Fig. 4: Elasticity and durability of PPM and A-PPM fibers.
From: Biomimetic strong and tough MXene fibers with synergy between micropores and dual interfaces
a Loading-unloading tensile curves of stretched A-PPM fiber at an initial 20% strain and upon stretching to 23-26% strain. b Five loading-unloading cycles of A-PPM fiber between 20% and 26% tensile strain. c Photographs of a 3-cm-long A-PPM fiber stretched from 20% to 26% strain and then recovered to 20% strain. d Relative resistance changes as a function of tensile strain for PPM and A-PPM fibers. e Changes in the current carrying capacity as a function of tensile strain for pure MXene, PPM, and A-PPM fibers. f Relative resistance changes of an A-PPM fiber over 100000 stretch-release cycles between 20% and 26% strain. g Photographs of a tied A-PPM fiber stretched to form a tight knot, which broke at a point far from the knot. The red rectangle highlights the position of the knot. h Photograph of a tied 6-cm-long A-PPM fiber with a tight knot lifting a load more than 12,000 times greater than its own weight and spinning at 200 rpm. The red circle highlights the position of the knot. (i) Photograph of an embroidered panda made of A-PPM fibers and cotton fibers.
