【作者】 王晓玲；

【导师】 李小云； 王建英；

【作者基本信息】 河北科技大学 ， 化学工程， 2011， 硕士

【摘要】 离子液体是由阴阳离子组成的在室温或室温温度下呈液态的物质。离子液体具有较宽的液态范围,良好的溶解性,能溶解许多有机物、无机物,无蒸汽压,无挥发性,易回收重新使用等特点,基于这些特点,研究者对离子液体进行了更广泛的研究,本文主要做了如下工作：研究了十种纯离子液体的密度和表面张力,并对离子液体的分子体积Vm、标准熵S°、晶格能UPOT及离子液体表面性能等热力学性质进行了讨论,并将硬球模型理论应用于离子液体表面张力的计算,并对实验测定的10个纯离子液体的表面张力的实验数据进行关联,并计算得到实验表面张力值与理论表面张力值的平均偏差为0.53%,结果令人满意。测定了常压、298.15 K下的1-乙基-3-甲基咪唑硫酸甲酯([C2mim]MeSO4)、N-丁基吡啶硝酸盐([BuPy]NO3)、N-辛基吡啶硝酸盐([OcPy]NO3)与分子溶剂(水,甲醇,乙醇,正丁醇)在不同摩尔分数下混合的密度和表面张力,并由实验得到的密度数据计算得到二元混合体系摩尔体积、超额摩尔体积、表面张力偏差,并将超额摩尔体积和表面张力偏差用R-K方程进行拟合。另外,本论文还测定了离子液体[Cnmim]BF4/正己烷(n=3、4、5、6),[Cnmim]BF4/环己烷(n=4、6、8、10),[Cnmim]BF4/正庚烷(n=3、4、5、6)体系的界面张力,并对界面性能进行研究。更多还原

【Abstract】 Ionic liquid which composed by ion of anion and cationic is liquid substances in room temperature.Ionic liquid has a wider range of liquid, good solubility which can dissolve organic, inorganic and many without steam pressure, without volatile, easy recovery to use characteristic, based on these features of ionic liquid.the researchers conducted more extensive research, this paper mainly do the following:In this paper, the density and surface tension of the ten pure ionic liquid have been studied. Molecular volume, Vm,standard entropies,S°,lattice energy, UPOT,and the surface properties of the ten ionic liquid which obtained from the experimental density values were also discussed. Reiss molecular hard-sphere model is applied to calculate the surface tension of a pure ionic liquid, then correlate the surface tension data of the 10 pure ionic liquid system to get the corresponding correlation parameters.The average deviation of surface tension is 0.53%. The calculation results are very successful.Density and surface tension have been measured over the whole composition range for [C2mim]MeSO4,[BuPy]NO3, [OcPy]NO3 with molecue solven(water, methanol, ethanol, 1-butanol) binary systems at 298.15 K and atmospheric pressure. Excess molar volumes and surface tension deviations for the binary systems have been calculated and were fitted to a Redlich-Kister equation to determine the fitting parameters and the root mean square deviations.In addition,the interface performance and interface tension between [Cnmim]BF4/hexane (n=3、4、5、6), [Cnmim]BF4/cyclohexane (n=4、6、8、10), [Cnmim]BF4/heptane (n=3、4、5、6) have been studied.更多还原