▎ 摘　　要

NOVELTY - Thermally conductive boron nitride-modified polyurea insulating complex material comprises 16-38 pts. wt. boron nitride-graphene oxide complex materials, 4-8 pts. wt. silane coupling agent, 20-25 pts. wt. polyetheramine, 5-9 pts. wt. dibutyl maleate, 10-14 pts. wt. dimethylthiotoluenediamine, and 23-28 pts. wt. hexamethylene diisocyanate trimer. USE - Used as thermally conductive boron nitride-modified polyurea insulating complex material. ADVANTAGE - The method improves the breakdown field strength and volume resistivity of the polyurea material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the thermally conductive boron nitride-modified polyurea insulating complex material, comprising (i) adding 20-25 pts. wt. polyetheramine T5000 into N, N-dimethylformamide solvent, reacting at 60-70 degrees C, adding 5-9 pts. wt. dibutyl maleate dropwise , heating to 85-95 degrees C, reacting for 25-30 hours, distilling off the solvent under reduced pressure to obtain a modified polyetheramine, (ii) adding 10-14 pts. wt. dimethylthiotoluenediamine into the toluene solvent and the modified polyetheramine obtained in the above step (i), reacting at 110-120 degrees C for 5-8 hours, distilling off the solvent under reduced pressure, and obtaining chain extension polyetheramine,and (iii) taking mixed solvent of acetone and ethanol with a volume ratio of 1: 2-3, adding 4-8 pts. wt. silane coupling agent, 16-38 pts. wt. boron nitride-graphene oxide complex material, 23-28 pts. wt. hexamethylene diisocyanate trimer and chain-extended polyetheramine, placing the solution at 70-80 degrees C, performing ultrasonic dispersion treatment for 4-6 hours, where the ultrasonic frequency is 22-28 KHz, and completely evaporating the mixed solvent of acetone and ethanol.