Plasticizers for Biopolymer Films - Glass Transition and
Plasticizers are important additives that diminish the brittleness and impart adequate flexibility and processability to polymers. Plasticizers are low molecular weight agents added to polymeric materials such as plastics, biopolymer based films, paints, or adhesives, to produce or promote plasticity, flexibility, processability and to reduce
Natural-based plasticizers and biopolymer films: A review
In biopolymer-based films and coatings production, plasticizers are also essential additives since they can improve flexibility and handling of films, maintain integrity and avoid pores and cracks in the polymeric matrix [20].
Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
The addition of plasticizers to biopolymer films is a good method for improving their physicochemical properties. The aim of this study was to evaluate the effect of chitosan (CHI) blended with two hydrophilic plasticizers glycerol (GLY) and sorbitol (SOR), at two concentrations (20 and 40 wt%) on their mechanical, thermal, barrier, structural, morphological and antimicrobial properties. The
Natural-based plasticizers and biopolymer films: A review
Plasticizers, for biopolymer-based lms, can be divided into water soluble and water insoluble [25]. The type and the amount of plasticizer strongly affect the lm formation from polymeric aqueous dispersions [26]. Hydrophilic plasticizers dissolve in the aqueous medium when they are added to polymer dispersions and if added in high con-
Biopolymer-based edible films and coatings for food
Film-forming biopolymers 3.3.1. Polysaccharides Polysaccharides such as starch and cellulose, and its derivatives, chitosan, pectin, and kefiran, are extensively used in the development of edible films ( Druchta & De Mulder Johnston, 1997 ).
- Do Plasticizers improve tensile strength and homogeneity of wheat starch-based bioplastics?
- Plasticizers were added to improve the flexibility and homogeneity of the wheat starch-based bioplastic. Control film exhibited high tensile strength (38.7 MPa) with low elongation (1.9%). However, films plasticized with 35% sorbitol showed the highest elongation, which was 60.7% at break.
- Why are plasticizers important in biopolymer-based films & coatings production?
- In biopolymer-based films and coatings production, plasticizers are also essential additives since they can improve flexibility and handling of films, maintain integrity and avoid pores and cracks in the polymeric matrix .
- How to select a plasticizer for a biopolymer?
- Selecting a plasticizer for a biopolymer involves considering the reasons for its application, the mechanism of its action, its interaction and effect on other additives, and the concentration range depending on the application.
- Which plasticizers are used for bio-based plastics?
- This review focuses on plasticizers utilized for bio-based plastics. Although a wide variety of bio-based plastics are under development, this review focuses on the most extensively studied bioplastics including poly(lactic acid), polyhydroxyalkanoates, thermoplastic starch, proteinaceous plastics, and cellulose acetates.
- Are biopolymers a good substitute for conventional plasticizers?
- The use of natural and/or biodegradable plasticizers, with low toxicity and good compatibility with several plastics, resins, rubber and elastomers in substitution of conventional plasticizers, such as phthalates and other synthetic conventional plasticizers attracted the market along with the increasing worldwide trend towards use of biopolymers.
- What are biodegradable plasticizers?
- Biodegradable plasticizers such as soybean oil (SO), epoxidized soybean oil (ESO), dibutyl phthalate (DBP) and triethyl citrate (TEC) were added to poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) films, enhancing their thermal and mechanical properties. TEC or DBP presented better plasticizing effects than SO and ESO for PHBV .
