Keywords
Orifice Method, Rice Antioxidant Peptide, Microcapsules, Entrapment Rate
Abstract
In order to improve the stability of rice antioxidant peptides, sodium alginate was used as the wall material and the orifice method was used to microencapsulate the rice antioxidant peptides. Taking the embedding rate as the inspection index, based on the single factor experiment, the response surface analysis method was further used to analyze the mass ratio of the core material to the wall material, the mass fraction of sodium alginate, the embedding temperature, the mass fraction of CaCl2, and the mass fraction of sucrose fatty acid esters. The process conditions were analyzed and optimized, and the prepared microcapsules were subjected to storage experiments and electron microscope scanning. The results of the response surface optimization test show that the optimal process conditions for preparing rice antioxidant peptide microcapsules are the mass ratio of core material to wall material 0.3:1, sodium alginate mass fraction 1.4%, embedding temperature 50¡ãC, and CaCl2 mass fraction 1.8% , the mass fraction of sucrose fatty acid ester is 0.26%. It has been verified that the embedding rate of microcapsules prepared under the above optimal conditions is 81.24%. Compared with the model prediction value of 81.75%, the relative error is only 0.6%. The storage experiment results showed that the stability of the antioxidant peptides in the microcapsules was significantly improved; the scanning electron microscope results showed that the surface morphology and structure of the microcapsules were intact. Experimental results show that microencapsulation is a better method to protect the activity of antioxidant peptides, and can provide a reference for the actual production of rice antioxidant peptide microcapsules.
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Original research done by Zhang Yu, Lin Qinlu, Tan Yicheng, Chen Li
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