fig5
Figure 5. Mechanisms of responsive variation in stiffness of the films. (A) Water-triggered stiffening of shape-memory polyurethane due to chain rearrangement and enhanced microphase separation. Copyright 2022, John Wiley and Sons[125]; (B) 3D printing porous films in response to temperature and water caused by microphase separation. Copyright 2024, Springer Nature[79].
