Impact of imidazolium-based ionic liquid surfactant additions on dilational rheology properties of different protein adsorption layer

文献类型： 外文期刊

第一作者： Cao, Li-Dong

作者： Cao, Li-Dong;Huang, Qi-Liang;Du, Feng-Pei

作者机构：

关键词： Dilational rheology; imidazolium-based ionic liquid surfactant; interfacial tension; protein

期刊名称：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY （ 影响因子：2.262； 五年影响因子：2.064 ）

ISSN： 0193-2691

年卷期： 2018 年 39 卷 3 期

页码：

收录情况： SCI

摘要： The interfacial behavior of beta-casein and BSA solutions have been investigated in the presence of imidazolium-based ionic liquid surfactant ([C-14mim]Br) at the decane/water interface with the oscillating the drop and interfacial tension relaxation measurements. Both the electrostatic and the hydrophobic interaction between protein and [C-14mim]Br played crucial roles as [C-14mim]Br concentration increases. Furthermore, it was found that the dilational rheology parameters provided information of the adsorbed layers structure, and the dynamics properties of the adsorbed layers depend on the bulk [C-14mim]Br concentration. Moreover, with the concentration of [C-14mim]Br increasing, beta-casein in the interfacial layer was subject to conformational changes where it gave space to [C-14mim]Br molecules in the form of co-adsorb; for BSA/[C-14mim]Br solutions, the globule protein BSA deformed and then co-adsorb with [C-14mim]Br molecules at the decane/water interface. These results will contribute to elucidation of the influence of the surfactant on the different structure proteins and the wide applications of protein/surfactant systems in practice. [GRAPHICS] .

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