Stretchable film structure and method of making the same

A method of making a stretchable film structure comprising:

• step (S1):
• providing an elastic substrate, and pre-stretching the elastic substrate along a first direction and a second direction intersecting with the first direction, to obtain a pre-stretched elastic substrate;
• step (S2):
• laying a carbon nanotube film structure on a surface of the pre-stretched elastic substrate, and the carbon nanotube film structure comprising a plurality of super-aligned carbon nanotube films stacked with each other, each of the plurality of super-aligned carbon nanotube films comprising a plurality of carbon nanotubes substantially parallel with each other;
• and
• step (S3):
• releasing the pre-stretching of the elastic substrate to restore deformations of the elastic substrate, and forming a plurality of wrinkles on a surface of the carbon nanotube film structure.