Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Fabrication of electrospun SiO2 nanofibers.
  • fig. S2. Homogenization of nanofibers.
  • fig. S3. Morphology of homogenized nanofibers.
  • fig. S4. The freezing of nanofiber dispersions.
  • fig. S5. Magnified XPS spectrum.
  • fig. S6. The ultralow density of the CNFAs.
  • fig. S7. Compressibility of the CNFAs with a density of 0.15 mg cm−3.
  • fig. S8. SEM images of the nanofibrous cell walls.
  • fig. S9. Micro-orientation and macro-isotropic structure of CNFAs.
  • fig. S10. Mechanical properties of the CNFAs upon different orientation.
  • fig. S11. EDS mapping of junctions between nanofibers.
  • fig. S12. Shear mechanical properties of CNFAs.
  • fig. S13. Tensile mechanical properties of CNFAs.
  • fig. S14. Elastic resilience of CNFAs with different structures.
  • fig. S15. Amorphous character of the CNFAs.
  • fig. S16. Effect of fiber diameter on the structure of CNFAs.
  • fig. S17. Effect of fiber diameter on the mechanical properties of CNFAs.
  • fig. S18. Effect of lamellar spacing on the structure and properties of CNFAs.
  • fig. S19. Elasticity of a PU foam.
  • fig. S20. Elasticity of CNFAs with a wide range of densities.
  • fig. S21. The temperature at the position of the CNFAs upon flames.
  • table S1. The relevant densities and thermal conductivities of CNFAs and other insulation materials.
  • Supplementary Methods
  • Supplementary Discussions

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Other Supplementary Material for this manuscript includes the following:

  • movie S1 (.mp4 format). Compression and recovery processes of CNFAs.
  • movie S2 (.mov format). Fast recovery of CNFAs by rebounding a steel ball.
  • movie S3 (.mp4 format). Compression testing in the flame of an alcohol lamp.
  • movie S4 (.mp4 format). Compression testing in the flame of a butane blowtorch.

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