Figure 7.

Nanofiber stretchable hydrogels made from aramid nanofibers and polyvinyl alcohol polymer. (a) Photographs of the polymer solutions and their mixing before electrospinning. (b) A hydrogel under tension with 0% (left) and 300% (right) tensile strains. Scale bar: 10 mm. (c) A hydrogel containing much less polyvinyl alcohol with (right) and without (left) a compressive load of 10 N. Scale bar: 30 mm. (d) The same sample in (c) with (right) and without (left) a tensile load of 10 N. Scale bar: 50 mm. (e) An SEM image of the same sample in (c) after drying. Scale bar: 300 nm. Reproduced from [115] with permission.