【摘要】 采用悬滴技术分别测量了正己烷-水、正庚烷-水、正辛烷-水、正壬烷-水和正己醇-水、正庚醇-水、正辛醇-水、正壬醇-水8个系统常压下温度为293.15～343.15 K之间的界面张力.讨论了界面张力与温度的关系,发现烷烃-水系统界面张力随温度的升高呈直线下降趋势,而醇-水系统的界面张力则随温度的升高呈先增加后又变小的规律.另外,对目前广受关注的、估算界面张力的N-A法作了进一步的验证和讨论.更多还原

【Abstract】 The interfacial tensions of binary liquid-liquid systems ( n-heptane+water), ( n-hexane+water) , (n-octane+water) , (n-nonane + water), (n-heptanol water) , (n-hexanol+water) , (n-octanol+water) , (n- nonanol + water) in the temperature range from 298.15 K to 343.15 K at constant pressure were measured by the pendant drop method. The interfacial tensions of aliphatic hydrocarbon - water systems decreased linearly with higher temperature, but those of aliphatic alcohol - water systems increased, then decreased with higher temperature. In addition, the N - A method used for estimating interfacial tensions was discussed further, which is paid a good deal of attentionto and is one of the purposes of this research.更多还原