584 / 2022-03-30 15:13:20

Study on self-healing properties of electric branches of epoxy polymer containing dynamic chemical bonds

High Voltage，,Insulating material,Self repair,Electric branches

Study on self-healing properties of electric branches of epoxy polymer containing dynamic chemical bonds

Shuangjian Wang，Mingxiao Zhu,Jiming Chen,Chunsong Chen,Tingxin Chen,Xiaobo Guo

China University Of Petroleum

931590220@qq.com

Purpose/Aim

With the rapid development of society, people pay more and more attention to the safety and durability of electrical equipment in power equipment, insulation materials play a crucial role in the current environment so it is very important to study the electrical performance of insulation materials in the current environment and select the appropriate insulation materials for the safe and stable operation of power equipment.Insulation surface ruptures, generate electricity the branches and even the situation is particularly common breakdown So this study intends to choose good electrical properties and mechanical properties of epoxy resin as the insulation material, through the introduction of dynamic chemical bonds has the better electrical performance and dangerous conditions such as surface crack, the problems such as electric breakdown to the effects of a timely repair.

Experimental/Modeling methods

Selection for dynamic chemical bond epoxy sample preparation: contain disulfide bond, hydrogen bond or DA bond, under certain conditions, in contrast to the epoxy, the chemical bond is introduced into the epoxy, have been finished these samples of the dielectric constant, dielectric loss, breakdown voltage and to investigate the dynamic effects of chemical bond types on the electrical performance.A measuring platform for corona aging of electric branches of epoxy resin was built to measure its surface oxidation performance, observe and record its self-healing effect and measure its leakage current. Fourier Transform infrared spectrometer (FTIR), Hydrogen Nuclear Magnetic Resonance spectroscopy (HNMR), Differential Scanning Calorimetry (DSC) and other methods were used to characterize the physical and chemical properties and mechanism of the material.

Results/discussion

The prepared samples were tested for self-repair of electrical branches.The test shows that the sample can reach a certain degree of repair after a certain time at a certain temperature.

Conclusions

In this experiment, a smart material with self-healing ability is prepared by introducing dynamic chemical bonds into epoxy resin materials. By rapidly and accurately repairing the micro-cracks and breakdown faults inside the material, the working life of polymer materials is significantly prolonged so as to give full play to the excellent properties of the material itself.