乳清蛋白-鼠李糖脂混合生物乳化剂的性能研究

doi:10.3969/j.issn.1001-1803.2019.12.003

Abstract

Abstract:

The mixed systems of whey protein and rhamnolipid at different ratios were prepared, and their emulsifying properties（0 ^# diesel as a substrate hydrocarbon）were studied. The results showed that, at the same mass concentration, the mixture showed better emulsifying activity than pure whey protein or rhamnolipid, indicative of good emulsification synergism. The increase of rhamnolipid component therein can also effectively reduce the mean particle size of the emulsion. The emulsifying activity of the mixture under different conditions was studied, which showed that the mixture has significantly improved emulsifying activity under neutral and alkaline conditions; the mixtures of whey protein and rhamnolipid with mass ratio of 2∶1 and 1∶1 also show significantly improved emulsifying activity at 1.5% and 2.5% NaCl contents; Moreover, the mixture is effective in the emulsification of three different substrate hydrocarbons. The Zeta potential and interfacial properties are investigated. It was found that the negative Zeta potential of the mixed micelle particles is weakened compared with the individual components, and the addition of a small amount of rhamnolipid significantly increases the interfacial activity and wettability of the mixture.

Key words: mixed system, emulsifying activity, interfacial property, whey protein, rhamnolipid

CLC Number:

TQ423

ZHANG Guo-rui,SONG Yong-ting,BAO Mu-tai,WANG Wei-dong,LI Xi-ming. Study of the performance of mixed whey protein-rhamnolipid bioemulsifier[J].China Surfactant Detergent & Cosmetics, 2019, 49(12): 783-789.

Figures/Tables 7

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References 20

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测试溶液	Zeta电位/mV
乳清蛋白	-30.07±0.74
4∶1混合物	-27.63±0.50
2∶1混合物	-22.83±0.23
1∶1混合物	-17.60±0.20
1∶2混合物	-23.37±0.47
1∶4混合物	-29.03±0.83
鼠李糖脂	-47.67±3.10

Study of the performance of mixed whey protein-rhamnolipid bioemulsifier

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