Effect of polysaccharide addition on physicochemical properties of zein-dextran grafts
The application of zein was limited due to its poor water solubility.In order to solve this problem,the glycosylation of zein was modified to improve its functional properties and expand its application range by adding polysaccharide.The glycosylation of zein was carried out using dextran(DX)by Maillard method,and the effects of different DX supplemental levels(protein,polysaccharide mass ratio 4:1,2:1,1:1 and 1:2,respectively)on zein modification were studied.The structure and properties of Maillard grafts were characterized by grafting rate,FTIR,solubility and emulsification.After glycosylation,solubility,dispersion,emulsification properties of zein were great-ly improved,and the improvement effect was positively correlated with the added amount of DX.The addition of hydrophilic polysaccharide can significantly improve the solubility and emulsification of zein,which is an effective method to improve the physicochemical properties of zein.
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