1 research outputs found
Layer-by-Layer Assembly of Polysaccharide Films with Self-Healing and Antifogging Properties for Food Packaging Applications
Self-healable,
transparent, and antifogging polysaccharide films
composed of acrylamide-modified chitosan (AMCS) and alginate aldehyde
(ADA) were fabricated via layer-by-layer (LBL) assembly. The Schiff
base linkage formed between amino groups of AMCS and aldehyde groups
of ADA was used to construct the films. Fourier transform infrared
spectroscopy and X-ray photoelectron spectra revealed that the films
were cross-linked through Schiff base bonds. Ultraviolet–visible
spectroscopy and field emission scanning electron microscope characterizations
demonstrated that the films exhibited linear growth during the LBL
process. The films showed a repetitive self-healing property, and
the repeated damage-healing of the films was thickness-dependent.
The films can heal the scratches that penetrated to the underlying
substrates. Besides the excellent self-healing property, the films
showed an antifogging property due to the hydrophilic nature of the
two polysaccharides. The antifogging ability of the film was thickness-dependent.
Also, the films could regain their transmittance and fog-resistant
property after mechanical abrasion due to their self-healing capability.
These self-healable and fog-resistant polymeric films have potential
applications in food packaging