Enhancement of paperboard performance as packaging material by layering with plasticized polyhydroxybutyrate/nanocellulose coatings

SEOANE, IRENE TERESITA; F. LUZI; DEBORA PUGLIA; CYRAS, VIVIANA P.; LILIANA B. MANFREDI

JOURNAL OF APPLIED POLYMER SCIENCE

JOHN WILEY & SONS INC

Año: 2018

0021-8995

Paper presents low water vapor barrier capacity that is considered a limitation for its use in packaging applications.Therefore, the effect of using polyhydroxybutyrate (PHB)-based coatings containing a plasticizer [Tributyrin (TB)] and cellulose nanocrystals(CNCs) in a bilayer configuration with paperboard is investigated in this work. PHB/paperboard composites are obtained bycompression molding. It is found that the addition of TB and CNC in the coating formulation favored both the interaction betweenlayers in the final composite and the enhancement of tensile properties for PHB/paperboard composites. Also, it is proved that watervapor permeation of bilayer composites is reduced by the addition of CNC in the PHB-based layer. Disintegration test of the films hasalso been carried out under composting conditions, according to the standard ISO 20200, demonstrating that all the studied samplesreached more than 90% of disintegration after 49 days of incubation