【摘要】 对二元完全互溶双液体系的稀溶液,建立一个理想吸附模型,以统计热力学原理可得到本文所引入的吸附表征参数Z的数学形式。利用微机处理,可得到以下结论:a)吸附表面层仅指溶质与溶剂分子尚存在相互作用,但性质又区别于体相的一厚度δ的薄层,而这吸附表面层中的“溶质分子”仅指溶质分子中的亲水部分,即并非是溶质的全分子。b)随着吸附分子浓度增大,表面超量Г值增大,吸附表征参数Z值减小;当吸附分子达到单层吸附饱和时,Г达到最大值Г_m,相应地Z达到最小值Zm。更多还原

【Abstract】 In this paper, based on one ideal adsorption model for a binary completely mixed dilute solution, the mathematical expression of the title functor Z was introduced by the principle of statistical ther- modynamics. Utilizing the treatment with a microcomputer, the following results were obtained, a) The adsorption layer at solution surface is only a thin structure of δ in thickness, in which there is some interaction between solvent and solute, but its interaction is different from that in the body phase of solution. The "solute" in the above adsorption layer only consists of the hydropholic part of the solute molecule but not its whole. b) With the increase of the molar concentration of solute in the solution, the surface excess concentration Г will rise but the specific functor Z of adsorption will fall. When the single layer of saturated adsorption is formed, the data of Г and Z will reach its maximum and minium respectively.更多还原