短链醇溶液表面张力及表面吸附测定的实验研究

Experimental Exploration of Surface Tension and Surface Adsorption Properties of Typical Alcohol

分别测定得到6种短链醇溶液在不同浓度下的表面张力,考察了分子结构对表面张力和吸附性能的影响,提出了适用于综合实验的醇类稀溶液浓度范围,并利用Origin软件分别基于传统数据处理方式和曲线拟合方式计算得到吸附分子的横截面积。通过此实验,力求针对最大压差测定方法、处理实验数据和理论知识点3个目标层次,使学生尽可能全面地掌握表面化学相关实验原理和技术、数据处理方法,加深影响表面张力和吸附测定的因素和相应的概念、理论的理解,努力培养和提高学生实际应用能力。

The experiment content is based on and expanded from "the determination of solution surface adsorption and surface tension",and the system of a single n-butanol solution was expanded to ethanol,propanol,isopropanol,n-butanol,isobutanol,tert-butanol and other alcohols.The surface tensions of these six alcoholic solutions are measured respectively at different concentrations.The cross-sectional area of the adsorbed molecule is calculated by Origin software,and the effects of molecular structure on the surface tension and adsorption properties are investigated.Students are expected to grasp the factors of impact on the surface chemical-related physical determination,as well as the corresponding theory,data processing methods as much as possible,and to foster and develop their practical ability.