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Modulation of the surface properties of protein particles by a surfactant for stabilizing foams

机译：用表面活性剂调节蛋白质颗粒的表面性质稳定泡沫

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In this study, a detailed investigation into the behavior of foams stabilized by mixtures of zein/TA colloidal particles (ZTP) with a conventional anion surfactant (sodium dodecyl sulfate, SDS) has been made. Foams stabilized by either particles or surfactants alone break down completely within one day at all concentrations tested in the present study. However, ZTP can be induced to form fractal clusters in the presence of a surfactant. In mixed particle–surfactant systems, a synergism occurs with respect to foam properties, since the fractal clusters can be used as building blocks with reaction activity to form stable foams with an orderly interfacial architecture. The formability of ZTP–SDS mixtures increases with the increase of SDS concentration. However, the foam stability increases to a maximum at 0.6 mM SDS followed by a decrease at higher SDS concentrations. In addition, the presence of SDS increases the surface tension decay rate and dilatational modulus, but it seems that their changes are not directly proportional to the SDS concentration. This study indicates that particle–surfactant mixtures can be a potential strategy to modify the particle surface properties and therefore improve foam properties, facilitating the application of zein-based particles in the food and cosmetic industry.
机译：在该研究中，已经进行了通过用常规阴离子表面活性剂（十二烷基硫酸钠，SDS）的Zein / Ta胶体颗粒（ZTP）混合物稳定的泡沫的行为的详细研究。通过在本研究中测试的所有浓度的一天内，通过颗粒或表面活性剂稳定的泡沫在本研究中测试的所有浓度下稳定。然而，可以在表面活性剂存在下诱导ZTP以形成分形簇。在混合颗粒表面活性剂体系中，相对于泡沫性质发生协同作用，因为分形簇可以用作具有反应活性的结构块，以形成具有有序界面结构的稳定泡沫。随着SDS浓度的增加，ZTP-SDS混合物的成形性增加。然而，泡沫稳定性在0.6mm SDS的最大值增加到最大值，然后在更高的SDS浓度下降低。此外，SDS的存在增加了表面张力衰减率和扩张模量，但似乎它们的变化与SDS浓度不正常成比例。该研究表明，颗粒表面活性剂混合物可以是改性颗粒表面性质的潜在策略，从而改善泡沫性质，便于在食品和化妆品行业中施加基于蛋白基颗粒。

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