Development and Characterization of an Edible Composite Film Based on Chitosan and Virgin Coconut Oil with Improved Moisture Sorption Properties

Abstract

An edible composite film was prepared from an emulsion system based on chitosan and virgin coconut oil (VCO). The effect of incorporation of VCO was evaluated at various concentrations and the optimum concentration was chosen based on resultant changes in the properties of the film. Addition of VCO in film forming solution resulted in increase in film thickness and marginal reduction in film transparency. Compatibility of VCO with chitosan was better at lower concentration of VCO as indicated by the microstructure of composite film in scanning electron micrographs. Phase separation was evident at higher level of oil incorporation and the optimal oil/chitosan ratio was determined to be at 0.5 to 1 mL/g chitosan. Furthermore, chemical interaction took place between VCO and chitosan as revealed by Fourier transform infrared spectroscopy data. Even though control chitosan films exhibited superior gas barrier properties, composite film with optimum VCO concentration revealed better mechanical and moisture sorption properties.

Chitosan composite films: physicochemical characterization and their use as coating in papaya Maradol stored at room temperature

“…This highlights the positive effect of films combined with essential oils on film strength. Indeed, several studies report that the oil addition on films reduces the matrix strength when they are combined (Pereda et al, 2012, Binsi et al, 2013, López-Mata et al, 2013. However, in concordance with our findings, it has been reported that the addition of olive oil improves the tensile properties of chitosan films (Pereda et al, 2012).…”

“…To prepare the films, the procedure described by Binsi et al (2013) was followed, with modifications. First, the chitosan (1.5 % w/v) was dissolved in an aqueous acetic acid solution (1 % v/v) using magnetic stirrer at 45 °C for 24 h. The solution was cooled to room temperature; 0.5 % (v/v) of Tween 20 was added and then homogenized by magnetic stirring for 2 h. From this solution, a volume of 20 mL was used to formulate each mixture set (see section on treatments of Table 1).…”

“…Solubility (S) was determined according to a method proposed by Wang et al (2011) and; the water content retained in equilibrium by the method described by Binsi et al (2013), which is reported as water sorption capacity (WSC). For each treatment, five replicates were independently developed and evaluated, considering one film as a replicate.…”

Preparation, Characterization and Evaluation of Antifungal Efficacy of Chitosan/Soy Phosphatidylcholine Topical Films Containing Griseofulvin

“…However, incorporation of Soy PC, which is hydrophobic decreased the availability of hydroxyl and amino groups and caused a reduction in swelling ratio particularly when it was added at higher concentrations (28). At the end of the experiment, NPC/Cs2 showed 36.63% erosion, while PC1Cs2 and PC2Cs2 retained their integrity.…”

Uso combinado de radiación UV-C y biorecubrimiento de quitosán con aceites esenciales para el control de hongos en papaya Maradol

“…Para elaborar las soluciones de los biorecubrimientos se siguió el procedimiento descrito por Binsi et al (2013). Se disolvió quitosán (15 g L -1 ) de bajo peso molecular en una solución acuosa de ácido acético glacial (10 mL L -1 ) mediante agitación magnética a 45 °C durante 24 h. Pasado este tiempo, la solución se dejó enfriar a temperatura ambiente y se adicionaron 5 mL L -1 de Tween 20 ® , luego se mantuvo en agitación por 2 h para su homogenización.…”