▎ 摘　　要

NOVELTY - Preparation method of graphene polyimide high temperature resistant flame retardant fiber, which involves: i. adding P-nitrophenol, triethylamine and tetrahydrofuran to the reaction flask, fully stirring and then cooling, adding phenylphosphonyl dichloride, reacting, filtering, washing and then filtering and drying to obtain bis(4-nitrophenoxy base) phenylphosphine oxide; ii. adding bis(4-nitrophenoxy)phenylphosphine oxide and palladium carbon obtained in step 1, and tetrahydrofuran to the autoclave, introducing hydrogen into the autoclave, and carried out, the reaction and then filtering and drying to obtain bis(4-amino) phenoxy) phenylphosphine oxide; iii. mixing bis(4-aminophenoxy)phenylphosphine oxide obtained in step 3 and modifier, graphene oxide solution, 4,4-diaminodiphenyl ether, pyromellitic dianhydride, 3,3,4,4-biphthalic dianhydride, and adding N,N'-dimethylacetamide. USE - Preparation method of graphene polyimide high temperature resistant flame retardant fiber for welding gloves (Claimed). Can also be used for electric welding gloves, electric arc resistant gloves and the like. ADVANTAGE - Preparation method of graphene polyimide high temperature resistant flame retardant fiber has better breaking strength and high temperature resistance. DETAILED DESCRIPTION - Preparation method of graphene polyimide high temperature resistant flame retardant fiber, which involves: i. weighing each raw material in proportion; ii. adding P-nitrophenol, triethylamine and tetrahydrofuran to the reaction flask, fully stirring and then cooling, adding phenylphosphonyl dichloride, reacting, filtering, washing and then filtering and drying to obtain bis(4-nitrophenoxy base) phenylphosphine oxide; iii. adding bis(4-nitrophenoxy)phenylphosphine oxide and palladium carbon obtained in step 2, and tetrahydrofuran to the autoclave, introducing hydrogen into the autoclave, and carried out, the reaction and then filtering and drying to obtain bis(4-amino) phenoxy) phenylphosphine oxide; iv. mixing bis(4-aminophenoxy)phenylphosphine oxide obtained in step 3 and modifier, graphene oxide solution, 4,4-diaminodiphenyl ether, pyromellitic dianhydride, 3,3,4,4-biphthalic dianhydride, and adding N,N'-dimethylacetamide, and preparing spinning solution by stirring and dissolving, and then spinning, and spun silk is sent to the oven through the coagulation bath drying. An INDEPENDENT CLAIM is included for graphene polyimide high temperature resistant flame retardant fiber for electric welding gloves.