Evaluation of Mechanical Properties and Water Vapor Permeability in Chitosan Biofilms Using Sorbitol and Glycerol

Abstract

Chitosan biofilms were prepared with and without plasticizer (glycerol and sorbitol). The physical and mechanical properties of chitosan biofilms with and without plasticizer were evaluated. Chitosan was obtained from shrimp wastes and characterized. The film forming solution (FFS) was obtained through chitosan dissolution and drying. The solution had its pH adjusted to 6.0 and oven dried (40 8C, 24 h) with forced air circulation. Chitosan biofilms without plasticizer showed a tensile strength about 36% higher than biofilms produced with plasticizer. On the other hand, biofilms with plasticizer presented superior values of elongation. The permeability of the water vapor and color presented significant difference (p < 0.05) between all biofilms. Chitosan/plasticizer biofilms showed higher values of water vapor permeability in relation to chitosan biofilms without plasticizer.

Development of Greener Multi-Responsive Chitosan Biomaterials Doped with Biocompatible Ammonium Ionic Liquids

“…The presence of ILs also induces a decrease in the maximum degradation temperature of non-neutralized CS films ( T p in Table ), which indicates that ILs affect the intrinsic reticulation of the polymer structure (due to the number of hydrogen bonding and to electrostatic interactions) and may disrupt its structure. − This effect seems to be more pronounced for [Ch][DHP]-loaded films and for non-neutralized films (Table ), which is in good agreement with the previously discussed data.…”

Progress on the preparation method, physicochemical properties, and application of chitosan-based film

“…The combination with plasticizer like glycerin is the most common method to improve the mechanical property of chitosan-based films [6]. Glycerin and sorbitol are two commonly used plasticizers [7]. Adding specific polysaccharide to chitosan-based film can also increase the mechanical property due to molecular interaction between different polysaccharides.…”