Preparation and Characterization of Florida Mandarin Oil-chitosan Composite Films
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Abstract:
Chitosan (CS) films and Florida mandarin oil (FMO) -chitosan composite films were prepared by casting-evaporation-alkali leaching method. Microstructures of films were characterized by FTIR, XRD, and the influences of FMO content on thickness, tensile strength, elongation at break, water contact angle, water vapour permeability, and total soluble matter content of films were determined. The results indicated that the locations of some functional groups of CS matrix were occupied by FMO ingredients, which affected vibration intensity of covalent bond of CS. Increase of chitosan acetate content and decrease of film tensile strength were caused by incorporation of FMO. When FMO content was 4%, film thickness reached the minimum (19.80±0.21 μm) and elongation at break reached the maximum (2.81±0.01%). When FMO content increased to 10%, the film thickness attained the largest (26.90±0.22 μm). When adding 2% FMO, the lowest water vapour permeability was obtained, which was 305.33±3.69 mg?mm/(kPa?h?m).Water contact angle and total soluble matter content of films increased with increasing FMO content, and the maximums were 81.80±0.09 and 2.96±0.05%, respectively. The research results could provide theoretical basis for the application of FMO-CS composite films.
