缔合液体是日常生活和工业生产过程中的常见媒介之一, 而声学和粘弹性质是其十分重要的基础性质之一。为此, 本文作者将布里渊散射测试方法用于纯水和甘油两种代表性缔合液体不同温度下的声学和粘弹性质的测试, 在180°背散射几何设置下测得了完整布里渊散射谱图。在构建系统理论描述的基础上, 计算获得了它们的声速、声吸收系数和剪切粘度等参数值, 从而进一步分析得到温度变化对液体材料声学性质及剪切粘度的影响。

Associated liquids is a kind of common media in daily life and industrial production process, and their acoustic and viscoelastic properties are very important in many scenes. To this end, the Brillouin scattering spectroscopy is used to measure the acoustic and viscoelastic properties of two representative associative liquids, pure water and glycerol, at different temperatures. Complete spectra were obtained at 180° backscattering geometry. Based on a full theoretical description of the system, the acoustic absorption coefficient and shear viscosity were calculated, and the influence of temperature on those properties was further achieved.