CN111326299A - Continuous gradient surface fluorination modification device and method for polymer material - Google Patents
Continuous gradient surface fluorination modification device and method for polymer material Download PDFInfo
- Publication number
- CN111326299A CN111326299A CN202010220248.4A CN202010220248A CN111326299A CN 111326299 A CN111326299 A CN 111326299A CN 202010220248 A CN202010220248 A CN 202010220248A CN 111326299 A CN111326299 A CN 111326299A
- Authority
- CN
- China
- Prior art keywords
- reaction kettle
- polymer material
- temperature
- temperature measuring
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
Landscapes
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
The invention discloses a continuous gradient surface fluorination modification device for a polymer material, which comprises a closed reaction kettle, wherein the closed reaction kettle is connected with a gas tank and a tail gas treatment device through a gas leading-in and leading-out pipeline; the temperature measuring probe is positioned in the reaction kettle and connected to a temperature measuring display screen outside the reaction kettle, and the temperature measuring probe and the temperature measuring display screen form a temperature measuring device; the heating devices are fixed at two ends of the polymer sample in the reaction kettle and connected with the temperature control device outside the reaction kettle. Also discloses a modification method, which is mainly characterized in that when the time of the fixed fluorination treatment is T, the corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the polymer material is established, according to T (z), the surface conductivity distribution sigma (z) of the polymer material is obtained, a closed reaction kettle is filled with fluorine gas/nitrogen mixed gas, the time of the fluorination treatment of the polymer material is T, and the temperature is T1‑T2The polymer material with continuous gradient conductivity distribution can be obtained by the fluorination treatment.
Description
Technical Field
The invention belongs to the technical field of insulator surface modification, and particularly relates to a continuous gradient surface fluorination modification device and method for a polymer material.
Background
Direct current gas pipeline transmission (GIL) has been greatly developed in recent years due to its advantages of large transmission capacity, simple line laying, small electromagnetic interference, etc., and the requirements for the performance of insulators have been gradually increased with the rise of voltage classes. In the actual operation process, unipolar charges are easily accumulated on the surface of the insulator under direct current, and the electric field of the unipolar charges is unevenly distributed along the surface, so that insulation faults may be finally caused, and the safe and stable operation of the whole direct current transmission system is threatened. The invention provides a continuous gradient surface fluorination modification device and method for polymer materials, which can realize the regulation and control of the surface conductance distribution of an insulator, can improve the performance of the insulator by a modification method, is simple and easy to operate, has an industrial production prospect, and is expected to play an important role in avoiding insulation faults in an actual system.
Disclosure of Invention
The invention takes an insulator as a research object, and the regulated and controlled characteristic is the surface conductance distribution of a polymer, and aims to provide a polymer modification device and a polymer modification method with continuous fluorinated surface distribution, so that the surface conductance modification of the insulator is realized, the performance of the insulator is improved, and the occurrence of insulation faults is avoided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a continuous gradient surface fluorination modification device for polymer materials comprises the following components: the device comprises a closed reaction kettle, a heating and temperature control device, a temperature measuring device, a gas cylinder, a gas leading-in and leading-out pipeline and a tail gas treatment device; the closed reaction kettle is connected with a gas tank and a tail gas treatment device through a gas leading-in and leading-out pipeline; the temperature measuring probe is positioned in the reaction kettle and connected to a temperature measuring display screen outside the reaction kettle, and the temperature measuring probe and the temperature measuring display screen form a temperature measuring device; the heating devices are fixed at two ends of the polymer sample in the reaction kettle and connected with the temperature control device outside the reaction kettle.
The invention also provides a continuous gradient surface fluorination modification method of the polymer material, which comprises the following steps:
1) insulator polymer material both ends in sealed reaction kettle are fixed to be heated and are adornedRespectively controlling the two end surfaces of the polymer material to keep a set temperature T1And T2(T1≠T2)。
2) After the time t, measuring the surface temperature of n (n is more than or equal to 4) points at equal intervals along the surface from one end to the other end of the polymer by moving the temperature probe, and fitting to obtain the along-surface temperature distribution T (z) of the polymer material, wherein z is the axial coordinate of the polymer material.
