Analysis of Interaction between Decomposition Products of C4F7N/CO2 Mixture and Epoxy Resin

Based on the density functional theory, the interaction between the decomposition products of $\mathrm{C}_{4}\mathrm{~F}_{7}\mathrm{~N}/\mathrm{CO}_{2}$, a new type of environmental protection insulating gas, and epoxy resin monomer was studied from the microscopic point of view. The potential adsorption sites of $\mathrm{C}_{4}\mathrm{~F}_{7}\mathrm{~N}/\mathrm{CO}_{2}$ mixture decomposition products and epoxy resin monomer were determined by electrostatic potential analysis. The interaction strength and charge transfer of gas-solid bimolecular model were calculated. The results showed that the adsorption energy of $\mathrm{C}_{4}\mathrm{~F}_{7}\mathrm{~N}/\mathrm{CO}_{2}$ mixture decomposition products and epoxy resin monomer was less than 0.06eV, the charge transfer amount is less than $0.05e$ and the adsorption process was mainly physical adsorption. The interaction strength of gas decomposition products and epoxy resin monomer was weak, and the chemical stability of gas-solid interface was good.