Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
Plasticized chitosan lms were prepared according to the method mentioned by Suyatma et al. [5] with some mod-ications. A solution with a concentration of 1 % neat 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
Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
The chitosan was prepared through the alkaline deacetylation of chitin obtained from fermented lactic from shrimp heads. 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.
Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
The chitosan was prepared through the alkaline deacetylation of chitin obtained from fermented lactic from shrimp heads. The obtained chitosan had a degree of deacetylation (DA) of 84 ± 2.7...
Journal of Polymers and the Environment | Volume 22, issue 1 - Springer
Chitosan/Hydrophilic Plasticizer-Based Films: Preparation, Physicochemical and Antimicrobial Properties Jesús R. Rodríguez-Núez Tomás J. Madera-Santana Herlinda Soto Valdez Original Paper Published: 08 November 2013 Pages: 41 - 51 Thermal Degradation and Kinetic Parameters of Polyester and Poly (Lactic Acid) Blends Used in Shopping Bags in Brazil
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
- What plasticizers are used to make chitosan film?
- Up to date, the commonly used plasticizers are glycerol, sorbitol, polyethylene glycol, and propylene glycol (Suyatma et al., 2005). Although the mechanical properties of chitosan film were modified, the innate antibacterial activity of chitosan was reduced by adding these plasticizers (Yu et al., 2023).
- Do plasticizers reduce hydrophilic character of chitosan?
- The results for GLY and SOR after 10 months are similar to APs. The contact angle values for all films is <90°, indicating the hydrophilic nature of the surfaces. Nevertheless, plasticizers used in this study caused reduction of hydrophilic character of chitosan.
- 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.
- 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.
- 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.
- Why is chitosan a hydrophilic film?
- This result is associated with the hydrophilic character of SOR because it is less hydrophilic than GLY. With regard to the percentage of solubility in water (% SW), the neat chitosan films had high solubility (easy dissolution), and thus the solubility was not detected; however, when GLY was added to the films, the % SW was measured.