3) And when the fixed fluorination treatment time is T, establishing a corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the polymer material, and obtaining the surface conductivity distribution sigma (z) of the polymer material according to T (z).
4) Filling fluorine gas/nitrogen gas mixture into a closed reaction kettle, and carrying out the polymerization on the polymer material for T time and T temperature1～T2The polymer material with continuous gradient conductivity distribution can be obtained by the fluorination treatment.
Advantageous effects
The invention can construct a fluoride layer with continuous gradient distribution conductance on the surface of the insulator. Fig. 2 shows the dc flashover voltages of the original insulator, the uniform fluorinated insulator, and the continuous gradient fluorinated insulator.
Drawings
FIG. 1 shows a continuous gradient fluorination modification operation.
Fig. 2 shows the dc flashover voltages of the original insulator, the uniform fluorinated insulator, and the continuous gradient fluorinated insulator.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
1) Thermocouples are fixed on the upper surface and the lower surface of the insulator in the closed reaction kettle, and the upper surface and the lower surface of the insulator are respectively controlled to keep the set temperature at 40 ℃ and 30 ℃.
2) After 10 minutes, the surface temperature of 5 points on the insulator edge surface at equal intervals is measured by moving a temperature probe, and the insulator edge surface temperature distribution T (z) is obtained after fitting, wherein z is the axial coordinate of the insulator.
3) And when the time of the fixed fluorination treatment is 10 minutes, establishing a corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the insulator, and obtaining the surface conductivity distribution sigma (z) of the insulator according to T (z).
4) Fluorine gas is filled into the closed reaction kettle, the insulator is fluorinated for 10 minutes at the temperature of 40-30 ℃, and the GIL insulator with continuous gradient conductivity distribution can be obtained, the fluorination operation diagram adopting temperature control is shown in figure 1, and the flashover voltage is shown in figure 2 and is far higher than that of the original insulator and is obviously higher than that of the uniform fluorinated insulator.
Example 2
1) Thermocouples are fixed on the upper surface and the lower surface of the insulator in the closed reaction kettle, and the upper surface and the lower surface of the insulator are respectively controlled to keep the set temperature at 50 ℃ and 25 ℃.
2) After 15 minutes, the surface temperature of 5 points on the insulator edge surface at equal intervals is measured by moving a temperature probe, and the insulator edge surface temperature distribution T (z) is obtained after fitting, wherein z is the axial coordinate of the insulator.
3) And when the fixed fluorination treatment time is 15 minutes, establishing a corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the insulator, and obtaining the surface conductivity distribution sigma (z) of the insulator according to T (z).
4) Fluorine gas is filled into the closed reaction kettle, the insulator is subjected to fluorination treatment for 15 minutes at the temperature of 50-25 ℃, and the GIL insulator with continuous gradient conductivity distribution can be obtained, wherein a fluorination operation diagram adopting temperature control is shown in figure 1, and the flashover voltage of the GIL insulator is shown in figure 2 and is far higher than that of the original insulator and is obviously higher than that of the uniform fluorinated insulator.
Example 3
1) Thermocouples are fixed on the upper surface and the lower surface of the insulator in the closed reaction kettle, and the upper surface and the lower surface of the insulator are respectively controlled to keep the set temperature at 35 ℃ and 20 ℃.
2) After 30 minutes, the surface temperature of 7 points on the insulator edge surface at equal intervals is measured by moving a temperature probe, and the insulator edge surface temperature distribution T (z) is obtained after fitting, wherein z is the axial coordinate of the insulator.
3) And when the fluorination treatment time is fixed to be 30 minutes, establishing a corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the insulator, and obtaining the surface conductivity distribution sigma (z) of the insulator according to T (z).
4) Fluorine gas is filled into the closed reaction kettle, the insulator is subjected to fluorination treatment for 30 minutes at the temperature of 35-20 ℃, and the GIL insulator with continuous gradient conductivity distribution can be obtained, wherein a fluorination operation diagram adopting temperature control is shown in figure 1, and the flashover voltage of the GIL insulator is shown in figure 2 and is far higher than that of the original insulator and is obviously higher than that of the uniform fluorinated insulator.
