Demonstration of 3D geometric shape-memory materials with tunable afterglow at high temperatures. (IMAGE)

Science China Press

Demonstration of 3D geometric shape-memory materials with tunable afterglow at high temperatures.

Caption

(a) Schematic illustration of the components of the shape memory polymer and the diagram of 3D butterflies fabricated by increasing photo-crosslinking time. Phosphorescent spectra (b), emission decay curves (c) and DSC curves (d) of Cor-EP with different photo-crosslinking time of 365 nm UV light. (e) Time-dependent wing opening angles (°) of Cor-EP-4, Cor-EP-15, Cor-EP-60 at 200 °C, respectively. (f) Wing opening angle and luminance changes of Cor-EP-60 at 200 °C in 60 times shape-memory cycles. (g) Demonstrations of the wing opening angles and luminescent properties of 3D butterflies Cor-EP-4, Cor-EP-60 at 35 and 200 °C, respectively. Cor-EP-4, Cor-EP-15 and Cor-EP-60 mean Cor-EP samples are photo-crosslinked for 4, 15 and 60 s, respectively. Scale bar, 10 mm. Data are presented as mean values ± SD, n = 3.

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