Chitosan/Hydrophilic Plasticizer-Based Films: Preparation
Abstract The addition of plasticizers to biopolymer lms 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,
Effects of Hydrophilic Plasticizers on Mechanical, Thermal
Our objective was to investigate the effect of plasticizers on mechanical and surface properties of chitosan films. The stability of plasticized films was observed by storage for 3 and 20 weeks in an environmental chamber at 50 ± 5% RH and 23 ± 2 °C.
Effects of Hydrophilic Plasticizers on Mechanical, Thermal
A small amount of RCE (1 wt%) acted as a plasticizer, weakened the intramolecular and intermolecular interaction between CS and CH, increased the distance between them, reduced the crystallinity...
Effects of hydrophilic plasticizers on mechanical, thermal
Although at the beginning the mechanical properties of films made with PG, at high plasticizer concentration, are comparable to those of films made with EG, GLY, and PEG, their stability is poor and they tend to become brittle materials.
Effects of plasticizer type and concentration on the
Similar changes in mechanical properties as affected by hydrophilic plasticizers were previously observed for various hydrocolloid-based films [2, 10, 13, 21, 22]. Myofibrillar proteins are known to be relatively rich in nonionized polar amino acids which are responsible for the formation of extensive protein–protein hydrogen bonding and, as
- Does plasticization increase film hydrophilicity?
- The surface properties, analyzed by contact angle measurement, reveal that plasticization increases film hydrophilicity. It is found that GLY and PEG are more suitable as chitosan plasticizers than EG and PG by taking into account their plasticization efficiency and storage stability.
- Are glycerol and sorbitol a hydrophilic plasticizer?
- The aim of the present study was to evaluate the effect of two hydrophilic plasticizers, specifically glycerol (GLY) and sorbitol (SOR), on the mechanical, optical, thermal, structural, morphological and antimicrobial properties of chitosan films, where the chitosan was prepared from chitin obtained from lactic fermentation.
- Do hydrophilic plasticizers reduce water vapor permeability?
- Such behavior is similar to that described for films prepared with hydrophilic plasticizers. Regarding water vapor permeability, it was determined that the use of hydrophobic plasticizers caused a slight reduction as observed for gelatin films prepared with glycerol and sorbitol.
- Do polyols affect mechanical and surface properties of chitosan films?
- The effect of polyols such as GLY, EG, PEG and PG on mechanical and surface properties of chitosan films was evaluated considering the plasticizer volatility , since it may influence film properties and stability during application and storage, i.e. the less volatile the plasticizer, the better it is for use.
- Can hydrophobic plasticizers emulsify gelatin-based films?
- The aim of this study was the production and characterization of gelatin-based films using hydrophobic plasticizers derived from citric acid and soy lecithin as emulsifier.
- Do plasticizer concentration and hydrophilic nature affect moisture affinity of cassava starch films?
- Plasticizer concentration and hydrophilic nature were found to be important factors in determining the moisture affinity of cassava starch films . GLY-containing films adsorbed more water and at a higher rate during their storage, compared to sorbitol films.
