▎ 摘　　要

NOVELTY - Preparing graphene oxide (GO)-poly(2,2'-(p-oxydiphenylene)-5,5'-benzimidazole) (OPBI) composite material film comprises e.g. (i) preparing dimethyl sulfoxide solution of graphene oxide: adding graphene oxide into deionized water, ultrasonically dispersing, adding dimethyl sulfoxide into the GO aqueous solution and stirring, then distilling, then centrifuging, (ii) synthesizing polyether benzimidazole: adding 5 mmol of N,N-dimethyl-4-phenylazoaniline (DAB) and 4,4'-dicarboxydiphenyl ether (DCDPE) into three-mouth flask, and reacting, (iii) preparation of GO/OPBI composite material film. USE - The method is useful for preparing graphene oxide-poly(2,2-(p-oxydiphenylene)-5,5'-benzimidazole) composite material film (claimed). ADVANTAGE - The method can improves the mechanical performance of the OPBI by comprehensive GO, provides the possibility to use under more severe environment is PBI material. DETAILED DESCRIPTION - Preparing graphene oxide (GO)-poly(2,2'-(p-oxydiphenylene)-5,5'-benzimidazole) (OPBI) composite material film comprises (i) preparing dimethyl sulfoxide solution of graphene oxide: adding 0.1 g graphene oxide into 50 ml deionized water, ultrasonically dispersing for 1 hour, adding 100 ml of dimethyl sulfoxide into the obtained GO aqueous solution and stirring for 1 hour, then distilling under reduced pressure to remove the water in the mixing liquid until partial dimethyl sulfoxide, then centrifuging the obtained GO/dimethyl sulfoxide solution under the rotating speed of 3000 rotations/minute (rpm) for 30 minutes to obtain the uniformly dispersed GO organic solution, (ii) synthesizing polyether benzimidazole: adding 5 mmol of N,N-dimethyl-4-phenylazoaniline (DAB) and 4,4'-dicarboxydiphenyl ether (DCDPE) into 100 ml three-mouth flask, and adding 45 g poly(n-propyl methacrylate) (PPMA), heating to 140 degrees C, stirring and reacting for 40 minutes under the nitrogen atmosphere, then precipitating the product into ice water, then washing with 5% sodium bicarbonate solution for 24 hours, then using de-ionized water to wash for 24 hours, drying to obtain the target product, and (iii) preparation of GO/OPBI composite material film: using the composite material the OPBI solid, adding into the GO/dimethyl sulfoxide solution to obtain the GO content 0.5 wt %, magnetically stirring until it is dissolving completely, then cast on a smooth glass plate, drying at 80 degrees C for 12 hours, and then washing the dry film in water bath at 60 degrees C for 12 hours, removing the solvent completely, and finally drying at 80 degrees C for 12 hours.