Optical and thermo-mechanical properties of composite films based on fish gelatin/rice flour fabricated by casting technique

Mechanical and barrier properties of maize starch–gelatin composite films: effects of amylose content

“…This result might be due to the effect of the color of the starch itself on the film. The key factors governing the color properties of films depend on the type, nature and concentration of biopolymer incorporated …”

“…Moreover, with increasing amount of the same type of starch, the thickness of the film also increased. Similarly, an increase in thickness was detected in composite films containing fish gelatin and rice flour, attributed to changes in the density of the materials and the structure, allowing for a high concentration of water in the film structure …”

“…). The first‐stage weight loss (Δ w = 5.449%) of the gelatin film, mainly associated with the loss of free and bound water adsorbed in the film, was higher than that of the starch–gelatin films (Δ w = 3.8345, 4.885 and 4.991% for gelatin films with Al, Ns and Ap respectively). The lower first‐stage weight loss and degradation rate of the gelatin–starch films suggested lower water desorption from both film matrices, mostly linked by hydrogen bonds, compared with the gelatin film, as observed by FTIR spectroscopy (Fig.…”

“…However, when the starch amount is beyond a certain value, starch particles tend to aggregate together, resulting in a reduction in the path for water to pass through and an increase in WVP . In the present study, the WVP values of all composite films were lower than those of gelatin–rice flour films reported by Ahmad et al ., attributed to differences in starch origin.…”

Effect of drying method on mechanical, thermal and water absorption properties of enzymatically crosslinked gelatin hydrogels

“…Peng and Chen (2011) commented that the free water in the polymeric solution is frozen causing polymer chains to gather and condense leading to a honeycomb structure after ice sublimation. On the other hand, for the air-drying method, there is more time to water evaporate leading to an equilibrium polymeric chain conformation (Ahmad et al 2015, Zhang et al 2013. Risbud et al (2000) have found pore sizes equal to 39 μm in freeze-dried films of glutaraldehyde crosslinked chitosan/polyvinylpyrrolidone.…”