Dual-Amide Engineered Blue Phase Liquid Crystal Elastomers: Synergistic Fatigue Resistance, Programmable...

Blue phase liquid crystal elastomers (BPLCEs) hold significant promise for flexible photonic devices due to their 3D periodic photonic lattices and intrinsic soft-matter characteristics. However, achieving an optimal balance between mechanical resilience and dynamic responsiveness remains a critical challenge. This study introduces a dynamic hydrogen-bonding network design strategy, wherein N,N'-bisacryloylcystamine monomers are incorporated to construct a hierarchical energy dissipation system, yielding BPLCEs with remarkable toughness (1.72 MJ m^{- 3}) and ultralow hysteresis (4.8%). By integrating thermally induced topological bond rearrangement, programmable mechanical gradient films are developed to enable high-precision strain-induced patterning and an adaptive encryption mechanism governed by a "relaxation-concealment/stretching-development" paradigm. Furthermore, leveraging the spatiotemporal gating properties of embedded phosphorescent materials, a dual-mode dynamic verification system is established, facilitating multidimensional information decryption via ultraviolet-triggered rapid visualization and controlled afterglow decay lasting up to 5 s. This study not only mitigates the inherent trade-off between mechanical durability and stimulus responsiveness in soft photonic crystals but also establishes a novel framework for multidimensional synergistic regulation across mechanical, optical, and temporal domains. These findings provide a transformative strategy for advancing next-generation dynamic encryption systems, intelligent sensing technologies, and adaptive photonic displays, paving the way for innovative applications in flexible photonic devices.