▎ 摘　　要

NOVELTY - Preparing polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide composite material comprises e.g. (i) drying octaamino cage polysilsesquioxane, stirring in methanol solution, heating with graphene oxide, centrifuging and drying to obtain octaamino-cage polysilsesquioxane-modified graphene oxide; (ii) heating caprolactam, 6-aminocaproic acid, and octaamino cage-type polysilsesquioxane modified graphene oxide to obtain a polyamide 6/octaamino cage polysilsesquioxane polymer; (iii) cutting the synthesized polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide polymer, heating and drying; (iv) pulverizing small pieces; (v) drying; and (vi) placing the polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide sheet on the friction tester, adjusting the test parameters, and testing its friction coefficient, adjusting the experimental parameters, and testing its mechanical properties. USE - The method is useful for preparing new polyamide 6/eight amino cage type polysilsesquioxane modified oxidized graphene composite material. ADVANTAGE - The method provides inorganic-organic combined wear-resistant nylon composite material having excellent friction performance and mechanical property. DETAILED DESCRIPTION - Preparing polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide composite material comprises (i) drying octaamino cage polysilsesquioxane in a vacuum oven (50degrees Celsius for 24 hours), adding octaamino cage polysilsesquioxane into methanol solution, stirring for 30 minutes under ultrasonic condition for 30 minutes, adding graphene oxide into methanol solution under ultrasonic condition for 60 minutes, mixing the methanol solution containing octaamino-cage polysilsesquioxane and graphene oxide, heating the mixed solution to 60degrees Celsius, stirring mechanically for 5 hours, centrifuging in a centrifuge to obtain a solution, pouring out clear solution, rinsing repeatedly with deionized water, repeating process for 6 times to remove the unreacted cage-type polysilsesquioxane, and drying the product in an oven at 80degrees Celsius for 24 hours to obtain octaamino-cage polysilsesquioxane-modified graphene oxide; (ii) adding caprolactam, 6-aminocaproic acid, and octaamino cage-type polysilsesquioxane modified graphene oxide into the four-necked flask, turning on the condensed water, starting feeding nitrogen for 5 minutes, heating it to melt, stirring, heating, melting the medicine, increasing the voltage by a small grid every 10-20 minutes, heating continuously to 220degrees Celsius at constant temperature reaction for 1-2 hours, heating gradually to 250-270degrees Celsius, performing the constant temperature reaction for 4-5 hours, pouring the polymer out from the reaction vessel to obtain a polyamide 6/octaamino cage polysilsesquioxane polymer, and turning off nitrogen and cold water; (iii) cutting the synthesized polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide polymer into small pieces with scissors, adding in a beaker and deionized water until the polymer is covered, placing the beaker in an oil bath, heating it to 110degrees Celsius for 1 hour, pouring out the water in the beaker, re-adding deionized water for boiling, repeating for 3-5 times to remove unreacted caprolactam, and drying in 60degrees Celsius oven for 6-8 hours; (iv) adding the polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide polymer small pieces into the pulverizer and pulverizing them into fine particles; (v) injecting the pellets into flakes and dumbbell-shaped flakes using a microinjector, placing the flakes in ethanol, sonicating with an ultrasonic machine for 2 hours, and placing in an oven at 80degrees Celsius for 12 hours; and (vi) placing the polyamide 6/octaamino cage polysilsesquioxane modified graphene oxide sheet on the friction tester, adjusting the test parameters, and testing its friction coefficient, adding the dumbbell-shaped polyamide 6/modified graphene oxide into the universal testing machine, adjusting the experimental parameters, and testing its mechanical properties.