Lignocellulosic biomass will be tomorrow's main source of material. It consists primarily in hemicellulose, cellulose and lignin.
The polysaccharide part of the lignocellulosic biomass is of great interest because it allows access to sugar oligomers from cellulose or hemicellulose. The key first step to these projects aims to create by controlled depolymerization, chemical or enzymatic, a library of oligomer synthons of various structure, molecular mass and well defined. The second step aims to re-build new copolymers from synthons, therefore generating a new family of completely biosourced or hybridized materials.
Elise Billès Thesis (2012-2015), the objective is to obtain hybrid materials from cellulose. For this purpose, the cellulose is enzymatically depolymerized to recover size-controlled oligomers. They...more...
- Nanocelluloses : Nawhicel-2 project (Thesis of Benjamin Dhuiege 2014-2017)
Development of new composite materials (thermoplatics, elastomers, glues, adhesives, charged wires...) from various matrix polymers and form nanocelluloses (nanocrystals and/or cellulose nanofibrils). The nanocelluloses being difficult to disperse in low polarity environments (like most polymer matrices), their chemical functionality will first be considered in an aqueous medium to make them more compatible. The functionalized nanocelluloses are then used to prepare model composites whose functionalization impact on the interfacial properties will be studies. The second task of this project is to study the recovery of nanocelluloses on an industrial scale (either by coagulation or flocculation/filtration).