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在20℃测定了硅胶在五个理想二元溶液全组分范围内的吸附。这五个理想溶液是苯—甲苯、苯—氯苯、甲苯—氯苯,甲苯—溴苯及氯苯—溴苯,得到吸附顺序如下: 苯>甲苯>氯苯>溴苯发现单从吸附物的某种分子特性的观点难于解释上列吸附顺序,在对实验和文献数据以及硅胶亲水特性作了分析之后,基于吸附物在水中的溶度顺序提出了一种定性解释,它与对水相和对硅胶表面的界面张力顺序是相合的。因此,硅胶从五个二元理想溶液中的吸附行为与Gibbs吸附理论所预示的是一致的。
The adsorption of silica gel over the entire composition of five ideal binary solutions was determined at 20 ° C. The five ideal solutions are benzene-toluene, benzene-chlorobenzene, toluene-chlorobenzene, toluene-bromobenzene and chlorobenzene-bromobenzene. The adsorption order is as follows: benzene> toluene> chlorobenzene> After analyzing the experimental and literature data as well as the hydrophilic character of silica gel, a qualitative explanation based on the order of solubility of the adsorbate in water is proposed, which is in agreement with the analysis of water Phase and interfacial tension on the surface of silica gel is consistent. Therefore, the adsorption behavior of silica gel from five binary ideal solutions is in agreement with the Gibbs adsorption theory.