TEAM 2: BIOPOLYMERS & BIO-SOURCED POLYMERS
Polymers with their myriad functions are indispensable to any modern technology. Today, their production is largely based on fossil fuels. In view of their limited range, other sources are desirable on the long term. In this purpose we develop new polymers based on renewable feedstock (fatty acid, terpenes, carbohydrates…).
Bio-based Polymers from Vegetable Oils
This research topic involves Henri Cramail, Etienne Grau and Stéphane Grelier.
At the LCPO, we focus on using different sustainable resources such as vegetable oil to produce a wide range of polymers. In this purpose, chemical modifications of these renewable feedstock materials are performed to produce monomers (building blocks) in agreement with the green chemistry concept such as atom efficient method, catalysis, CO2 chemistry…
Subsequently we study their polymerizations using various polymerization routes (ADMET, polyaddition, anionic polymerization…) and processes (bulk, miniemulsion, solution) in order to obtain renewable polymers of all kinds (linear, 3D networks, block copolymers, hyperbranched, latexes …). Finally the properties of these polymers are investigated.
A webminar about the economic potentialities of biosourced polymers can also be watched (in French).
Synthesis of Synthons by Controlled Depolymerisation of Lignocellulosic Biomass
This research topic involves Stéphane Grelier, Frédérique Ham-Pichavant, Henri Cramail, Etienne Grau and Véronique Coma.
Knowing that the fossil fuel available on Earth will be exhausted in the foreseeable future, developing new chemicals from renewable sources is nowadays a strategic research area. Within the last two decades, there has been a growing interest in lignocellulosic residues.
Lignocellulosic biomass is a sustainable resource that offers the production of numerous industrial and non-food consumer products such as fuels, chemicals, and polymeric materials. In this context, chemical and enzymatic depolymerisations of cellulose, lignin and xylan are studied to produce monomers for designing new bio-based copolymers.
Functional Materials based on Nanocelluloses and Polysaccharides
Surface Tailoring of Nanocelluloses by Chemical Functionalization
This research topic involves Gilles Sèbe and Frédérique Ham-Pichavant.
In the current context of sustainability, there is a growing interest in developing novel functional materials based on sustainable bioresources. In particular, nanocelluloses are increasingly considered as suitable building blocks for the elaboration of hierarchical materials, thanks to their nanosize dimensions and unique rod-like or fibrillar structure.
Because of their high specific strength, modulus and aspect ratio, nanocelluloses can significantly improve the mechanical performances of polymers, at low loading levels. They can also serve as stabilizing agents in Pickering emulsions, as matrix for the preparation of aerogels or foams, or as templating agent.
But to realize the full potential of these applications, the nanocellulose surface must be tuned by appropriate functions to control their dispersive, interfacial and self-assembling properties.
In this context, this research aims at developing novel nanocelluloses-based functional materials, through chemical tailoring of the nanocellulose surface. We’re particularly interested in developing systems where nanocelluloses are used as reinforcing agents, emulsifiers, biotemplates or responsive nanodevices.
Inter-active and barrier polysaccharide-based materials
This research topic involves Véronique Coma, Frédérique Ham-Pichavant, Cédric Le Coz and Stréphane Grelier.
Polysaccharides are increasingly considered for the elaboration of novel functional materials with tailored properties, thanks to their renewability, biocompatibility and potential bioactivity.
One of the main objectives of this research topic is to tailor the surface of biopolymer-based materials, in particular chitosan- and cellulose-based ones, by chemical and enzymatic functionalization or multi-component engineering approaches, to design innovative functional materials with tunable barrier properties and controlled antimicrobial activity. Potential applications are in the field of intelligent/active materials (food biopackaging, cosmetic and biomedical domains).
Xyloforest EquipEx (ANR-10EQPX-16) is founded by the national Investments for the Future and structured around six technology platforms among which Xylochem, mobilizing a hundred staff members from partner research laboratories.
They offer innovative services destined to the research community and to the forest and wood professionals. Xyloforest’s implementation is spread throughout 2013 and running until 2020. Xylochem’s platform aims to bring together academic research laboratories, institutional and industrial partners around coherent and innovative projects in the field of chemistry and wood biorefinery.
The main objective of the Xylochem’s platform is to develop and operate the lignocellulosic biomass (cellulose, hemicellulose, lignin) as a source of raw materials for the chemical industry. LCPO host a technical hall equipped with reactors for biomass deconstruction and fragmentation of biomass.