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-  2015 


DOI: 10.3866/PKU.WHXB201509112

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Abstract:

采用流变测试技术考察了两种阴离子表面活性剂油酸钠(NaOA)和芥酸钠(NaOEr)在四丁基溴化铵(TBAB)和KCl诱导下构筑蠕虫状胶束的行为.随着KCl浓度增加, NaOA水溶液粘度增加,而加入TBAB使NaOA-KCl样品的粘度持续降低.与之相反, TBAB浓度的增加却使NaOEr-KCl样品的粘度大幅度增强.此外, NaOEr分子比NaOA表现出更强的形成胶束的能力,构成粘弹性蠕虫状胶束所需表面活性剂浓度和盐浓度更少.本文采用TBAB和KCl两种盐协同诱导NaOEr,制备了具有强粘弹性的阴离子蠕虫状胶束,探讨了盐TBAB/KCl对长链阴离子表面活性剂构筑蠕虫状胶束的影响机理.
Using rheological measurements, we investigated the wormlike micelles formed by anionic surfactants, sodium oleate (NaOA), and sodium erucate (NaOEr) in the presence of KCl and tetrabutyl ammonium bromide (TBAB). The viscosity of the NaOA solution increased with KCl concentration, but adding TBAB decreased viscosity. In contrast, the apparent viscosity of NaOEr-KCl solution enhances with increasing TBAB concentration. In addition, NaOEr is better than NaOA at encouraging the construction of viscoelastic wormlike micelles, needing less surfactant and a lower salt concentration. We prepared a wormlike micelle system with strong viscoelasticity by using NaOEr, cooperatively induced by KCl and TBAB. Based on these studies, we discussed the complex influence of TBA+ on constructing wormlike micelles

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