A highly transparent, colorless optical film with outstanding mechanical strength and folding reliability using mismatched charge-transfer complex intensification.
발표자
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초록
내용
A novel transparent, colorless optical film based on fluorinated polyimide is prepared using the concept of charge-transfer complex (CTC) intensification. The resulting film has a tensile modulus of 10.26 GPa, total transmittance of approximately 90%, and yellow index below 3, which is the best-recorded balance between mechanical strength and optical properties. Unlike commercially available optical-grade engineering plastic films and glass substrates, the prepared film has both excellent pencil hardness (3H grade) and superior folding reliability (over 300,000 folding/unfolding cycles) at a radius of 1.5 mm. These remarkable properties are attributed to a unique supramolecular structure with multiple hydrogen bonding and salt complexation interactions, which exhibits CTC intensification. Furthermore, we propose a mechanism to explain the idea of CTC intensification and explore the relationship between the mechanical properties of the optical film and those of the display surface.