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| Optimization of preparation process and properties of egg yolk lipids powdered oil |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240127 |
| KeyWord:egg yolk lipids powdered oil physicochemical index storage stability oxidative stability |
| FundProject: |
| Author Name | Affiliation | | CAI Yundan1,2，RAO Shengqi3，GU Luping1,2，CHANG Cuihua1,2，
LI Junhua1,2, YANG Yanjun1,2, SU Yujie1,2 | 1.State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi 214122, Jiangsu, China
2.School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
3.School of Food Science and Engineering, Yangzhou University,
Yangzhou 225127, Jiangsu, China |
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| Download times: 720 |
| Abstract: |
| In order to solve the problem of easy oxidation of egg yolk lipids, egg yolk lipids powdered oil was prepared by microencapsulation technology, the effects of parameters such as wall material type, wall-core mass ratio, sucrose fatty acid esters dosage, homogenization pressure and homogenization times on the emulsion stability and embedding rate of egg yolk lipids powdered oil were investigated by single factor experiments to determine the optimal preparation process of the powdered oil, and the effects of different ways of egg yolk lipids preparation (ethanol extraction, supercritical CO2 extraction, supercritical CO2 extraction-cholesterol removal) on the physicochemical indexes of the powdered oil were explored. The results showed that egg yolk lipids extracted by supercritical CO2 extraction were used as the core material, and maltodextrin, modified corn starch and whey protein were used as the wall material, the optimal preparation process of egg yolk lipids powdered oil was determined as follows: mass ratio of maltodextrin to modified corn starch 5∶ 1, whey protein dosage (in terms of wall material amount) 5%, wall-core mass ratio 4∶ 1, sucrose fatty acid esters dosage (in terms of wall material amount) 3%, homogenization pressure 40 MPa, and homogenization times 3. Under these conditions, the stability of the emulsion reached 85.88%, and the embedding rate of the powdered oil reached 93.70%. Three kinds of egg yolk lipids powdered oil were prepared under the optimal preparation conditions, in which the powdered oil of egg yolk lipids extracted by supercritical CO2 extraction had lower moisture content, good fluidity, intact spherical structure of the particles, high content of polyunsaturated fatty acids and higher storage stability than that of the ethanol extraction method. In conclusion, the powdered oil of egg yolk lipids obtained by supercritical CO2 extraction has a high embedding rate and good stability, which is more suitable as the lipid feedstock of powdered oil. |
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