Development of biocomposite films from natural protein sources for food packaging applications: Structural characterization and physicochemical properties

Abstract

Nowadays, the utilization of biodegradable materials extracted from bio resources is gaining immense interest among the investigators mainly because of their natural availability and biodegradable behavior. In the present work, protein and protein rich compounds were used for the preparation of biodegradable films. The presence of protein in many substances was examined and protein content was screened in the samples of sheep milk protein, casein and gelatin. The protein content in sheep milk was relatively high. Each protein sample was tested for the preparation biocomposite film with the addition of certain plasticizer agents and cross linkers. The reagents used here include glycerol and polyethylene glycol as plasticizer, while glutaraldehyde served as cross-linking agent. In alkali condition, glutaraldehyde reacted with the amino groups in the protein and formed excellent intermolecular linkages, which led to the development of biocomposite film. The volume fraction of different plasticizers and cross linkers and pH to be added was optimized. Different characterization techniques such as tensile, Fourier transformation infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and degradation studies were carried to reveal the various sources of protein. The prepared biocomposite films can be used for food packaging application.

Casein‐based conjugates and graft copolymers. Synthesis, properties, and applications

“…The reaction of sodium caseinate with GTA resulted in a cross-linked material (Figure 2) with a significant decrease in solubility, a shrinkage and improved mechanical, thermal, degradation, and barrier properties (Muthulakshmi et al, 2022;Pereda et al, 2010). Depending on the dry or wet method used to prepare cross-linked casein, total soluble matter decreases with the percentage of GTA added, due to the formation of a denser network (Table 2).…”

“…The reaction of sodium caseinate with GTA resulted in a cross‐linked material (Figure 2) with a significant decrease in solubility, a shrinkage and improved mechanical, thermal, degradation, and barrier properties (Muthulakshmi et al., 2022; Pereda et al., 2010).…”

Green Preparation of Mn‐Doped ZnS Quantum Dots/Gelatin Composite Gel Beads and Their Applications in Detection

“…[11] Gelatin, a biopolymer derived from collagen, has a lot of advantages such as nontoxicity, biodegradability, biocompatibility, and affordability. So far, gelatin has been widely used in food packaging, [12] wound healing, [13] and biosensors. [14] It is worth noting that gelatin shows a reversible sol-gel transition in response to thermal stimuli.…”

New Composite Materials with Cross-Linked Structures Based on Grafted Copolymers of Acrylates on Cod Collagen

“…However, grafted MMA copolymers on collagen can only be considered only as precursors of biodegradable materials. The creation of special-purpose materials requires the development of composites by introducing additional components with certain characteristics [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Thus, the research on the creation of composite materials with the inclusion of modifiers is significant and promising.…”

“…PEG is the most well-known and widespread modifier of the protein properties of substrates in medical and pharmaceutical practice [17][18][19][20]. The Society for Nutrition and Medicines of the USA (FDA) allows the use of PEG as a substance in medicine (production of medicines), food, and cosmetology [17]; it is also used as a food additive (E1521) in the EU and the Russian Federation [36].…”