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A comparative study on the interface tension and interface dilational rheological properties of three sodium N-acyl aromatic amino acid surfactants
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-10 , DOI: 10.1039/d0ra03713c Fan Zhang 1 , Qun Zhang 1 , Jian Yang 2 , Yawen Zhou 2 , Zhaohui Zhou 1 , Ce Wang 2
RSC Advances ( IF 3.9 ) Pub Date : 2020-7-10 , DOI: 10.1039/d0ra03713c Fan Zhang 1 , Qun Zhang 1 , Jian Yang 2 , Yawen Zhou 2 , Zhaohui Zhou 1 , Ce Wang 2
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Interface dilational rheology is useful for understanding and exploring the role of interface phenomena. However, relatively few studies have been conducted on the interface dilational rheological properties of N-acyl aromatic amino acid surfactants. Herein, surface tension and the dynamic interface tension and dilational rheological properties of three surfactants, namely, sodium N-lauroyl phenylalaninate (SLP), sodium N-lauroyl tyrosinate (SLTy), and sodium N-lauroyl citrate (SLTr) were investigated. The results show that the order of critical micelle concentration, which includes the surface tension at the critical micelle concentration, minimum area per surfactant molecule, and interfacial tension, was SLTr < SLTy < SLP. At a low surfactant concentration, the three surfactants exhibited a low-viscosity interfacial elastic film at the n-decane/water interface. The dilational modulus increased and the phase angle decreased with increase in frequency. However, the order of the dilational modulus was SLP < SLTy < SLTr, while the order of the phase angle change was SLTr < SLTy < SLP at the same frequency. With increase in surfactant concentration, the dilational modulus of SLP and SLTy increased and then decreased after a maximum value; however, the dilational modulus plot of SLTr demonstrated two maxima.
中文翻译：
三种N-酰基芳香族氨基酸钠表面活性剂界面张力和界面膨胀流变性能的比较研究
界面膨胀流变学有助于理解和探索界面现象的作用。然而，关于N-酰基芳香族氨基酸表面活性剂界面膨胀流变性质的研究相对较少。在此， N-月桂酰苯丙氨酸钠 (SLP)、N-月桂酰酪氨酸钠( SLTy) 和N三种表面活性剂的表面张力、动态界面张力和膨胀流变学性质研究了柠檬酸月桂酰(SLTr)。结果表明，临界胶束浓度（包括临界胶束浓度下的表面张力、每个表面活性剂分子的最小面积和界面张力）的顺序为SLTr < SLTy < SLP。在低表面活性剂浓度下，三种表面活性剂在n处表现出低粘度的界面弹性膜。-癸烷/水界面。随着频率的增加，膨胀模量增加，相位角减小。但是，在相同频率下，膨胀模量的顺序是 SLP < SLTy < SLTr，而相位角变化的顺序是 SLTr < SLTy < SLP。随着表面活性剂浓度的增加，SLP和SLTy的膨胀模量在达到最大值后先增大后减小；然而，SLTr 的膨胀模量图显示了两个最大值。
更新日期：2020-07-10
中文翻译：
三种N-酰基芳香族氨基酸钠表面活性剂界面张力和界面膨胀流变性能的比较研究
界面膨胀流变学有助于理解和探索界面现象的作用。然而，关于N-酰基芳香族氨基酸表面活性剂界面膨胀流变性质的研究相对较少。在此， N-月桂酰苯丙氨酸钠 (SLP)、N-月桂酰酪氨酸钠( SLTy) 和N三种表面活性剂的表面张力、动态界面张力和膨胀流变学性质研究了柠檬酸月桂酰(SLTr)。结果表明，临界胶束浓度（包括临界胶束浓度下的表面张力、每个表面活性剂分子的最小面积和界面张力）的顺序为SLTr < SLTy < SLP。在低表面活性剂浓度下，三种表面活性剂在n处表现出低粘度的界面弹性膜。-癸烷/水界面。随着频率的增加，膨胀模量增加，相位角减小。但是，在相同频率下，膨胀模量的顺序是 SLP < SLTy < SLTr，而相位角变化的顺序是 SLTr < SLTy < SLP。随着表面活性剂浓度的增加，SLP和SLTy的膨胀模量在达到最大值后先增大后减小；然而，SLTr 的膨胀模量图显示了两个最大值。
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