▎ 摘　　要

NOVELTY - Coating composition comprises: a graphene oxide; and a solvent, where at least one of a carboxy and an epoxide of the graphene oxide is functionalized by an amine, and the amine has an activation energy to an epoxide of the graphene oxide of -3 to 8 kcal/mol. USE - The coating composition is useful for: forming a stacked structure; and manufacturing OLED display device (all claimed). ADVANTAGE - The composition: improves a surface roughness and a transmittance uniformity of a graphene oxide coating layer; reduces required thickness of the barrier adhesion layer; prevents a wrinkle of the barrier adhesion layer, and undesired bonding of a carrier substrate and a flexible substrate; improves a barrier adhesion layer, uniformity of a barrier adhesion layer; and reduces a surface roughness of the barrier adhesion layer. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) forming (m1) a stacked structure, comprising forming a first coating layer by providing a first coating composition including a positively electric-charged graphene oxide on a substrate, and forming a second coating layer by providing a second coating composition including a negatively electric-charged graphene oxide on the substrate, where the second coating layer is interlayer-bonded to the first coating layer by electrostatic force, at least one of a carboxy and an epoxide of the positively electric-charged graphene oxide is functionalized by an amine, the amine has an activation energy to an epoxide of graphene oxide of -3 to 8 kcal/mol, a zeta potential of the first coating composition is +30 to +60 mV, and a solution conductivity of the first coating composition is 0.001-0.05 mS/cm; and (2) manufacturing (m2) a display device, comprising forming a first graphene oxide layer by providing a first coating composition including a positively electric-charged graphene oxide on a carrier substrate (100), forming a second graphene oxide layer by providing a second coating composition including a negatively electric-charged graphene oxide on the carrier substrate, where the graphene oxide layer is interlayer-bonded to the first graphene oxide layer by electrostatic force, forming a flexible substrate (200) on a barrier adhesion layer (110) including the first graphene oxide layer and the second graphene oxide layer, forming a display element part on the flexible substrate, forming a protective film (400) on the display element part, and separating the flexible substrate from the carrier substrate. DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of separating a flexible substrate from a carrier substrate. Carrier substrate (100) Barrier adhesion layer (110) Flexible substrate (200) Protective film (400) Fixing stage (500)