研制了悬滴法表面张力实验系统，温度测量范围为283．15～323．15 K ，温度测量误差不超过±0．5 K ．采用轮廓拟合法对表面张力进行计算，在VC＋＋环境下分别用坐标轮换法和Nelder‐Mead单纯形法进行了编程实现．利用正庚烷和乙醇...研制了悬滴法表面张力实验系统，温度测量范围为283．15～323．15 K ，温度测量误差不超过±0．5 K ．采用轮廓拟合法对表面张力进行计算，在VC＋＋环境下分别用坐标轮换法和Nelder‐Mead单纯形法进行了编程实现．利用正庚烷和乙醇对实验系统进行校验，结果表明：2种物质的表面张力实验值与文献值偏差在±0．2mN·m －1以内，坐标轮换法和Nelder‐Mead单纯形法的计算结果一致。展开更多
Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide（DMSO）/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with lite...Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide（DMSO）/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with literature could be found. With the new apparatus, the surface tensions of nine DMSO/water mixtures with mass frac- tions of water from 0.1 to 0.9 were investigated in a temperature range of 298--338 K. The expanded uncertainty for surface tension measurement was estimated to be 0.5% at a confidence level of 95%（k=-2） in the whole temperature range. A thermodynamic-based relation was used to predict the surface properties of DMSO/water mixtures. Based on the relation and Gibbs adsorption theory, a prediction model was proposed for the calculation of surface relative excess and the thickness of the surface molecule layer.展开更多
文摘研制了悬滴法表面张力实验系统，温度测量范围为283．15～323．15 K ，温度测量误差不超过±0．5 K ．采用轮廓拟合法对表面张力进行计算，在VC＋＋环境下分别用坐标轮换法和Nelder‐Mead单纯形法进行了编程实现．利用正庚烷和乙醇对实验系统进行校验，结果表明：2种物质的表面张力实验值与文献值偏差在±0．2mN·m －1以内，坐标轮换法和Nelder‐Mead单纯形法的计算结果一致。
基金Supported by the Specialized Research Fund for the National Natural Science Foundation of China（Nos.51506140, 51306127） and the Research Funds from Taiyuan University of Technology, China.
文摘Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide（DMSO）/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with literature could be found. With the new apparatus, the surface tensions of nine DMSO/water mixtures with mass frac- tions of water from 0.1 to 0.9 were investigated in a temperature range of 298--338 K. The expanded uncertainty for surface tension measurement was estimated to be 0.5% at a confidence level of 95%（k=-2） in the whole temperature range. A thermodynamic-based relation was used to predict the surface properties of DMSO/water mixtures. Based on the relation and Gibbs adsorption theory, a prediction model was proposed for the calculation of surface relative excess and the thickness of the surface molecule layer.
