Abstract
The contribution of glycyrrhizin (Gy) on the interfacial dynamic adsorption behaviour of the adsorbed layer formed by the bovine alpha-Lactalbumin (α-La) at the oil-water interface were investigated using the interfacial viscoelasticity and quartz crystal microbalance with dissipation (QCM-D) techniques. Compared to the individual α-La, Gy could decrease the interfacial tension, effectively enhancing their adsorption processing. The adsorption kinetic results revealed the diffusion rate of the α-La reduced at 0.5–2.0 mM Gy and its rate constant of rearrangement increased except for 2.0 mM. Also, Gy reduced the viscoelastic modulus including the elastic and viscous modulus of the adsorbed film formed by the α-La. Additionally, more adsorbed mass on the oil-water interface was observed in the α-La/Gy complex according to the QCM-D results, which can improve the stability at the oil-water interface. These results are expected to provide basic interfacial adsorption information for the film formed by multi-component.
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