Preparation of Chitosan Sustained Release Antibacterial Nanofilm Material and Its Effect on Postharvest Strawberry Quality
In order to maintain the quality of postharvest strawberries during storage and transportation,and to preserve them in fresh quality for a long time and extend their shelf life,chitosan sustained-release antibacterial nanocoates with significant preservation effects were searched,the following research was conducted:preparation and characterization of eugenol chitosan sustained-release microcapsules,modification of chitosan solution to prepare eugenol chitosan nanocontrolled release films,and analysis of the effect of coating materials on the quality of strawberries during storage.The results showed that eugenol loaded chitosan nanoparticles with good sustained release were successfully prepared by the ionic gel method,with an average particle size of 214 nm;When the amount of chitosan nanoparticles added is 15 g/100 mL,the chitosan nanoparticle controlled release film has the highest moisture resistance and mechanical properties,and has a strong inhibitory effect on pathogenic bacteria.It can be used for fruit and vegetable film preservation packaging.The strawberry coating preservation experiment showed that chitosan nanocontrolled release film material can reduce the initial total bacterial count on the surface of strawberries by about 1 log10 CFU/g;And by inhibiting the respiratory intensity and surface microbial growth of strawberries,the weight loss rate and decay rate of strawberries during storage were significantly reduced(P＜0.05),the stability of color,superoxide dismutase(SOD),Vitamin C,and anthocyanins in strawberries were maintained,thereby extending the storage and preservation period of strawberries.
万方数据
维普