Claims (2)
1. A continuous gradient surface fluorination modification device for polymer materials is characterized by comprising the following components: the device comprises a closed reaction kettle, a heating and temperature control device, a temperature measuring device, a gas leading-in and leading-out pipeline, a gas cylinder and a tail gas treatment device;
the closed reaction kettle is connected with a gas tank and a tail gas treatment device through a gas leading-in and leading-out pipeline; the temperature measuring probe is positioned in the reaction kettle and connected to a temperature measuring display screen outside the reaction kettle, and the temperature measuring probe and the temperature measuring display screen form a temperature measuring device; the heating devices are fixed at two ends of the polymer sample in the reaction kettle and connected with the temperature control device outside the reaction kettle.
2. A continuous gradient surface fluorination modification method for polymer materials is characterized by comprising the following steps:
1) fixing heating devices at two ends of insulator polymer material in a closed reaction kettle, and respectively controlling the surfaces at two ends of the polymer material to keep a set temperature T1And T2Wherein: t is1≠T2；
2) After t time, measuring the surface temperature of n (n is more than or equal to 4) points at equal intervals along the surface from one end to the other end of the polymer by moving a temperature measuring probe, and fitting to obtain the along-surface temperature distribution T (z) of the polymer material, wherein z is the axial coordinate of the polymer material;
3) when the fixed fluorination treatment time is T, establishing a corresponding relation T (sigma) between the fluorination treatment temperature T and the surface conductivity sigma of the polymer material, and obtaining the surface conductivity distribution sigma (z) of the polymer material according to T (z);
4) secret inFilling fluorine gas/nitrogen gas mixture into the closed reaction kettle, and carrying out the polymerization on the polymer material for T time and T temperature1-T2The polymer material with continuous gradient conductivity distribution can be obtained by the fluorination treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220248.4A CN111326299A (en) | 2020-03-25 | 2020-03-25 | Continuous gradient surface fluorination modification device and method for polymer material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010220248.4A CN111326299A (en) | 2020-03-25 | 2020-03-25 | Continuous gradient surface fluorination modification device and method for polymer material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111326299A true CN111326299A (en) | 2020-06-23 |
Family
ID=71173621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010220248.4A Pending CN111326299A (en) | 2020-03-25 | 2020-03-25 | Continuous gradient surface fluorination modification device and method for polymer material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111326299A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922378A (en) * | 1972-08-04 | 1975-11-25 | Medical Evaluation Devices & I | Fluorinated hydrocarbon coating method |
| CN103280280A (en) * | 2013-04-25 | 2013-09-04 | 西北核技术研究所 | Method for improving flashover performance of vacuum edge surface of polymer insulator |
| CN106847422A (en) * | 2017-02-28 | 2017-06-13 | 天津大学 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device and method |
| CN108148218A (en) * | 2017-12-13 | 2018-06-12 | 中国人民解放军空军工程大学 | A kind of surface layer reforming apparatus and method of modifying for extending polyimide media barrier discharge plasma driver service life |
| CN108447630A (en) * | 2018-02-28 | 2018-08-24 | 天津大学 | GIL insulator design methods with the distribution of surface conductance two-dimensional linear gradient |
| CN109659102A (en) * | 2018-12-29 | 2019-04-19 | 天津大学 | GIL insulator flashover voltage improving method based on gas-solid interface electric field optimization |
| CN109767884A (en) * | 2018-12-29 | 2019-05-17 | 南方电网科学研究院有限责任公司 | Manufacturing method of GIL insulator with surface conductance gradient distribution |
| CN109940804A (en) * | 2019-03-06 | 2019-06-28 | 平高集团有限公司 | Disc insulator manufacturing method |
-
2020
