Figure 5.
(a) The design of the ladder with two hinges. (b) Each hinge contains a reversible component. (c) The printed ladder. (d) After swelling for 10 h in low temperature water, it was bent into a bench shape, then heated to 75 °C, and then cooled to room temperature. (e) The bench is hard and can withstand a load of 50 g. (f) When the bench is placed in high temperature water (75 °C), the curved shape is restored. The scale bars represent 20 mm [70]. Copyright (2016) Springer Nature.