Resistant and Flexible Coating for Foldable Displays

Resistant and Flexible Coating for Foldable Displays

Author: Georg R. Meseck

The development of protective covers for flexible displays requires a combination of properties that are often found to be incompatible with each other. In this context, it has been particularly challenging to simultaneously obtain glass-like wear resistance, plastic-like flexibility, and high optical transparency.

Dongchan Jang and Byeong-Soo Bae, Korea Advanced Institute of Science and Technology (KAIST), Daejon, Republic of Korea, and colleagues have used a molecular hybridization approach to successfully address this problem. First, the researchers synthesized a highly cross-linked cycloaliphatic epoxy-functionalized oligosiloxane (CEOS), in which a ladder-like silsesquioxane is the predominant species. The CEOS building blocks were then polymerized via the epoxy groups by a combination of UV curing and moisture annealing.

The team applied a 50 µm thick coating of their material to a plastic film, which yielded a bendable composite (10,000 bending cycles without fracture) with outstanding wear resistance. The researchers attribute the performance of their material to the inorganic-organic hybrid structure and highlight the simplicity of their method, as well as the possibility to scale up the synthesis.


 

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