摘要
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.
作者
周亭
陈俊峰
张志庆
张国栋
王芳珠
ZHOU Ting;CHEN Junfeng;ZHANG Zhiqing;ZHANG Guodong;WANG Fangzhu(College of Science,China University of Petroleum (East China),Qingdao 266580,Shandong,China;College of Chemical Engineering, China University of Petroleum (East China),Qingdao 266580,Shandong,China)
出处
《实验室研究与探索》
CAS
北大核心
2019年第1期27-30,68,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(21703286)
山东省自然科学基金项目(ZR2017MB045
ZR2016BL14)
山东省教学改革面上项目(2015M021)
中国石油大学(华东)教学实验技术改革项目(SYB201618
SZ201826)
中国石油大学(华东)教学研究与改革项目(QN201725
JY-B201634)
关键词
表面张力
饱和吸附量
最大压差
吸附等温式
surface tension
saturated adsorption
maximum bubble pressure
isothermal adsorption equation