Fig. 4: Spider silk-like loading bearing, moisture sensitivity, damping-yet-elastic properties of PANa-PAM-400% fibers.
a Schematic illustration of spider silk hanging its body for self-protection and a photo of the biomimetic fiber hanging a static load of 1 kg (right). b Stretching rate-dependent stress-strain curves and (c) yield stress and elastic modulus of the biomimetic fiber. The dots of different colors represent the measured data points of three. Error bars are presented as mean ± standard deviation from n = 3 independent samples. d The effect of relative humidity on water retention capability of spider silk48 and the biomimetic fiber. e Cyclic stress-strain curves of the biomimetic fiber within 20–100% strain. f The dissipated energy and damping capacity within 20–100% strain. g The cyclic stress-strain curves with and without moisture treatment. h Time-dependent impact force oscillations of a free-falling object from different heights damped by the biomimetic fiber.
