Man-made and bioinspired materials from nanocellulose : challenges and opportunities
Laurent HEUX. CERMAV-CNRS, Structure and Properties of Glycomaterials, CNRS and Grenoble Alpes
University, France, [email protected]
Natural structures exhibit spectacular properties like, for instance, the iridescence of beetle
shells, and can therefore be a source of inspiration to design innovative materials. In several
situations, those structures are obtained by smart assemblies of crystalline polysaccharides
in association with other polymers. In vivo, those systems are designed to ensure support
and protection of a great number of organisms like in plant cells and exoskeletons of insects
or crustaceans, and are probably the most widespread architectures in the living world.
In CERMAV, we designed several routes aimed at playing with the physical chemistry of
these somehow outsanding nanoparticles, that also bear a permanent dipole moment [1]. For
example, cellulose can be modified by wet chemistry to give all cellulose composites [2] or
prepared as cellulose aerogel that can be further hydrophobized [3] or covered with
inorganic particles [4](Figure 1b). Those aerogels can be directly used after chemical
modification for elastomer reinforcement [5]. In colloidal suspension, CNCs can be physically
covered by surfactants to give stable suspensions in organic solvents that exhibit nice selforganizing properties in organic solvents (Figure 2b)….that can be readily aligned with
electric or magnetic fields [7] . Last but not least, nanocelluloses can be utilized as renewable
building blocks for the design of biomimetic materials that will be discussed in the frame of
this seminar.
Figure 1a
Figure 1b
Figure 2a
Figure 2b
200 nm
20 µm
Références :
[1] B. Frka-Petesic, B. Jean and L. Heux EPL 107 28006 (2014)
[2] A. Codou , N. Guigo, L. Heux , N. Sbirrazzuoli- Composites Science and Technology 117 (2015)
[3 ] Henry, Aurelien; Plumejeau, Sandrine; Heux, Laurent; et al.Acs Applied Materials & Interfaces 7 ,
14584-14592
[4] Fumagalli, Matthieu; Boisseau, Sonia; Heux, Laurent Soft Matter 9, 11309-11317, (2013)
[5] B. de Gaudemaris, J. Berriot, A. Veyland, N. Seeboth, L. Heux, S. Boisseau & M. Fumagalli Rubber
composition comprising cellulose , WO2014:096188 (A1)
[6] S. Elazzouzi-Hafraoui, J.-L. Putaux and L. Heux J. Phys. Chem. B, 113, 11069-11075 (2009)
[7] B Frka-Petesic, H Radavidson, B Jean, L Heux (DOI: 10.1002/adma.201606208) Adv Mater (2017)