Effect of polyvinyl alcohol and carboxymethylcellulose on the technological properties of fish gelatin films

Abstract

The objective of this work was to develop biodegradable films by mixing gelatin/carboxymethylcellulose (FG/CMC) and gelatin/polyvinyl alcohol (FG/PVOH) and to evaluate the effect of adding these polymers on the properties of fish gelatin films. The films FG/CMC and FG/PVOH were produced in the proportions 90/10, 80/20 and 70/30 and characterized their physical, chemical and functional properties. The addition of CMC and PVOH improved the mechanical strength, barrier property and water solubility of gelatin films. FG/CMC films showed greater tensile strength and greater solubility than FG/PVOH. The maximum concentration of CMC promoted the highest mechanical resistance, while the highest PVOH content produced the film with the lowest solubility. The proposed mixing systems proved to be adequate to improve the properties of fish gelatin films, with potential for application in the packaging sector.

Production and Characterization of Bio‐based Sponges Reinforced with Hypericum perforatum oil (St. John′s Wort Oil) via Pickering Emulsions for Wound Healing Applications

“…Neat PVA/CMC films revealed 5‐step weight loss. In the first step, a weight loss of 9.4–14.4 % at 30–120 °C due to the moisture from the samples [40] . The second step (125–255 °C) degradation is associated with polymer dehydration caused by side chain breakage and production of a polyacetylene‐like structure [31, 41] .…”

“…In the first step, a weight loss of 9.4-14.4 % at 30-120 °C due to the moisture from the samples. [40] The second step (125-255 °C) degradation is associated with polymer dehydration caused by side chain breakage and production of a polyacetylene-like structure. [31,41] With the chain scission of PVA and polysaccharide degradation owing to cellulosic structures (CÀ O and CÀ C bonds in the ring units) and so release of CO 2 gas and formation of the oxides are observed at the temperature of 255-500 °C.…”

Influence of Dielectric Barrier Discharge Cold Plasma Treatment on Starch, Gelatin, and Bacterial Cellulose Biodegradable Polymeric Films

“…Enzymatic treatment of gelatin films with transglutaminase [ 48 ] showed a slightly superior effect in decreasing the film solubility (25%) compared to the plasma treatment (18%). The addition of polyvinyl alcohol was reported as a good alternative to reduce the gelatin film solubility [ 47 ].…”

“…Plasma treatment showed a superior effect in increasing the tensile strength of gelatin films compared to the addition of natural extracts, such as extracts from B. gymnorhiza and S. alba [ 53 ]. However, the effect was lower than that attained by producing a gelatin and polyvinyl alcohol composite [ 47 ]. Regarding the elongation at break, plasma treatment reduced this property, making a more rigid film.…”

“…Regarding the elongation at break, plasma treatment reduced this property, making a more rigid film. On the other hand, the addition of natural compounds [ 53 ], enzymatic treatment [ 48 ], and the composition of polyvinyl alcohol [ 47 ] increased the flexibility of gelatin films.…”