二元理想（甲苯/氟苯）和非理想（乙醇/水）液体混合物的冲击 Hugoniot 状态方程。

Shock Hugoniot equations of state for binary ideal (toluene/fluorobenzene) and nonideal (ethanol/water) liquid mixtures.

机构信息

Shock and Detonation Physics Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

出版信息

J Phys Chem A. 2013 Jul 25;117(29):6158-63. doi: 10.1021/jp400310k. Epub 2013 May 21.

Abstract

Laser shock Hugoniot data were obtained using ultrafast dynamic ellipsometry (UDE) for both nonideal (ethanol/water solutions with mole percent χ(ethanol) = 0%, 3.4%, 5.4%, 7.5%, 9.7%, 11%, 18%, 33%, 56%, 100%) and ideal liquid mixtures (toluene/fluorobenzene solutions with mole percent χ(toluene) = 0%, 26.0%, 49.1%, 74.9%, 100%). The shock and particle velocities obtained from the UDE data were compared to the universal liquid Hugoniot (ULH) and to literature shock (plate impact) data where available. It was found that the water UDE data fit to a ULH-form equation suggests an intercept of 1.32 km/s, lower than the literature ambient sound speed in water of 1.495 km/s (Mijakovic et al. J. Mol. Liq. 2011, 164, 66-73). Similarly, the ethanol UDE data fit to a ULH-form equation suggests an intercept of 1.45 km/s, which lies above the literature ambient sound speed in ethanol of 1.14 km/s. Both the literature plate impact and UDE Hugoniot data lie below the ULH for water. Likewise, the literature plate impact and UDE Hugoniot data lie above the ULH for ethanol. The UDE Hugoniot data for the mixtures of water and ethanol cross the predictions of the ULH near the same concentration where the sound speed reaches a maximum. In contrast, the UDE data from the ideal liquids and their mixtures are well behaved and agree with ULH predictions across the concentration range. The deviations of the nonideal ethanol/water data from the ULH suggest that complex hydrogen bonding networks in ethanol/water mixtures alter the compressibility of the mixture.

摘要

使用超快动态椭圆测量法（UDE）获得了激光激波 Hugoniot 数据，包括非理想（摩尔分数为χ（乙醇）= 0%、3.4%、5.4%、7.5%、9.7%、11%、18%、33%、56%、100%的乙醇/水溶液）和理想液体混合物（摩尔分数为χ（甲苯）= 0%、26.0%、49.1%、74.9%、100%的甲苯/氟苯溶液）的 Hugoniot 数据。从 UDE 数据中获得的冲击和粒子速度与通用液体 Hugoniot（ULH）以及可用的文献冲击（平板撞击）数据进行了比较。结果发现，水 UDE 数据符合 ULH 形式方程，表明截距为 1.32km/s，低于文献中水中的环境声速 1.495km/s（Mijakovic 等人，J. Mol. Liq.，2011，164，66-73）。同样，乙醇 UDE 数据符合 ULH 形式方程，表明截距为 1.45km/s，高于文献中乙醇中的环境声速 1.14km/s。文献中的平板撞击和 UDE Hugoniot 数据均低于水的 ULH。同样，文献中的平板撞击和 UDE Hugoniot 数据均高于乙醇的 ULH。水和乙醇混合物的 UDE Hugoniot 数据在接近声速达到最大值的相同浓度处穿过 ULH 的预测值。相比之下，理想液体及其混合物的 UDE 数据表现良好，在整个浓度范围内均符合 ULH 预测。非理想乙醇/水溶液数据与 ULH 的偏差表明，乙醇/水溶液混合物中复杂的氢键网络改变了混合物的可压缩性。