (en) * | 2020-10-29 | 2022-09-30 | 广州大学 | Method for enhancing conductive performance of carbon nanotube epoxy resin composite material by jet plasma |
| CN112888129A (en) * | 2020-12-14 | 2021-06-01 | 北京东方计量测试研究所 | Modulation method and device for homogenizing atmospheric gas discharge |
| CN112616235B (en) * | 2021-01-14 | 2023-06-30 | 深圳大学 | Application of two-dimensional titanium carbon in generating atmospheric pressure uniform dielectric barrier discharge |
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| CN103841741A (en) * | 2014-03-12 | 2014-06-04 | 中国科学院电工研究所 | Barometric pressure plasma generator based on dielectric barrier discharge |
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