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Method for inhibiting accumulation of surface charge of epoxy resin and composite materials thereof

A composite material and epoxy resin technology, applied in the field of electrical insulating materials, can solve the problems of distorted electric field, equipment accident, and the drop of flashover voltage along the surface, and achieve the effect of simple process and mature technology

Inactive Publication Date: 2012-07-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive charge accumulation on the surface of the insulating support will seriously distort the electric field, resulting in a significant drop in flashover voltage along the surface, and even cause breakdown of the insulating support along the surface, leading to equipment accidents

Method used

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  • Method for inhibiting accumulation of surface charge of epoxy resin and composite materials thereof
  • Method for inhibiting accumulation of surface charge of epoxy resin and composite materials thereof
  • Method for inhibiting accumulation of surface charge of epoxy resin and composite materials thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Epoxy resin samples were subjected to gas-phase fluorination in a closed reaction chamber.

[0030] Gas-phase fluoridation treatment conditions: the temperature is 50° C., the volume concentration of fluorine gas in the fluorine / nitrogen gas mixture is 12.5%, the pressure of the reaction gas is 1 bar, and the fluorination treatment time is 30 minutes.

[0031] The surface potential of embodiment 1 sample or the measurement result of surface charge decay and surface conductivity: with the sample (former sample) corona charging without fluorination treatment, have the stable voltage that is almost equal to charging grid voltage (-2kV) Compared with the initial surface potential of the sample, the initial surface potential of the sample in Example 1 after charging is much lower than this charging grid voltage value (-2kV), and the surface potential or surface charge rapidly decays to zero at room temperature (see Figure 4 Example 1 curve in). This and the surface conduct...

Embodiment 2

[0033] Epoxy resin samples were subjected to gas-phase fluorination in a closed reaction chamber.

[0034] Gas-phase fluoridation treatment conditions: the temperature is 55° C., the volume concentration of fluorine gas in the fluorine / nitrogen gas mixture is 20%, the pressure of the reaction gas is 0.2 bar, and the fluorination treatment time is 60 minutes.

[0035] The measurement result of surface potential or surface charge decay and surface conductivity of embodiment 2 sample, please refer to Figure 4 Curve and table 1 in embodiment 2. Similar to the results of the sample in Example 1, the initial surface potential of the sample in Example 2 after charging is also far below the charging grid voltage value (-2kV), and the surface potential or surface charge also rapidly decays to zero at room temperature, The surface conductivity of the sample of Example 2 is also significantly greater than that of the original sample.

Embodiment 3

[0037] Epoxy resin samples were subjected to gas-phase fluorination in a closed reaction chamber.

[0038] Gas-phase fluorination treatment conditions: the temperature is 120° C., the volume concentration of fluorine gas in the fluorine / nitrogen gas mixture is 1%, the pressure of the reaction gas is 2 bar, and the fluorination treatment time is 30 minutes.

[0039] The measurement result of surface potential or surface charge decay and surface conductivity of embodiment 3 sample, please refer to Figure 4 Curve and table 1 in embodiment 3. Similar to the results of the samples of Examples 1 and 2, but its surface potential or surface charge decays faster than the first two, due to its higher surface conductivity (2.6 × 10 -13 [S]).

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Abstract

The invention belongs to the technical field of electrical insulating materials, and relates to an extremely effective method for inhibiting the accumulation of surface charge of epoxy resin and composite materials thereof. The method comprises the following step that the epoxy resin and the composite materials thereof are subject to gas phase fluorination treatment in a closed reaction chamber. The method disclosed by the invention is applied to the inhibition of the accumulation of the surface charge of electrical insulating pieces of the epoxy resin and the composite materials thereof, so as to improve the flashover voltages and the electrical insulating performance of the electrical insulating pieces, such as epoxy insulating supports and epoxy insulators of the epoxy resin and the composite materials thereof, and static electricity resistance of the epoxy resin and the composite materials thereof when the epoxy resin and the composite materials thereof are used in other aspects.

Description

technical field [0001] The invention belongs to the technical field of electrical insulating materials and relates to an extremely effective method for suppressing the accumulation of surface charge of epoxy resin and its composite materials. Background technique [0002] Epoxy resin-based composite materials have been widely used in electrical, electronic, aerospace and other fields due to their excellent electrical insulation, mechanical and thermal properties and chemical stability. In particular, sulfur hexafluoride gas insulated switchgear (GIS) supported by epoxy resin-based composite materials is not affected by the external environment due to its high insulation reliability, small footprint and closed structure. It has been widely used in high voltage alternating current (HVAC) power distribution systems for decades. As we all know, high-voltage direct current (HVDC) transmission has many advantages over HVAC transmission, and its rapid development urgently requires...

Claims

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Application Information

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IPC IPC(8): C08G59/14C08J3/00C08L63/00
Inventor 安振连刘亚强仓俊陈暄张冶文
Owner TONGJI UNIV
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