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将脉冲电场(PEF)与电解质溶液活度联系在一起,对溶液热力学理论的研究有着突出性的重要意义。通过对不同浓度的KCl溶液施加PEF,观测其对溶液电导率的影响,并应用电导率法计算溶液的活度系数。在Onsager电导方程和Guggenheim经典热力学理论的基础上,提出了计算溶液活度系数的新模型,可将电导率法的应用范围提高到1 mol/L浓度以内。通过计算发现,在施加PEF后,可在一定程度上提高KCl溶液的活度系数。并且从溶液微观结构上对KCl溶液活度系数的改变作了深入阐述。
Combining the pulsed electric field (PEF) with the activity of electrolyte solution, the research on solution thermodynamics is of outstanding importance. PEF was applied to different concentrations of KCl solution to observe its effect on the conductivity of the solution, and the conductivity coefficient was used to calculate the activity coefficient of the solution. Based on the Onsager conductance equation and Guggenheim classical thermodynamics theory, a new model for calculating the activity coefficient of the solution is proposed, which can increase the application range of the conductivity method to 1 mol / L. It is found by calculation that after the application of PEF, the activity coefficient of KCl solution can be improved to a certain extent. In addition, the change of activity coefficient of KCl solution from the microstructure of the solution was described in detail.