Figure 5.

Digital photographs of a gel prepared from cellulose nanofibrils cross-linked with 1,800 g/mol PEI. (A) Before compression, (B) during compression, and (C) after pressure have been released. (D) The gel regains its original shape.

Syverud et al. Nanoscale Research Letters 2011 6:626   doi:10.1186/1556-276X-6-626
Download authors' original image