Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
chitosan or chitosan/plasticizer was prepared by adding 4.2 g of the chitosan powder to 420 mL of a 1 % acetic acid solution, which was then stirred for 12 h. The com-positions of the chitosan/plasticizers blends were 100/0, 80/20 and 60/40 by weight. The lms were cast onto a polypropylene plate and dried at 60 C for 12 h. Characterization
Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
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.
Natural-based plasticizers and biopolymer films: A review
Hydrophilic plasticizers dissolve in the aqueous medium when they are added to polymer dispersions and if added in high concentration they can lead to an increase in water diffusion in the polymer. In contrast, hydrophobic plasticizers may close the micro-voids in the film, leading to a decrease in water uptake.
Chitosan/Hydrophilic Plasticizer-Based Films
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...
Functional properties of chitosan-based films - ScienceDirect
To understand the effect of the plasticizer on film wettability, contact angles were investigated for chitosan films with different contents of glycerol. As it is shown in Fig. 5 water contact angles of pure chitosan films were around 105°, according to the values found in the literature ( De Britto and Assis, 2007 , Hsieh et al., 2005 ).
- Are chitosan films good for food packaging?
- The CS-ME:OA:THY composite films displayed highest antibacterial and antioxidant activities. Chitosan films plasticized with DESs significantly prolonged the shelf life of grape. The limited mechanical and barrier properties of chitosan (CS) have restricted its widespread adoption in food packaging.
- Can chitosan film be incorporated with hydrophobic deep eutectic solvents?
- Abstract To improve the limited mechanical and water barrier properties of chitosan film while granting extra functionalities simultaneously, present study pioneered the incorporation of chitosan film with newly developed essential oil (EO)-based hydrophobic deep eutectic solvents (HDES, EO:octanoic acid (OA), EO:menthol (ME) and OA:ME:EO).
- Do chitosan films have a plasticization effect?
- The prepared films were colorless, transparent, homogeneous and uniform. However, the WVTR values were increased when GLY was added to the chitosan films. Furthermore, the chitosan films plasticized with 20 % GLY exhibited plasticization characteristics, but when the content was increased, the antiplasticization effect was observed.
- Can oleic acid be used as a plasticizer for chitosan films?
- On the other hand, Vlacha et al. (2016) proposed oleic acid as a plasticizer for chitosan films. Samples prepared with this plasticizer were shown to be a better barrier to water vapor. Unfortunately, other properties (including mechanical and hydrophilic) were worse than they were for glycerol.
- Which chitosan film has the best mechanical properties?
- The obtained chitosan had a degree of deacetylation (DA) of 84 ± 2.7 and a molecular weight of 136 kDa, which indicated that a good film had formed. The films composed of CHI and GLY (20 wt%) exhibited the best mechanical properties compared to the neat chitosan film.
- What is a good plasticizer concentration for chitosan films?
- The plasticizer concentration of 20 % GLY is sufficient for obtaining flexible chitosan films with good mechanical properties, and it could serve as an alternative as a packaging material to reduce environmental problems associated with synthetic packaging films.
