For many years the determination of the shear viscosity of interfacial layers has been source of strong controversy. This is mainly because different techniques provided different values of such parameter, which leads in many cases to a puzzling interpretation of the experimental results. One possible explanation of this is the non-correct analysis of the hydrodynamic conditions of the measurement and, in particular, the assumption of some approximations that may not be necessarily valid in all cases. The introduction of hydrodynamic consideration in the study of interfacial shear rheology has helped to clarify some of the existing discrepancies between measurements performed using different devices, thus allowing one to establish clearly the viscosity range in which different techniques can operate with enough sensitivity for determining the interfacial shear viscosity. This review puts in perspective the most recent developments on the studies of the interfacial shear rheology of fluid/fluid interfaces, analyzing the strength and weakness of the different approaches.

多年来，确定界面层的剪切粘度一直是引起争议的根源。这主要是因为不同的技术提供了不同的此类参数值，这在许多情况下导致对实验结果的令人困惑的解释。一种可能的解释是对测量的流体动力学条件的非正确分析，尤其是对某些近似值的假设，这些近似值不一定在所有情况下都有效。在界面剪切流变学研究中引入水动力考虑因素有助于澄清使用不同设备进行的测量之间存在的一些差异，因此，可以清楚地确定粘度范围，在该范围内，不同技术可以足够灵敏地操作以确定界面剪切粘度。本文综述了流体/流体界面界面剪切流变学的最新进展，分析了不同方法的优缺点。