Mécanique des matériaux biosourcés. De l'extraction au recyclage, conséquences sur les propriétés effectives.

Since their first isolation in 1940s by Randy, nanocrystalline cellulose start attracting the attention of the material community. Later during 1980s, Turbark group's succeeded in extracting microfibrillated cellulose, stimulating further the interest toward these renewable building blocks. Nowadays with the emergence of the green portfolio, numerous efforts are being focused on the use of materials from renewable resources, and we are attesting a huge and unprecedented interest for nanocellulose. This interest is due to their renewability and biodegradability, in addition to their appealing intrinsic properties such as low density, outstanding mechanical properties. Moreover, nanocelluloses possess spectacular optical properties originating from their ability to self-organize into liquid crystalline arrangements. All these impressive properties allow their use in wide range of applications. This seminar will provide an overview on nanocellulose, their processing using various techniques, followed by few examples related to their chemical modification to access useful nanomaterials for different applications.