Fig. 3: Tensile, damping, and crack-resistant properties of PDMAEA-Q/PMAA hydrogel microfiber.
a Tensile behavior at different strain rates (RH 60%). b Linear fitting of yield stresses as a function of the natural logarithm of strain rates (ε̇). c Cyclic loading-unloading curves and corresponding damping capacities with increasing strains (strain rate = 0.02 s−1). d Comparison of the damping capacity of the hydrogel microfiber with other typical damping fiber materials. e Time-resolved impact force oscillations of a free-falling object buffered by cotton yarn and the hydrogel microfiber, respectively. f Tensile curves of the microfiber with/without a notch (inset: SEM image of the notched microfiber). g POM images of a notched microfiber as stretched from 0% to 175% strains. The images were taken in the presence of a 530 nm tint plate at the azimuth angles of 45° and −45o, respectively. h Proposed mechanism for crack tolerance. i Comparison of the fracture energies and elongations among the hydrogel microfiber and other materials (data in Supplementary Table 3). Source data are provided as a Source Data file.
