Extrusion Processing and Properties of Protein‐Based
The smaller molecular mass plasticizers, glycerol, propylene glycol, ethylene glycol, diethylene glycol, and TEG, produced good homogeneous melts with the sunflower protein. 60 Glycerol and TEG were the only plasticizers that did not migrate out of the sunflower plastics over three-month aging. 60 In contrast with studies on other proteins
Protein-Based Films: Advances in the Development
Water is the most effective plasticizer for biopolymeric materials; however, the effect of other common plasticizers has been studied, such as glycerol, sorbitol and xylitol [ 84, 93, 148 ], glycols [ 95, 96 ], sugars [ 84 ], triethanolamine [ 13 ], and gelatin hydrolysate [ 104] in protein-based films, has been studied.
Natural-based plasticizers and biopolymer films: A review
Natural plasticizers used in biodegradable films from biomass products (polysaccharide-, protein-, and lipid-based films) or other films obtained by extraction of micro-organisms. Refs. Soybean oil (SO), epoxidized soybean oil (ESO), dibutyl phthalate (DBP) and triethyl citrate (TEC) 6.1.
Plasticizers for Protein‐Based Materials
There are numerous reports on plasticized protein‐based films, including matrices from plants such as soy, pea, sunflower, and wheat proteins and zein [5]. Animal‐based protein matrices include sodium caseinate, keratin, gelatin, collagen, and whey and myofibrillar proteins.
The effect of plasticizers on the functional properties
The most common materials used for food packaging are plastic, paper, glass, aluminium, fibreboard and steel. Petroleum-based plastics are commonly used as they offer various advantages over other packaging materials in terms of low weight, stability and sturdiness.
- Are glycerols a good plasticizer for protein based materials?
- Glycerols are often cited as good plasticizers for protein-based materials due to their ability to reduce intermolecular hydrogen bonding while increasing intermolecular spacing. As a small hydrophilic molecule which could be inserted between protein chains, it acts as a plasticizer.
- Are polyols a good plasticizer?
- Polyols are good plasticizers for protein-based materials such as gelatin films. Beneficial compounds of plasticized gelatin film can be used as biodegradable food packaging. Glycerol and sorbitol were found to show considerable plasticizing effect on gelatin-based film.
- Why are plasticizers used in biopolymers?
- Plasticizers are molecules of low volatility which are added to biopolymer materials to allow the modification of the functional properties of films by increasing their extensibility, dispensability, flexibility, elasticity, rigidity and mechanical properties (Hanani et al., 2014a, Hanani et al., 2014b).
- What are natural based plasticizers?
- Nowadays, there is increasing interest in the use of natural-based plasticizers that are characterized by low toxicity and low migration. This group includes epoxidized triglyceride vegetable oils from soybean oil, linseed oil, castor-oil, sunflower oil, and fatty acid esters (FAEs) .
- Which plasticizer is best for gelatin films?
- In terms of functional properties, GLY presented higher plasticizing effect and efficiency. Other plasticizers such as sucrose, oleic acid, citric acid, tartaric acid, malic acid, PEG, sorbitol, mannitol, EG, DEG, TEG, EA, diethanolamine (DEA) and TEA were also applied for gelatin films, modifying their mechanical and barrier properties.
- What is a protein based polymer?
- The protein-based polymers have shown unique physical and chemical features for the formation of film/coatings. Additionally, these biopolymeric materials can be functionalized with various additives and fillers such as plasticizers, metal/metal oxide nanoparticles, antioxidants, and antibacterial molecules.
