%0 Journal Article
%T <br>
%A 佟静
%A 刘璐
%A 张朵
%A 杨家振
%A 郑煦
%A 陈霞
%J 物理化学学报
%D 2017
%R 10.3866/PKU.WHXB201610251
%X 在288.15-328.15 K温度范围内，测量了不同浓度的氨基酸离子液体[C2mim][Ala]水溶液的密度和粘度，根据Jones-Dole方程得到了较大正值的粘度B系数并且dB/dT < 0。借助Feakins理论，计算了溶质对溶液粘滞流动活化自由能贡献Δμ2≠0，根据Δμ2≠0随温度的线性变化，进而得到流动活化熵ΔS2≠0和活化焓ΔH2≠0；在Eyring液体粘度的过渡态理论基础上，提出了预测离子液体[C2mim][Ala]水溶液粘度的半经验新方法，其预测值与相应的实验值很好的一致。<br>The density and viscosity of aqueous solutions of an ionic liquid (IL) based on alanine, [C2mim] [Ala], with various molalities were measured in the temperature range of T=288.15-328.15 K with intervals of 5 K. From the Jones-Dole equation, a viscosity B-coefficient with a large positive value and dB/dT < 0 were obtained. According to Feakins, the contribution of the solute to the activation free energy for viscous flow of the solution, Δμ2≠0, was obtained. The relationship between Δμ2≠0 and temperature was linear, allowing the standard molar activation entropy, ΔS2≠0, and enthalpy, ΔH2≠0, to be obtained. On the basis of Eyring's theory, a new semi-empirical method to estimate the viscosity of aqueous[C2mim] [Ala] was proposed. The values estimated using this method agreed well with the corresponding experimental ones
%U http://www.whxb.pku.edu.cn/CN/Y2017/V33/I3/513