- 2020-03-25 CN CN202010220248.4A patent/CN111326299A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3922378A (en) * | 1972-08-04 | 1975-11-25 | Medical Evaluation Devices & I | Fluorinated hydrocarbon coating method |
| CN103280280A (en) * | 2013-04-25 | 2013-09-04 | 西北核技术研究所 | Method for improving flashover performance of vacuum edge surface of polymer insulator |
| CN106847422A (en) * | 2017-02-28 | 2017-06-13 | 天津大学 | Direct current cables annex silicon rubber insulation surface molecules structure regulating device and method |
| CN108148218A (en) * | 2017-12-13 | 2018-06-12 | 中国人民解放军空军工程大学 | A kind of surface layer reforming apparatus and method of modifying for extending polyimide media barrier discharge plasma driver service life |
| CN108447630A (en) * | 2018-02-28 | 2018-08-24 | 天津大学 | GIL insulator design methods with the distribution of surface conductance two-dimensional linear gradient |
| CN109659102A (en) * | 2018-12-29 | 2019-04-19 | 天津大学 | GIL insulator flashover voltage improving method based on gas-solid interface electric field optimization |
| CN109767884A (en) * | 2018-12-29 | 2019-05-17 | 南方电网科学研究院有限责任公司 | Manufacturing method of GIL insulator with surface conductance gradient distribution |
| CN109940804A (en) * | 2019-03-06 | 2019-06-28 | 平高集团有限公司 | Disc insulator manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Vu et al. | Correlating conductivity and space charge measurements in multi-dielectrics under various electrical and thermal stresses | |
| Zhang et al. | Charge transport dynamics and the effects on electrical tree degradation under DC voltages in thermally aged silicone rubber | |
| Xue et al. | A novel sight for understanding surface charging phenomena on downsized HVDC GIL spacers with non-uniform conductivity | |
| Wang et al. | Research on the non-linear conductivity characteristics of nano-sic silicone rubber composites | |
| Zhang et al. | Thermal gradient effects on surface charge of HVDC spacer in gas insulated system | |
| Muslim et al. | Electrical characterization of dibenzyltoluene liquid at high temperatures up to 350° C | |
| Han et al. | Electrical tree in HTV silicone rubber with temperature gradient under repetitive pulse voltage | |
| CN102543323A (en) | Staging dielectric constant composite insulator | |
| Suzuki et al. | Space charge accumulation and electric breakdown in XLPE under DC high electric field | |
| CN111326299A (en) | Continuous gradient surface fluorination modification device and method for polymer material | |
| Li et al. | Space Charge and Electric Field Dependent on Polarity Reversal of HVDC Cable Insulation | |
| Wang et al. | The effect of temperature gradient on space charge accumulation at SR/XLPE interface under DC stress | |
| Hascoat et al. | Study and analysis of conduction mechanisms and space charge accumulation phenomena under high applied DC electric field in XLPE for HVDC cable application | |
| CN111037819B (en) | Preparation method of epoxy insulation composite material with improved static dissipation characteristic | |
| CN111460642B (en) | High-voltage GIL gas-solid interface electric field distribution optimization method | |
| Guo et al. | Research on application of nonlinear insulation composites in cable termination | |
| Zhou et al. | Conductivity current and electric breakdown properties of thermally aged nano silicone rubber | |
| Wang et al. | Influence of charge emission behaviors of semi-conductive shielding layer on charge accumulation properties of insulation layer for HVDC cable | |
| Yin et al. | Surface Electrical Performance of Polytetrafluoroethylene and Epoxy Resin under Arc Ablation | |
| Sima et al. | Development and distribution of surface charge on epoxy resin under dc electric field in different gases | |
| Li et al. | Research on Nonlinear EPDM for±525kV HVDC Cable Accessories | |
| Yang et al. | Mechanism of superior charge suppression behavior of Si3N4 ceramics at solid-gas interface | |
| Häring et al. | Apparent DC conductivity of silicone rubber compounds | |
| Backhaus et al. | Fundamental aspects of the electric conductivity in insulating materials and the conclusions on diagnosis | |
| CN111505452B (en) | Insulating material surface electrification experimental method based on high-voltage pulse superposition direct-current voltage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200623 |