A Study on the Coating Strawberry Conservation Effect of Chitosan Radiolysis Products

Chitosan has antimicrobial activity and film reforming properties.Using a series of different molecular weight of degraded chitosan which products by radiolysis for strawberry preservation,studied the effect on refreshment strawberry by using Viscosity-average Molecular Weight of chitosan in the solution coating,concentration,pH,acid solvent,gelatin contentions on strawberry preservation;And designs the orthogonal test of four factors at three different levels.Test results show that when the recipe 1%viscosity average molecular weight of 7.0×10~4Da,the pH is 5,add 0.5%of gelatin has the best preservation effect.Chitosan coating can increase the storage life of 2 d at room temperature(20℃, HR80%～90%),and can extend the storage life of 3 d at low temperatures(3℃～4℃,HR80%～90%).