부산대학교 도서관

The coatings of cellulose nanocrystals (CNCs) on different common plastic films have proven to be an excellent barrier to oxygen permeation, able to make feasible a significant reduction in the final thickness of flexible packaging materials, adding a very thin layer of a bio-based material. The main hurdles to a possible application of such a new technology, however, is still represented by the low water vapor resistance and the lack of thermoplastic properties. In this work, a thin PET film (23 ìm), has been coated by a CNCs suspension (8% in water w/v) obtaining a final coating thickness of less than 700 nm. The coated PET films have been laminated, by water and solvent based polyurethanes adhesives to both CPP and LDPE films. The laminated structures obtained were subsequently tested for their resistance to delamination, sealable properties, and oxygen permeability, following ASTM standards procedures. The results obtained demonstrated the feasibility of such novel multilayer structures in high demanding food packaging. [ABSTRACT FROM AUTHOR]