摘要
在Rubingh与Rosen提出非理想二元表面活性剂复配增效条件基础上 ,利用相分离模型和正规溶液理论 ,导出了体系降低表面张力的能力增效条件 βs- βm<0 ,及最佳摩尔分数α1 、最低表面张力γ cmc12 和γ cmc处对应的临界胶束浓度cmc 12 。通过作三条γ～logc曲线或两条γ～logc曲线加上一个cmc值的方法 ,对C12 NMe3Br～C12 SO4 Na、C12 NMe3Br～C8SO4 N两种复配体系进行验证 。
With the help of the phase separation model and the regular solution theory, on the basis of synergism conditions derived by Rubingh and Rosen, some synergism parameters in surface tension reduction effectiveness in binary mixed systems of surfactants are obtained, including the synergism condition ( β s-β m< 0), the optimum molar fraction α * 1, the lowest surface tension of the mixture γ * cmc and the corresponding critical micelle concentration cmc 12 * at the point of maximum synergism. Application of these relationships to two binary systems of surfactants, C 12 NMe 3Br^C 12 SO 4Na and C 12 NMe 3Br^C 8SO 4Na, shows both the systems to be consistent with observed data. This indicates that an easier and more accurate method on the study of synergism in nonideal binary mixed systems of surfactants has been obtained.
基金
国家自然科学基金资助项目 (2 990 30 0 6
2 99730 2 3)
2 0 0 0年教育部重点实验室访问学者基金&&
