Physicochemical and functional properties of dialdehyde polysaccharides crosslinked gliadin film cooperated by citric acid

Functional properties and formation mechanisms of dialdehyde polysaccharides crosslinked gliadin‐films enforced by alkaline condition

“…The amino groups were more capable of nucleophilic attack under alkaline conditions, and thus the degree of crosslinking between amino groups and aldehyde groups was noticeably increased 10 . The gliadin and DPs could be completely dissolved in alkaline solutions, and the Schiff base bonds can be stable under alkaline conditions 6 . Therefore, the film‐forming solutions and the films were all prepared under 0.05 mol L −1 NaOH solution and all the films were prepared by the casting method.…”

“…The thickness of the films was measured with three replicates and the mean thickness was marked with d (in millimeters) 6 . The initial mass of gliadin‐films was recorded as m 0 (in grams).…”

“…The film powder was analyzed by FTIR, and the spectra from 400 cm −1 to 4000 cm −1 were collected in 32 scans at a resolution of 4 cm −1 6 …”

“…Gliadin is a by‐product of the starch industry, which shows satisfying film‐forming properties and gelling properties, and it is an ideal matrix to fabricate protein‐based films 6 . However, the protein‐based films in general show hydrophilic properties and weak water‐resistant properties 7 .…”

Protein fibrillation and hybridization with polysaccharides enhance strength, toughness, and gas selectivity of bioplastic packaging

“…This can be ascribed to the decrease in the ow between molecular chains caused by the rigid crosslinking between chemical bonds induced by citric acid. 34,35 With a further increase in the citric acid content to over 30%, the tensile strength decreases, the elongation at break increases, and the Young's modulus decreases. As the content exceeds 30%, citric acid mainly acts as a plasticizer that penetrates into the polymer chain, resulting in discontinuities in the lm matrix.…”