In this study,6.67% skin gelatin solution of Andrias davidianus and silicon were used as raw materials to prepare functional composite liquid.The results showed that by the addition of different levels of silicon,the L* value and pH value of the composite liquid increased significantly (P<0.05),meanwhile the gel strength decreased significantly (P<0.05).Rheological analysis showed that the storage modulus and loss modulus of Andrias davidianus skin gelatin could be improved by low levels of silicon (10%~30%) compared with control,which showed a better viscoelastic properties but high level silicon could damage the viscoelastic properties of Andrias davidianus skin gelatin.The infrared spectra showed that the amide A and II bands of gelatin in Andrias davidianus skin gradually moved to the low wave number direction,while the I and III bands shifted to the high wavenumber direction which might be caused by the different hydrogen bond interaction between the silicon and the amino acid side chain of gelatin.Moreover,the emulsifying activity index (EAI) and emulsifying stability index (ESI) of Andrias davidianus skin gelatin solution were significantly improved (P<0.05) by incorporated with different levels of water soluble silicon.Therefore,the composite liquid with low dose of silicon into the giant salamander gelatin possessed good physicochemical properties and emulsifying activity,which could be used as a functional surfactant in food emulsion.
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