Construction and Properties of Anthocyanin Starch/Chitosan Eutectic Solvent Plasticized Films
This paper aimed to select plasticizers with excellent performances to prepare high-performance starch/chitosan composite films,broadening the application ranges of edible cling films.Using the solution casting method,chitosan and starch were mixed at a specific mass ratio,an appropriate amount of anthocyanin was added as a preservative,and different types of eutectic solvents were incorporated,then the blends were cast into flat surfaces to form films.The hydrogen bond acceptor in the eutectic solvents was betaine,and the hydrogen bond donors were lactic acid,citric acid,and urea.By adjusting the mass fractions of eutectic solvents,composite films with different types and functions were prepared.The films were characterized by using mechanical properties,water vapor permeability,Fourier transform infrared(FTIR)spectroscopy,and thermal stability analysis.Additionally,antioxidant activity,free radical scavenging rate,and antibacterial properties were experimentally analyzed to evaluate the physicochemical characteristics of the composite films.The results show that when citric acid is used as the hydrogen bond donor in the eutectic solvent and its mass fraction is 20％,the tensile strength of the composite film reaches 42.77 MPa,the water vapor permeability coefficient is 1.843x 10-11 g·cm/(cm2·s·Pa),and the free radical scavenging rate is 96％,showing the best overall performances.
万方数据
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