Development of sustainable hybrid hydrocolloid films with improved water vapor barrier

Abstract

The aim of this study was to develop sustainable HHF using pectin and rosemary oil-loaded solid lipid nanoparticles (SLN) for improving the moisture barrier. Physical, mechanical, thermal, and morphological properties were determined to characterize developed films. Results: The water vapor permeability of pectin films decreased by over 90% upon SLN incorporation, thus improving the moisture barrier. This can be attributed to the SLN being nanoscale particles with platelet-like shapes that additionally are crystalline and hydrophobic. Together, these features reduce the hydrophilicity of pectin films and lead to the formation of tortuous paths slowing down the diffusion of water molecules through the films. All films with and without SLN were transparent with an immediate complete disintegration in water