▎ 摘　　要

NOVELTY - Preparing outer sheath of tensile-stretch instrument cable involves stirring graphene oxide, polyvinyl alcohol, and toluene, performing ultrasonic dispersion, and under the protection of nitrogen, thionyl chloride is added dropwise, and the mixture is stirred at a high temperature, toluene and thionyl chloride are distilled off, and pyridine is added to continue stirring to obtain a preform a. The chlorinated butyl rubber, polyurethane rubber, nitrile silicone rubber are mixed and preform a, anti-aging agent ODA, anti-aging agent BLE are added to knead to obtain the preform b. USE - Method for preparing outer sheath of tensile-stretch instrument cable. DETAILED DESCRIPTION - Preparing outer sheath of tensile-stretch instrument cable involves stirring graphene oxide, polyvinyl alcohol, and toluene, performing ultrasonic dispersion, and under the protection of nitrogen, thionyl chloride is added dropwise, and the mixture is stirred at a high temperature, toluene and thionyl chloride are distilled off, and pyridine is added to continue stirring to obtain a preform a. The chlorinated butyl rubber, polyurethane rubber, nitrile silicone rubber are mixed and preform a, anti-aging agent ODA, anti-aging agent BLE are added to knead to obtain the preform b. The tert-butyl hydroperoxide, diethylene triamine is added to the preform b. Calcium sulfate whisker, hard clay, nano white carbon, zeolite powder, sepiolite powder, yttrium oxide, barium chloride are added for smelting, vulcanization after molding is performed to obtain instrument cable outer sheath. The weight ratio of graphene oxide, polyvinyl alcohol, toluene, thionyl chloride, and pyridine is 4-8:10-16:100-140:4-8:0.2-0.4.