Biomimetic Foams of High Mechanical Performance Based on Nanostructured Cell Walls Reinforced by Native Cellulose Nanofibrils

Authors

  • Anna J. Svagan,

    1. Department of Fibre and Polymer Technology, Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm (Sweden)
    Search for more papers by this author
  • My A. S. Azizi Samir,

    1. Department of Fibre and Polymer Technology, Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm (Sweden)
    Search for more papers by this author
  • Lars A. Berglund

    Corresponding author
    1. Department of Fibre and Polymer Technology, Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm (Sweden)
    • Department of Fibre and Polymer Technology, Royal Institute of Technology, Teknikringen 56-58, 100 44 Stockholm (Sweden).
    Search for more papers by this author

  • The work was financed by the EU 6th framework IP “Sustainpack” project, and the Vinnova–Tekes Green materials programme (A.J.S.). In addition, the Biofibre Materials Centre and BioMime at KTH provided funding (M.A.S.A.S., L.A.B.).

Abstract

original image

A bioinspired foam in which cellulose nanofibrils are used to reinforce cell walls (ca. 3 µm) is presented. The nanocomposite foams are prepared by a lyophilization technique and show composite structure at the cell-wall scale. The nanocellulosic network shows remarkable mechanical performance, expressed in much-improved modulus and yield strength compared with the neat starch foam.

Ancillary