STUDY OF THE SUJRFACE TENSION FORALCOHOL AQUFOUS SOLUTION UNDER HIGH PRESSURE

得到了醇和丁醇水溶液的表面张力和饱和液密度的实验数据。乙醇和1-丙醇的样品纯度为99.5质量%。1-丁醇、1-戊醇的纯度分别为99.0质量%和98.5质量%。1-己醇和1-庚醇的样品纯度为98.0质量%。采用毛细管差分上升法测定表面张力。本研究采用内半径分别为0.2754±0.0003 mm、0.3653±0.0003 mm、0.6475±0.0002 mm、0.7526±0.0009 mm和0.8541±0.0003 mm的5根毛细血管。在273 ~ 341 K的温度范围内得到了乙醇、1-丙醇、1-丁醇、1-戊醇、1-己醇和1-庚醇的实验数据。温度和表面张力测量的不确定度估计分别在±20 mK和±0.1 mN/in。在此基础上，通过最小二乘拟合得到了表面张力与饱和液密度的相关关系。乙醇、1-丙醇、1-丁醇、1-戊醇、1-己醇、1-庚醇的表面张力相关性可以再现，平均偏差分别为±0.05 mN/m、±0.06 mN/m、±0.07 mN/m、±0.10 mN/m和±0.59 mN/m。乙醇和1-丁醇的饱和液体密度相关性均可再现，平均偏差在±0.01 kg/m^3以内。在283 ~ 348 K的温度范围内，获得了1.0% 1-丁醇水溶液的16个表面张力数据。在289 ~ 355 K的温度范围内，获得了1.5% - 1-丁醇水溶液的15个表面张力数据。此外，在275 ~ 353 K的温度范围内，得到了0.5%、1.0%、1.5%和2.0% 1-丁醇水溶液的饱和液体密度数据。在现有数据的基础上，用最小二乘法拟合出密度相关的相关关系。

The experimental data of the surface tension and saturated liquid density for alcohol and 1-butanol aqueous solution were obtained. The sample purity for ethanol and 1-propanol were 99.5 mass%. The sample purity for 1-butanol, 1-pentanol were 99.0 mass% and 98.5 mass%. The sample purity for 1-hexanol and 1-heptanol were 98.0 mass%.The surface tension was measured by the differential capillary rise method. In this study, five capillaries that inner radii are 0.2754±0.0003 mm, 0.3653±0.0003 mm, 0.6475±0.0002 mm, 0.7526±0.0009 mm and 0.8541 ± 0.0003 mm, were used. Experimental data of ethanol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol and 1-heptanol were obtained in the temperature range between 273 K and 341 K. The uncertainty of temperatures and surface tension measurements are estimated to be within ±20 mK and ± 0.1 mN/in, respectively.In addition, on the basis of these data, the surface tensions as well as saturated liquid density correlations were made by least squares fitting. The surface tension correlation of ethanol, 1-propanol, 1-butanol, 1-pentanol, 1-hexanol, 1-heptanol can reproduced with the average deviation of ± 0.05 mN/m, ± 0.06 mN/m, ± 0.07 mN/m, ± 0.10 mN/m, and ± 0.59 mN/m, respectively. The saturated liquid density correlation of both ethanol and 1-butanol can reproduced with the average deviation within ± 0.01 kg/m^3.Sixteen surface tension data of 1.0 %1-butanol aqueous solution were obtained in the temperature range between 283 K and 348 K. Fifteen surface tension data of 1.5 %1-butanol aqueous solution were obtained in the temperature range between 289 K and 355 K. In addition, saturated liquid densities data of 0.5 %, 1.0 %, 1.5 % and 2.0 % 1-butanol aqueous solution were obtained in the temperature range between 275 K and 353 K. On the basis of the present data, the correlations of the density correlations were made by least squares fitting.