Chemical modification of biobased polymers

Investigators

Brigitte Rousseau, Fanny Coumes, Jutta Rieger, Lydia Sosa-Vargas, Patrice Castignolles, Nicolas Sydlowski (Université de Lille, Itinérance CNRS)

Chemical modification of biopolymers is the historical method of production of polymers materials. Lignins can be valorized as macromonomers for example to incorporate them in polyesters. Physico-chemical properties of polyesters can be adjusted through chemical modification such as etherification, esterification etc. These properties can also be adjusted through grafting of the polyesters to other polymers improving compatibility with other polymers and processability. The high heterogeneity of these polymers in terms of structure, chemical composition, functional groups and molar mass require in-depth  characterization. Characterization in solution rely on established advanced characterization methods (NMR spectroscopy, SEC) as well as new and robust methods (capillary electrophoresis). Chemical modification is typically performed assuming the polymer is dissolved and the functional groups in the polymer are all accessible. Molecular solubility of biopolymers such as hemicelluloses or hyaluronic acid are measured for the first time often leading to surprising results. The chemical composition of hemicelluloses extracted from saw dust is studied in collaboration with Technological University of Compiegne (UTC) and the school of mineral and organic chemistry ESCOM.

Financement

  • ANR 3D BIOBASED 2024
  • Initiative Maitrise des Systèmes Technologiques sûrs et durables de l’Alliance Sorbonne Université (2 bourses de doctorat) et “China scolarship council” (CSC)

Publications