Visualization of Metastable Stress States in Soft Polymers Using Non-Close-Packed Photonic Crystals
발표자
오치영 (아주대학교)
연구책임자
심태섭 (아주대학교)
공동저자
오치영 (아주대학교), 심태섭 (아주대학교)
초록
내용
Metastable stress states in soft polymers arise from viscoelastic deformation and delayed stress relaxation but are difficult to visualize directly. Here, non-close-packed photonic crystals are fabricated by melt-shear assembly of core-shell colloidal particles within a soft polymer matrix, where shear-induced ordering defines the photonic structure. Unlike close-packed crystals, the non-close-packed architecture allows stress-induced deformation without lattice locking, enabling continuous optical responses to mechanical history. The resulting films exhibit mechanochromic color changes under external mechanical loading. By tuning the core-shell architecture to impart shape memory behavior, metastable stress states can be optically visualized through time-dependent structural color relaxation.