The present work investigates the potential of microfibrillated cellulose (MFC) coated onto cellulosic substrates as controlled delivery system (CDS) of antibacterial molecules for food-packaging.
Two coating processes and three substrates were compared. MFC was coated onto paper and cardboard substrates, enhancing their air resistance and bending stiffness with a minimum coat weight of 8 g/m². Microscopic analyses at nanoscale underlined the nanoporous MFC network preserved onto the substrate surface even after coating. For the first time, this network was used as CDS of various molecules and proved its efficiency by releasing molecules more progressively and over a longer period. The antibacterial activity was effective against non-pathogenic bacteria, leading to the improvement of the food shelf-life. The application of this new material was broadened up by using simultaneously cyclodextrins and MFC, which also led to very promising results.
This PhD proposing 8 articles in scientific journals, paves the way for new high-added value applications in the field of controlled delivery systems by using MFC-based materials, within active packaging or medical fields.