Recently, flexible devices, composed of conductive materials layered on polymer film substrates, have gained significant attention in the field of liquid crystal and other displays [1]. A major challenge in the development of such devices is low bending durability, as conductive materials degrade under bending strain. To address the issue, we designed a triple-layered film, composed of two hard polymeric film layers and a soft intermediate layer. We also developed a laser light diffraction-based method for accurately measuring the surface strain in bent materials [2,3]. In this study, we fabricated triple-layer films and measured their surface bending strain using this method to evaluate their bending behavior. Furthermore, we calculated the bending strain by FEM simulation and compared with experimental data.
References: [1] W.-B. Luo et al., Battery Energy, 3, 20230061 (2024). [2] A. Shishido et al., Sci. Rep. 4, 5377 (2014). [3] A. Shishido et al., Adv. Mater. Interfaces, 8, 2001662 (2021).

Recently, flexible devices, composed of conductive materials layered on polymer film substrates, have gained significant attention in the field of liquid crystal and other displays [1]. A major challenge in the development of such devices is low bending durability, as conductive materials degrade under bending strain. To address the issue, we designed a triple-layered film, composed of two hard polymeric film layers and a soft intermediate layer. We also developed a laser light diffraction-based method for accurately measuring the surface strain in bent materials [2,3]. In this study, we fabricated triple-layer films and measured their surface bending strain using this method to evaluate their bending behavior. Furthermore, we calculated the bending strain by FEM simulation and compared with experimental data.
References: [1] W.-B. Luo et al., Battery Energy, 3, 20230061 (2024). [2] A. Shishido et al., Sci. Rep. 4, 5377 (2014). [3] A. Shishido et al., Adv. Mater. Interfaces, 8, 2001662 (2021).