离子液体的黏度与其扩散系数和电导率的新型关系方程

离子液体的传递性质对其在化学化工等领域的研究和应用至关重要,但迄今文献中缺乏可靠的理论预测模型或传递性质间的相互关系式,因此,有必要建立传递性质间的相互关系以便应用.本文建立了离子液体黏度与扩散系数或电导率间的定量关系,并利用文献实验数据进行了系统检验.结果表明,新方程可由离子液体黏度数据准确预测其扩散系数和电导率.与Stokes-Einstein方程相比,新方程不仅可解释离子液体中的许多实验现象,而且实现了定量预测(无需离子的有效流体力学半径数据).

New relations between viscosity and self-diffusion coefficient or conductivity of ionic liquids

Transport properties of ionic liquids are important for their industrial applications. The lack of the predictive theories and reliable correlations between different transport properties has made it necessary to establish new relations between various transport properties. In this paper, the new predictive relations either between viscosity and diffusion coefficient or between viscosity and conductivity are established and are systematically tested by comparisons with the reported experimental results. All predictions are in nice agreements with the experimental results. In comparison with the Stokes-Einstein relation, the new relations not only well explain many novel phenomena displayed by ionic liquids, but also offer accurate predictions （do not require invoking the information on the effective hydrodynamic radius）.