Modification method and system of aluminum nitride filler for electrical engineering epoxy resin
A technology of epoxy resin and aluminum nitride, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve the problems of surface damage of samples, difficulty in applying irregular shaped epoxy resin, limitations, etc. Achieve the effects of reducing charge accumulation, facilitating large-scale industrial production and application, and improving the surface charge dissipation speed
Active Publication Date: 2019-03-29
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +3
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Problems solved by technology
The plasma surface treatment method is difficult to apply to irregular-shaped epoxy resin, and there is some damage to the surface of the treated sample. The current modification method is limited in practical engineering applications.
Method used
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specific Embodiment 1
[0070] (1) Select micron-sized aluminum nitride as the filler, place the filler in a drying oven, set the temperature of the drying oven at 30°C, and heat for 6 hours;
[0071] (2) Place the micron aluminum nitride particles treated in step (1) in figure 2 In the shown quartz plasma reactor, glass rods are used to evenly spread aluminum nitride, and the upper end of the quartz plasma reactor is placed with a quartz glass cover plate and sandwiched between flat electrodes. Ar and CF are introduced into the reactor. 4 Mixed gas, high-frequency sinusoidal voltage is applied between the electrodes, and the micron aluminum nitride filler is modified by plasma fluorination.
[0072] (3) Take the processed aluminum nitride filler 0.7g, epoxy resin 10g, curing agent 3.3g, coupling agent 0.5g, mix, place the mixture in a magnetic stirrer and heat to 50-80°C for 5min, stir The rotation speed of the machine was set at 1000-1500r / min, and the stirred mixture was vacuum-degassed and pour...
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The invention discloses a modification method and system of aluminum nitride filler for electrical engineering epoxy resin. The method includes: placing aluminum nitride filler in a drying box and performing heating to obtain first aluminum nitride filler; placing the first aluminum nitride filler in a quartz plasma reaction kettle for plasma fluorination modification treatment to obtain second aluminum nitride filler; and mixing the second aluminum nitride filler, epoxy resin, a curing agent and a coupling agent, then conducting vacuum degassing and heating curing, thus obtaining the electrical engineering epoxy resin. The method or system provided by the invention can realize controllable and efficient fluorination modification treatment on epoxy resin filler, also has no need for a sealed gas environment, and is not limited by the material size and shape, and is convenient for realization of industrial large-scale application.
Description
technical field [0001] The invention relates to the field of preparation of electrical materials, in particular to an aluminum nitride filler modification method and system for electrical epoxy resins. Background technique [0002] In the DC GIL, there is a phenomenon of surface charge accumulation at the interface between the insulator and the gas inside the cavity. Since the direction of the electric field remains unchanged under DC voltage, the surface charge is difficult to dissipate. A large amount of accumulated charges will cause the electric field near the insulator to be distorted. It will lead to discharge or even surface flashover of the insulator, which seriously threatens the safe and stable operation of DC GIL equipment. At present, the GIL projects that have been put into operation in the world often adopt the method of reducing the operating voltage to increase the insulation margin to ensure the reliability of the equipment. The higher insulation margin is u...
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Patent Timeline
Login to View More IPC IPC(8): C08L63/00C08K9/00C08K3/28C09C1/40C09C3/04
CPCC08K3/28C08K9/00C08K2003/282C09C1/40C09C3/048C08L63/00
Inventor 律方成谢庆詹振宇郝留成闫纪源林生军张启哲张红恩阮浩鸥
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)