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烷烃与海水界面张力的研究
陈国华, 佘敬曾, 郭玲, 黄健, 朱茜, 刘清锐, 杨文利
青岛海洋大学化学系 青岛 266003
摘要:
于1991年3月－1992年6月间用液体积法较系统地测定正己烷、正庚烷、正辛烷、异辛烷、正十二烷、正十六烷和煤油与海水在不同的温度（16–40°C）和盐度（10–40）范围内的界面张力，测定值的相对误差≤0.5％。对数据进行统计处理后，归纳出所研究烷烃－海水界面张力与温度和盐度的经验关系式，计算值与实验值相对误差≤0.5％。
关键词:  烷烃－海水界面  界面张力  经验关系式
DOI：
分类号:
基金项目:国家自然科学基金及国家海洋局科技发展基金联合资助项目，49070272号
STUDY ON ALKANE-SEAWATER INTERFACIAL TENSION
Chen Guohua, She Jingzeng, Guo Ling, Huang Jian, Zhu Qian, Liu Qingrui, Yang Wenli
Department of Marine Chemistry, Ocean University of Qingdao, Qingdao 266003
Abstract:
The respective alkane (n-c6, n-c7, n-c8,i-8, n-c12, n-c16 and kerosene, respectively)-seawater interfacial tension (I.T. ) in the temperature range of 16 - 40 °C and salinity range of 10 - 40 were determined with the drop-volume method by the authors from 1991 to 1992. The relative standard deviation of measured values <=0.5%. Seven empirical equations obtained on the basis of these measurements directly relates the alkanes-seawater I.T. with the temperature and salinity. The results show that all the alkanes-seawater I. T. decrease linearly with the rise of temperature. The salinity coefficient of the (n-c6, n-c7, n-c8, and i-c8)-seawater I.T. is positive, negative for n-c12 or n-c16. A model of adsorption at the alkane-seawater interface is presented for interpretation of this change of I .T. with salinity.
Key words:  Alkane-seawater interface, Interfacial tension, Experimental equation
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