The raw materials (from renewable sources) were functionalized as follows: chitosan was grafted with furyl groups and castor oil with maleimide groups.
The structure of the resulting compounds was elucidated using FTIR and 1H-NMR spectroscopies.
Crosslinking of chitosan proceeded through the Diels-Alder reaction of the furyl groups grafted onto its backbone and the maleimidic ones from the functionalized castor oil structure.
All the result indicators foreseen in the "project implementation plan" were achieved: 1 participation in scientific events (1 oral presentation), creation of the project website.
STAGE II/2023 SUMMARY:
A model compound was obtained; its structure and the ones of reaction intermediates were confirmed using ATR-FTIR and 1H-NMR spectroscopies.
The crosslinking of chitosan grafted with furyl units proceeded through its DA reaction with maleimide functionalized castor oil; the structure of biofilms was highlighted using ATR-FTIR spectroscopy.
Thermogravimetric analysis showed an improvement in the thermal stability of chitosan by grafting, a stability that increases even more by cross-linking.
DSC analysis demonstrated the thermoreversibility of polymer films characterized by the appearance of the endothermic peak on the heating curve.
Optimal conditions were found to highlight thermal regeneration over several heating cycles in the case of model compound.
All the result indicators foreseen in the "project implementation plan" were achieved: 1 paper sent to be published in a journal Q1 or Q2; 3 participations in scientific events.
STAGE III/2024 SUMMARY:
The AFM study used to evaluate thermal regeneration, also demonstrated a recovery, from morphological point of view, after heat treatment of the lithographed film.
All the indicators proposed in the project implementation plan were achieved: 1 article sent for publication
