Abstract The protective bronze film was prepared by mixing the reaction product of oligosaccharide (COS) and modified tannic acid (TA) with polyvinyl alcohol polyethylene glycol. Chloroacetic to carboxylate TA used generate sodium tannate. N,N’-Dicyclohexylcarbodiumide (DCC)/1-Hydroxybenzotriazole (HOBt) as a condensing agent form an amide bond between carboxylic amine COS-TA. synthesized chara...
